SWVA BANCSHARES INC
8-K, EX-99.1, 2000-08-08
SAVINGS INSTITUTION, FEDERALLY CHARTERED
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                                  EXHIBIT 99.1


<PAGE>







                          AGREEMENT AND PLAN OF MERGER

                                     BETWEEN

                              SWVA BANCSHARES, INC.

                                       AND

                                 FNB CORPORATION

                              --------------------

                                 August 7, 2000






<PAGE>
                                TABLE OF CONTENTS


                                    ARTICLE 1
                         The Merger and Related Matters
<TABLE>
<CAPTION>
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<S>      <C>                                                                             <C>
1.1       Definitions...................................................................    2
1.2       The Merger....................................................................    2
1.3       Name and Continuing Operations................................................    2
1.4       Management of FNB and the Banks...............................................    3
1.5       The Closing and Effective Date................................................    3


                                    ARTICLE 2
                         Basis and Manner of Conversion

2.1       Conversion of SWVA Stock......................................................    3
2.2       Allocation....................................................................    4
2.3       Election......................................................................    5
2.4       Allocation of Cash Election Shares............................................    5
2.5       Allocation of Stock Election Shares...........................................    6
2.6       No Allocation.................................................................    6
2.7       Computations..................................................................    6
2.8       Cancellation of Shares........................................................    6


                                    ARTICLE 3
                               Manner of Exchange

3.1       Exchange Procedures...........................................................    7
3.2       Distributions with Respect to Unexchanged Shares..............................    8
3.3       No Fractional Securities......................................................    8
3.4       Certain Adjustments...........................................................    8
3.5       Rights of Dissenting Shareholders.............................................    9


                                    ARTICLE 4
                         Representations and Warranties

4.1       Representations and Warranties of SWVA........................................    9
         (a)    Organization, Standing and Power........................................    9
         (b)    Authority...............................................................    9
         (c)    Capital Structure.......................................................   10

</TABLE>



<PAGE>
<TABLE>
<CAPTION>
                                                                                         Page
                                                                                         ----

<S>      <C>                                                                             <C>

         (d)    Ownership Capital Structure and
                Organization of SVSB....................................................   10
         (e)    Financial Statements....................................................   11
         (f)    Absence of Undisclosed Liabilities......................................   11
         (g)    Legal Proceedings; Compliance with Laws.................................   12
         (h)    Regulatory Approvals....................................................   12
         (i)    Labor Relations.........................................................   12
         (j)    Tax Matters.............................................................   13
         (k)    Property................................................................   13
         (l)    Reports.................................................................   13
         (m)    Employee Benefit Plans..................................................   13
         (n)    Investment Securities...................................................   14
         (o)    Certain Contracts.......................................................   14
         (p)    Insurance...............................................................   15
         (q)    Loans, OREO and Allowance for Loan Losses...............................   15
         (r)    Absence of Material Changes and Events..................................   16
         (s)    Statements True and Correct.............................................   16
         (t)    Brokers and Finders.....................................................   17
         (u)    Repurchase Agreements...................................................   17
         (v)    Trust Accounts..........................................................   17
         (w)    Environmental Matters...................................................   17

4.2       Representations and Warranties of FNB.........................................   18
         (a)    Organization, Standing and Power........................................   18
         (b)    Authority...............................................................   19
         (c)    Capital Structure.......................................................   19
         (d)    Ownership of the FNB Subsidiaries; Capital Structure
                  of the FNB Subsidiaries; and Organization of the FNB
                  Subsidiaries..........................................................   20
         (e)    Financial Statements....................................................   20
         (f)    Absence of Undisclosed Liabilities......................................   21
         (g)    Legal Proceedings; Compliance with Laws.................................   21
         (h)    Regulatory Approvals....................................................   22
         (i)    Labor Relations.........................................................   22
         (j)    Tax Matters.............................................................   22
         (k)    Property................................................................   22
         (l)    Reports.................................................................   23
         (m)    Employee Benefit Plans..................................................   23
         (n)    Investment Securities...................................................   24
         (o)    Certain Contracts.......................................................   24
         (p)    Insurance...............................................................   24
         (q)    Loans, OREO, and Allowance for Loan Losses..............................   25
         (r)    Absence of Material Changes and Events..................................   26
         (s)    Statements True and Correct.............................................   26
         (t)    Brokers and Finders.....................................................   26


</TABLE>


<PAGE>
<TABLE>
<CAPTION>
                                                                                         Page
                                                                                         ----

<S>      <C>                                                                             <C>

         (u)    Repurchase Agreements...................................................   26
         (v)    Administration of Trust Accounts........................................   27
         (w)    Environmental Matters...................................................   27


                                    ARTICLE 5
                       Conduct Prior to the Effective Date

5.1      Access to Records and Properties...............................................   28
5.2      Confidentiality................................................................   29
5.3      Registration Statement, Proxy Statement and
         Shareholder Approval...........................................................   29
5.4      Operation of the Business of FNB and SWVA......................................   30
5.5      Dividends......................................................................   31
5.6      No Solicitation................................................................   31
5.7      Regulatory Filings.............................................................   31
5.8      Public Announcements...........................................................   32
5.9      Notice of Breach...............................................................   32
5.10     Accounting Treatment...........................................................   32
5.11     Merger Consummation............................................................   32
5.12     FNB Acquisition Transaction....................................................   32
5.13     Affiliate Agreements...........................................................   32


                                    ARTICLE 6
                              Additional Agreements

6.1      Conversion of Stock Options....................................................   32
6.2      Benefit Plans..................................................................   33
6.3      Indemnification................................................................   35


                                    ARTICLE 7
                            Conditions to the Merger

7.1      Conditions to Each Party's Obligations to Effect the
         Merger.........................................................................   35
         (a)    Shareholder Approval....................................................   35
         (b)    Regulatory Approvals....................................................   36
         (c)    Registration Statement..................................................   36
         (d)    Tax Opinion.............................................................   36
         (e)    Opinions of Counsel.....................................................   36
         (f)    Legal Proceedings.......................................................   36
         (g)    Amendment of SVSB ESOP..................................................   36

</TABLE>

<PAGE>
<TABLE>
<CAPTION>
                                                                                         Page
                                                                                         ----

<S>      <C>                                                                             <C>

7.2      Conditions to Obligations of FNB...............................................   36
         (a)    Representations and Warranties..........................................   36
         (b)    Performance of Obligations..............................................   37

7.3      Conditions to Obligations of SWVA..............................................   37
         (a)    Representations and Warranties..........................................   37
         (b)    Performance of Obligations..............................................   37
         (c)    Investment Banking Letter...............................................   37


                                    ARTICLE 8
                                   Termination

8.1      Termination....................................................................   37
8.2      Effect of Termination..........................................................   38
8.3      Non-Survival of Representations, Warranties and Covenants......................   39
8.4      Expenses.......................................................................   39


                                    ARTICLE 9
                               General Provisions

9.1      Entire Agreement...............................................................   40
9.2      Waiver and Amendment...........................................................   40
9.3      Descriptive Headings...........................................................   41
9.4      Governing Law..................................................................   41
9.5      Notices........................................................................   41
9.6      Counterparts...................................................................   42
9.7      Severability...................................................................   42
9.8      Subsidiaries...................................................................   42


Exhibit 1.4 - Addendum to Employment Agreements

Exhibit A - Plan of Merger between SWVA Bancshares, Inc. and FNB Corporation

Exhibit B - Exchange Agent Agreement

Exhibit C - Affiliate Agreement



</TABLE>

<PAGE>

                          AGREEMENT AND PLAN OF MERGER

         THIS AGREEMENT AND PLAN OF MERGER (the "Agreement") is made and entered
into as of August 7, 2000 by and between FNB Corporation, a Virginia corporation
with its principal office located in Christiansburg,  Virginia ("FNB"), and SWVA
Bancshares,  Inc., a Virginia  corporation  with its principal office located in
Roanoke, Virginia ("SWVA").

                                   WITNESSETH:

     WHEREAS, FNB and SWVA (together,  the "Companies") desire to affiliate,  so
that First National Bank ("First National") and Southwest Virginia Savings Bank,
FSB ("SVSB")  (together,  the "Banks") will be under the common  control of FNB;
and

     WHEREAS, FNB and SWVA have agreed to the affiliation of their two companies
through a merger under  Virginia law, as a result of which SWVA would merge with
and into FNB and the shareholders of SWVA would become  shareholders of FNB, all
as more  specifically  provided in this  Agreement and the Plan of Merger in the
form attached hereto as Exhibit A (the "Plan"); and

     WHEREAS, the Boards of Directors of the Companies each believe it is in the
best  interests  of their  respective  corporations  and their  shareholders  to
affiliate as provided herein and that the respective  shareholder  values of FNB
and SWVA can be maximized over time through this affiliation; and

     WHEREAS,  the Boards of  Directors of the  Companies  each believe that the
transaction  contemplated  in this  Agreement  is in the best  interests  of the
communities they serve and of their respective employees; and

     WHEREAS,  the Boards of Directors of the Companies  each believe that after
the  affiliation  the holding company  structure  should provide  management and
technical  assistance  and support for  recruitment,  training and  retention of
skilled  officers  and  employees  to the Banks in order to enable the  combined
organization to operate more efficiently; and

     WHEREAS,  the respective Boards of Directors of the Companies have resolved
that the transactions  described herein are in the best interests of the parties
and their respective shareholders and have authorized and approved the execution
and delivery of this Agreement.

     NOW,  THEREFORE,  in consideration of the premises and the mutual covenants
and agreements set forth herein, the parties hereby agree as follows:

                                       1
<PAGE>

                                    ARTICLE 1
                         The Merger and Related Matters

     1.1  Definitions. Any term defined anywhere in this Agreement shall
have the meaning  ascribed  to it for all  purposes  of this  Agreement  (unless
expressly noted to the contrary). In addition:

            (a) the term  "knowledge"  when used with  respect to a party  shall
mean the  knowledge of any  "Executive  Officer" of such party,  as such term is
defined in Regulation O, (12 C.F.R. 215);

            (b) the term  "Material  Adverse  Effect",  when applied to a party,
shall mean an event,  occurrence or circumstance  (including  without limitation
(i) the making of any provisions for possible loan and lease losses, write-downs
or other  real  estate  and taxes and (ii) any  breach  of a  representation  or
warranty by such party) which (a) has or is reasonably likely to have a material
adverse effect on the financial  position,  results of operations or business of
the party and its subsidiaries, taken as a whole, or (b) would materially impair
the  party's  ability to perform its  obligations  under this  Agreement  or the
consummation  of the  Merger  and the other  transactions  contemplated  by this
Agreement;  provided,  however, that solely for purposes of measuring whether an
event,  occurrence or circumstance has a material adverse effect on such party's
results of operations,  the term "results of operations" shall mean net interest
income plus  non-interest  income (less  securities  gains) less gross  expenses
(excluding  provisions for possible loan and lease losses,  write-downs of other
real estate and taxes);  and provided further,  that material adverse effect and
material  impairment shall not be deemed to include the impact of (i) changes in
banking and similar laws of general applicability or interpretations  thereof by
courts  or  governmental   authorities,   (ii)  changes  in  generally  accepted
accounting principles or regulatory accounting  requirements applicable to banks
and bank holding companies generally,  and (iii) the Merger and related expenses
associated with the transactions contemplated by this Agreement on the operating
performance of the parties to this Agreement; and

            (c)  the  term   "Previously   Disclosed"  by  a  party  shall  mean
information set forth in a written  disclosure  letter that is delivered by that
party to the other party prior to or  contemporaneously  with the  execution  of
this Agreement and specifically designated as information "Previously Disclosed"
pursuant to this Agreement.

         1.2 The Merger.  Subject to the terms and conditions of this Agreement,
at the Effective Date as defined in Section 1.5 hereof, SWVA will be merged with
and into FNB (the  "Merger").  At the Effective  Date, the Merger shall have the
effect as provided in Section 13.1-721 of the Virginia Stock Corporation Act.

         1.3   Name  and  Continuing  Operations.  The  respective  names and
banking  offices of the Banks will not change as a result of the  Merger.  After
the Effective Date, FNB shall continue to be  headquartered  in  Christiansburg,
Virginia.

                                       2
<PAGE>

         1.4  Management  of FNB and the  Banks.  The  directors,  officers  and
employees  of the Banks will not change as a result of the  Merger  except  that
Julian D. Hardy,  Jr. shall be appointed to the Board of SVSB.  On the Effective
Date, the number of Directors of FNB shall be increased by two members by adding
one  member  in  Class I whose  terms  expire  at the  2003  annual  meeting  of
shareholders  and by adding  one member in Class III whose  terms  expire at the
2002 annual meeting of shareholders.  B. L. Rakes shall be appointed to fill the
vacancy  created in Class I and  Courtney  Hoge shall be  appointed  to fill the
vacancy created in Class III. At the next annual meeting of shareholders of FNB,
management of FNB will recommend to shareholders that those gentlemen be elected
as a  member  of  Class I and  Class  III,  respectively.  In  addition,  on the
Effective Date, FNB agrees to assume the employment  agreements between SWVA and
D. W. Shilling and Barbara Weddle, and as of the Effective Time, FNB shall enter
into an Addendum to the  employment  agreement  for D. W.  Shilling  and Barbara
Weddle,  as attached  hereto as Exhibit  1.4. In addition,  as of the  Effective
Date,  FNB shall enter into an agreement with B. L. Rakes in which FNB agrees to
pay Mr. Rakes $17,000 in consideration for his agreement not to compete with FNB
and its affiliates for a period of one year.

         1.5   The   Closing  and   Effective   Date.   The  closing  of  the
transactions  contemplated  by this  Agreement and the Plan of Merger shall take
place at the offices of FNB in  Christiansburg,  Virginia or at such other place
as may be mutually agreed upon by the parties. The Merger shall become effective
on the date shown on the  Certificate of Merger issued by the State  Corporation
Commission  of Virginia  effecting  the Merger (the  "Effective  Date").  Unless
otherwise  agreed  upon in writing by the chief  executive  officers  of FNB and
SWVA,  subject to the conditions to the obligations of the parties to effect the
Merger as set forth in Article 6, the  parties  shall use their best  efforts to
cause the  Effective  Date to occur on the first day of the month  following the
month in which the  conditions  set forth in  Sections  7.1(a)  and  7.1(b)  are
satisfied. All documents required by the terms of this Agreement to be delivered
at or prior to  consummation  of the Merger will be  exchanged by the parties at
the  closing of the Merger  (the  "Merger  Closing"),  which shall be held on or
before  the  Effective  Date.  FNB and SWVA  shall  execute  and  deliver to the
Virginia State  Corporation  Commission  Articles of Merger containing a Plan of
Merger in substantially the form of Exhibit A hereto.

                                    ARTICLE 2
                         Basis and Manner of Conversion

         2.1   Conversion  of SWVA Stock. At the Effective Date, by virtue of
the Merger,  each share of the common stock,  par value $0.10 per share, of SWVA
("SWVA Common Stock") issued and outstanding  immediately prior to the Effective
Date will be converted into either cash (the "Cash  Consideration") or shares of
common stock, par value $5.00 per share, of FNB ("FNB Common Stock"), the "Stock
Consideration,"  which Stock Consideration  together with the Cash Consideration
(the  "Merger


                                       3
<PAGE>

Consideration"),  in each case as the holder  thereof  shall have  elected or be
deemed to have elected in accordance with Section 2.3.

         In the case that the Market Value of FNB Common Stock (as defined later
in this  Section  2.1) is equal to or greater than $15.30 per share and equal to
or less than $18.70 per share, the Cash  Consideration  will be $20.25 per share
and the Stock  Consideration will equal shares of FNB Common Stock with a Market
Value of  $20.25.  In the case  that the  Market  Value of FNB  Common  Stock is
greater  than $18.70 and less than or equal to $20.00,  the Stock  Consideration
will equal 1.083 shares of FNB Common Stock for each  outstanding  share of SWVA
Common Stock, and the Cash  Consideration  will be $20.25.  In the case that the
Market  Value of FNB  Common  Stock is less than  $15.30 and equal to or greater
than $14.00, the Stock Consideration will equal 1.324 shares of FNB Common Stock
for each outstanding share of SWVA Common Stock, and the Cash Consideration will
be $20.25.

         The Market  Value of FNB Common  Stock will be the  average of the last
reported  sales  prices per share of FNB Common  Stock as reported on the NASDAQ
Exchange  Composite  Transactions  Tape (as reported in The Wall Street Journal,
or, if not reported thereby,  another authoritative source as chosen by FNB) for
the thirty  consecutive  full trading days on such exchange  (even if FNB Common
Stock  does not trade in each such day)  ending at the close of  trading  on the
tenth  calendar  day  before  the  Effective  Date (the  "Market  Value" and the
"Measurement  Period").  The ratio of shares of FNB's  Common Stock that will be
exchanged for each  outstanding  share of SWVA Common Stock shall be referred to
herein as the  "Exchange  Ratio" and shall be rounded to the nearest  thousandth
decimal point.

         2.2   Allocation.  Notwithstanding anything in this Agreement to the
contrary,  the aggregate  amount of cash to be issued to shareholders of SWVA in
the Merger shall be equal to $1,785,742 (the "Cash  Amount");  provided that the
Cash  Amount may be changed by FNB to  accommodate  the  exercise  by FNB of its
option to change  the Cash  Number  and the Stock  Number  pursuant  to the last
sentence of this Section 2.2. As used in this  Agreement,  the Cash Number shall
mean the  aggregate  number of shares of SWVA Common Stock to be converted  into
the right to receive the Cash Consideration in the Merger,  which shall be equal
to the Cash Amount divided by $20.25.  The number of shares of SWVA Common Stock
to be  converted  into the right to  receive  Stock  Consideration  (the  "Stock
Number")  will be equal to (i) the number of shares of SWVA Common  Stock issued
and outstanding  immediately prior to the Effective Date of the Merger less (ii)
the sum of (A) the Cash  Number and (B) the  aggregate  number of shares of SWVA
Common  Stock to be exchanged  for cash  pursuant to Section 3.3. FNB shall have
the option to change the Cash Number and the Stock Number to more closely follow
the actual elections of SWVA shareholders pursuant to this Article 2, so long as
such  modification  to the Cash Number and the Stock Number does not prevent the
condition set forth in Section 7.1(d) from being satisfied.


                                       4
<PAGE>

         2.3 Election.  Subject to allocation in accordance  with the provisions
of this  Article,  each record  holder of shares of SWVA Common Stock issued and
outstanding  immediately  prior to the Election  Deadline (as defined in Section
3.1(i))  will be  entitled,  in  accordance  with  Section  3.1, (i) to elect to
receive in respect of each such share held in such manner (A) Cash Consideration
(a "Cash Election") or (B) Stock Consideration (a "Stock Election") thus, making
an election for all Cash Consideration,  all Stock  Consideration,  or a mixture
thereof or (ii) to indicate  that such record holder has no preference as to the
receipt of Cash Consideration or Stock Consideration for all such shares held by
such holder (a "Non-Election").  Shares of SWVA Common Stock in respect of which
a  Non-Election  is made  or as to  which  no  election  is made  (collectively,
"Non-Election  Shares")  shall be deemed by FNB to be shares in respect of which
Cash  Elections  or Stock  Elections  have been  made,  as FNB shall  determine.
Holders  of  record  of shares  of SWVA  Common  Stock  who hold such  shares as
nominees,  trustees or in other  representative  capacities (a "Representative")
may submit  multiple Forms of Election (as hereinafter  defined),  provided that
each such Form of Election  covers all the shares of SWVA  Common  Stock held by
that Representative for a particular beneficial owner.

         2.4 Allocation of Cash Election Shares. In the event that the aggregate
number of shares in respect of which  Cash  Elections  have been made (the "Cash
Election  Shares")  exceeds the Cash Number,  all shares of SWVA Common Stock in
respect of which Stock  Elections have been made (the "Stock  Election  Shares")
and all  Non-Election  Shares will be converted  into the right to receive Stock
Consideration  (and cash in lieu of  fractional  interests  in  accordance  with
Section  3.3),  and Cash  Election  Shares will be  converted  into the right to
receive Cash Consideration or Stock Consideration in the following manner:

                  (i) the number of Cash Election Shares covered by each Form of
                  Election (as defined in Section  3.1(i)) to be converted  into
                  Cash  Consideration  will be  determined  by  multiplying  the
                  number  of  Cash  Election  Shares  covered  by  such  Form of
                  Election by a fraction, (A) the numerator of which is the Cash
                  Number  and (B) the  denominator  of  which  is the  aggregate
                  number of Cash  Election  Shares  rounded  down to the nearest
                  whole number; and

                  (ii)  all  Cash  Election   Shares  not  converted  into  Cash
                  Consideration  in  accordance  with  Section  2.4(i)  will  be
                  converted into the right to receive Stock  Consideration  (and
                  cash  in lieu  of  fractional  interests  in  accordance  with
                  Section 3.3).

Provided, however, that cash in lieu of fractional interests and cash to be paid
in connection  with rights of dissenting  shareholders,  as provided in Sections
3.3 and 3.5, respectively, shall not be included in any determination of whether
this Section 2.4 shall be given effect.

                                       5
<PAGE>

         2.5  Allocation  of  Stock  Election  Shares.  In the  event  that  the
aggregate  number of Stock Election  Shares  exceeds the Stock Number,  all Cash
Election Shares and all Non-Election Shares (together,  the " Cash Shares") will
be  converted  into the  right to  receive  Cash  Consideration,  and all  Stock
Election  Shares will be converted into the right to receive Cash  Consideration
or Stock Consideration in the following manner:

                  (i) the number of Stock  Election  Shares covered by each Form
                  of Election to be converted  into Cash  Consideration  will be
                  determined by multiplying  the number of Stock Election Shares
                  covered  by  such  Form of  Election  by a  fraction,  (A) the
                  numerator  of which is the Cash Number less the number of Cash
                  Shares  and (B) the  denominator  of  which  is the  aggregate
                  number of Stock Election  Shares,  rounded down to the nearest
                  whole number; and

                  (ii)  all  Stock  Election  Shares  not  converted  into  Cash
                  Consideration  in  accordance  with  Section  2.5(i)  will  be
                  converted into the right to receive Stock  Consideration  (and
                  cash  in lieu  of  fractional  interests  in  accordance  with
                  Section 3.3).

         2.6 No  Allocation.  In the event that neither  Section 2.4 nor Section
2.5 is applicable,  all Cash Election Shares will be converted into the right to
receive Cash Consideration, all Stock Election Shares will be converted into the
right to receive Stock  Consideration (and cash in lieu of fractional  interests
in accordance with Section 3.3) and  Non-Election  Shares will be converted into
the right to receive Cash Consideration or Stock Consideration (and cash in lieu
of fractional  interests in accordance  with Section 3.3) as the Exchange  Agent
shall determine.

         2.7  Computations.  The Exchange  Agent (as defined in Section  3.1(i))
will make all computations to give effect to this Article 2.

         2.8 Cancellation of Shares. As of the Effective Date of the Merger, all
such shares of SWVA Common Stock will no longer be outstanding and automatically
be  cancelled  and  retired  and  will  cease  to exist  and  each  holder  of a
certificate formerly  representing any such shares of SWVA Common Stock (a "SWVA
Certificate")  will cease to have any rights with  respect  thereto,  except the
right  to  receive  Merger  Consideration  and  any  additional  cash in lieu of
fractional  shares of FNB  Common  Stock to be  issued or paid in  consideration
therefor upon surrender of such SWVA  Certificate in accordance  with Article 3,
without interest, subject to rights of dissenting shareholders as provided under
Section 3.5.

                                       6
<PAGE>

                                    ARTICLE 3
                               Manner of Exchange

         3.1      Exchange Procedures.

                  (i) Not more than 45 days nor fewer  than 30 days prior to the
                  Effective  Date,   First  National,   as  the  exchange  agent
                  ("Exchange Agent"), will mail a form of election (the "Form of
                  Election")  to  each  shareholder  of  record  of SWVA as of a
                  record date as close as practicable to the date of mailing and
                  mutually  agreed to by SWVA and FNB. The Exchange  Agent shall
                  enter into a written agreement with FNB and SWVA detailing its
                  duties and  responsibilities  and shall  furnish  evidence  of
                  liability   insurance   for   such   activities   in  a   form
                  substantially similar to Exhibit B. In addition,  the Exchange
                  Agent will use its best  efforts to make the Form of  Election
                  available  to the  persons  who  become  shareholders  of SWVA
                  during the period  between such record date and the  Effective
                  Date. Any election to receive Merger  Consideration  will have
                  been  properly  made only if the  Exchange  Agent  shall  have
                  received on the fifth business day  immediately  preceding the
                  Effective Date (the "Election  Deadline"),  a Form of Election
                  properly  completed  and  accompanied  by a  SWVA  Certificate
                  ("Certificate(s)")  for  the  shares  to  which  such  Form of
                  Election relates, acceptable for transfer on the books of SWVA
                  (or an  appropriate  guarantee of  delivery),  as set forth in
                  such Form of  Election.  An  election  may be revoked  only by
                  written  notice  received by the Exchange  Agent prior to 5:00
                  p.m. on the Election  Deadline.  If an election is so revoked,
                  the Certificate(s) (or guarantee of delivery,  as appropriate)
                  to which such  election  relates will be promptly  returned to
                  the person submitting the same to the Exchange Agent.

                  (ii) As soon as  reasonably  practicable  after the  Effective
                  Date, the Exchange Agent will mail to each holder of record of
                  a  Certificate,   whose  shares  of  SWVA  Common  Stock  were
                  converted into the right to receive Merger  Consideration  and
                  those  who  failed  to  return a  properly  completed  Form of
                  Election, (i) a letter of transmittal (which will specify that
                  delivery  will be effected,  and risk of loss and title to the
                  Certificates will pass, only upon delivery of the Certificates
                  to the  Exchange  Agent and will be in such form and have such
                  other provisions as the Exchange Agent may specify  consistent
                  with  this  Agreement)  and  (ii)   instructions  for  use  in
                  effecting  the surrender of the  Certificates  in exchange for
                  the Merger Consideration.

                  (iii) With respect to properly  made  elections in  accordance
                  with Section  3.1(i),  and upon  surrender in accordance  with
                  Section  3.1(ii)  of a  Certificate  for  cancellation  to the
                  Exchange Agent, together with such letter of transmittal, duly
                  executed,  and  such  other  documents  as may

                                       7
<PAGE>

                    reasonably be required by the Exchange Agent,  the holder of
                    such  Certificate  will be  entitled  to receive in exchange
                    therefor the Merger  Consideration  that such holder has the
                    right to receive  pursuant to the  provisions  of Article 2,
                    and  the  Certificate  so  surrendered   will  forthwith  be
                    canceled.  In the event of a transfer of ownership of Shares
                    that are not registered in the transfer  records of SWVA, as
                    the case may be,  payment  may be issued  to a person  other
                    than the person in whose name the Certificate so surrendered
                    is registered if such  Certificate  is properly  endorsed or
                    otherwise  in  proper  form  for  transfer  and  the  person
                    requesting  such  issuance  pays any transfer or other taxes
                    required  by reason of such  payment to a person  other than
                    the registered  holder of such Certificate or establishes to
                    the  satisfaction  of FNB that  such tax has been paid or is
                    not  applicable.  Until  surrendered as contemplated by this
                    Section  3.1,  each  Certificate  will be deemed at any time
                    after  the  Effective  Date to  represent  only the right to
                    receive upon such  surrender the Merger  Consideration  that
                    the  holder  thereof  has the right to receive in respect of
                    such Certificate pursuant to the provisions of Article 2. No
                    interest  will be paid or will accrue on any cash payable to
                    holders  of  Certificates  pursuant  to  the  provisions  of
                    Article 2.

         3.2 Distributions  with Respect to Unexchanged  Shares. No dividends or
other  distributions  with  respect  to the shares of SWVA  Common  Stock with a
record  date  after  the  Effective  Date  shall  be paid to the  holder  of any
unsurrendered  Certificate  with  respect  to the  shares of SWVA  Common  Stock
represented  thereby, and no cash payment in lieu of any fractional shares shall
be paid to any such  holder  pursuant to Section  3.3.  Subject to the effect of
unclaimed  property,  escheat and other applicable laws,  following surrender of
any such  Certificate,  there  shall be paid to the  holder  of the  Certificate
representing  whole  shares of SWVA Common  Stock  issued in exchange  therefor,
without  interest,  (i) at the time of such  surrender,  the  amount of any cash
payable in lieu of a fractional  share of SWVA Common Stock to which such holder
is entitled  pursuant to Section  3.3, and (ii) the amount of dividends or other
distributions, if any, with a record date after the Effective Date.

         3.3 No Fractional Securities. No FNB Certificates or scrip representing
fractional  shares of FNB Common  Stock shall be issued upon the  surrender  for
exchange of Certificates, and such fractional shares shall not entitle the owner
thereof to vote or to any other rights of a holder of FNB Common Stock. A holder
of Shares  converted in the Merger who would  otherwise  have been entitled to a
fractional share of FNB Common Stock shall be entitled to receive a cash payment
(without  interest) in lieu of such fractional share in an amount  determined by
multiplying  (i) the  fractional  share  interest  to which  such  holder  would
otherwise be entitled by (ii) the Market Value of FNB Common Stock.

         3.4 Certain  Adjustments.  If, after the date hereof and on or prior to
the Closing Date, the  outstanding  shares of SWVA Common Stock shall be changed
into a

                                       8
<PAGE>

different number of shares by reason of any reclassification,  recapitalization,
split-up, combination or exchange of shares, or any dividend payable in stock or
other securities is declared  thereon with a record date within such period,  or
any  similar  event  shall  occur,  the Merger  Consideration  will be  adjusted
accordingly  to provide to the holders of SWVA Common Stock,  respectively,  the
same  economic   effect  as   contemplated  by  this  Agreement  prior  to  such
reclassification,  recapitalization, split-up, combination, exchange or dividend
or similar event.

         3.5 Rights of Dissenting Shareholders.  Shareholders of SWVA who object
to the Merger will be entitled to the rights and  remedies set forth in sections
13.1-729 through 13.1-741 of the Virginia Stock Corporation Act.

                                    ARTICLE 4
                          Representation and Warranties

         4.1  Representations  and  Warranties  of  SWVA.  SWVA  represents  and
warrants to FNB as follows:

              (a)  Organization,  Standing and Power.  (1) SWVA is a corporation
duly  organized,  validly  existing  and in  good  standing  under  the  laws of
Virginia.  It has all  requisite  corporate  power and authority to carry on its
business as now being  conducted  and to own and operate its assets,  properties
and  business,  and SWVA has the  corporate  power and  authority to execute and
deliver this  Agreement and perform the  respective  terms of this Agreement and
Plan of Merger.  SWVA is duly  registered as a unitary  savings and loan holding
company under the 12 U.S.C.ss. 1467a. SVSB is the only subsidiary of SWVA and is
wholly-owned  by it, and is a federal  savings  bank,  duly  organized,  validly
existing  and in good  standing  under  the  laws of the  United  States,  is in
compliance in all material  respects with all rules and regulations  promulgated
by any relevant  regulatory  authority,  has all requisite  corporate  power and
authority to carry on its business as now being conducted and to own and operate
its assets,  properties  and  business,  is an "insured  bank" as defined in the
Federal Deposit  Insurance Act and applicable  regulations  thereunder,  and its
deposits are insured to the fullest extent allowed by law by the Federal Deposit
Insurance Corporation.

                 (2)      Except as Previously Disclosed,  neither SWVA nor SVSB
(collectively with SWVA, the "SWVA Companies") owns any equity securities of any
other corporation or entity.

         (b) Authority. (1) The execution and delivery of this Agreement and the
Plan of Merger and the  consummation  of the Merger  have been duly and  validly
authorized by all  necessary  corporate  action on the part of SWVA,  except the
approval  of  shareholders.  The  Agreement  has  been  approved  by  more  than
two-thirds of SWVA's Board of Directors and  represents  the legal,  valid,  and
binding  obligation of SWVA,  enforceable  against SWVA in  accordance  with its
terms (except in all such cases as  enforceability  may be limited by applicable
bankruptcy,  insolvency,  merger,  moratorium

                                       9
<PAGE>

or similar laws  affecting the  enforcement of creditors'  rights  generally and
except that the availability of the equitable remedy of specific  performance or
injunctive  relief is subject to the  discretion  of the court  before which any
proceeding may be brought).

                 (2) Neither the execution and delivery of  the  Agreement,  the
consummation of the  transactions  contemplated  therein,  nor the compliance by
SWVA with any of the  provisions  thereof will (i) conflict  with or result in a
breach of any provision of the Articles of Incorporation or Bylaws of SWVA, (ii)
except as Previously Disclosed,  constitute or result in the breach of any term,
condition or provision  of, or  constitute  default  under,  or give rise to any
right of termination, cancellation or acceleration with respect to, or result in
the creation of any lien,  charge or encumbrance upon, any property or assets of
the SWVA Companies pursuant to (A) any note, bond, mortgage,  indenture,  or (B)
any material  license,  agreement,  lease or other instrument or obligation,  to
which  any of the SWVA  Companies  is a party or by which  any of them or any of
their  properties or assets may be bound, or (iii) subject to the receipt of the
requisite  approvals  referred  to in Section  4.7,  violate  any  order,  writ,
injunction,  decree,  statute,  rule or regulation applicable to any of the SWVA
Companies or any of their properties or assets.

         (c) Capital Structure. The authorized capital stock of SWVA consists of
2,225,000  shares  of common  stock,  par value  $0.10 per share  ("SWVA  Common
Stock"),  of which 423,612 shares (including 4,328 shares held by the Management
Stock Bonus Plan of SVSB,  which have not been  awarded  under such plan and for
which a Cash Election shall be made) are issued and outstanding,  fully paid and
nonassessable,  not subject to shareholder  preemptive rights, and not issued in
violation of any  agreement to which SWVA is a party or otherwise  bound,  or of
any registration or qualification  provisions of any federal or state securities
laws outstanding options to purchase 64,049 shares of SWVA Common Stock; 275,000
shares of preferred stock,  par value $0.10 per share ("SWVA Preferred  Stock"),
none of which shares are issued and outstanding. Except as Previously Disclosed,
there are no outstanding understandings or commitments of any character pursuant
to which SWVA and any of the SWVA  Companies  could be  required  or expected to
issue shares of capital stock.

         (d) Ownership,  Capital  Structure,  and Organization of SVSB. (1) SWVA
does not own,  directly or  indirectly,  5% or more of the  outstanding  capital
stock or other voting securities of any corporation,  bank or other organization
actively engaged in business except SVSB and a service corporation  wholly-owned
by SVSB, Southwest Virginia Service Corporation,  Inc. The outstanding shares of
capital stock of SVSB have been duly authorized and are validly issued,  and are
fully  paid and  nonassessable  and all such  shares  are owned by SWVA free and
clear of all liens,  claims and encumbrances and were not issued in violation of
any  agreement or of any  regulation or  qualification  provisions of federal or
state  securities  laws. No rights are  authorized,  issued or outstanding  with
respect to the capital stock of SVSB and there are no agreements, understandings
or  commitments  relating  to the  right of SWVA to vote or to  dispose  of

                                       10
<PAGE>

said  shares.  None of the  shares of capital  stock of SVSB has been  issued in
violation of the preemptive rights of any person.

             (2) SVSB is a duly organized federal savings bank, validly existing
and in good standing under  applicable  laws.  SVSB (i) has full corporate power
and  authority  to own,  lease and  operate its  properties  and to carry on its
business as now  conducted  except  where the absence of such power or authority
would not have a material adverse effect on the financial condition,  results of
operations  or  business  of  SWVA on a  consolidated  basis,  and  (ii) is duly
qualified  to do  business  in the  states  of the  United  States  and  foreign
jurisdictions  where its  ownership or leasing of property or the conduct of its
business requires such  qualification and where failure to do qualify would have
a material adverse effect on the financial  condition,  results of operations or
business of SWVA on a consolidated basis. SVSB has all federal, state, local and
foreign  governmental  authorizations  and licenses  necessary  for it to own or
lease its  properties and assets and to carry on its business as it is now being
conducted,  except where failure to obtain such  authorization  or license would
not have a material adverse effect on its business.

         (e) Financial  Statements.  SWVA's Annual Report on Form 10-KSB for the
fiscal year ended June 30, 1999,  and all other  documents  filed or to be filed
subsequent  to June 30, 1999 under  Sections  13(a),  13(c),  14 or 15(d) of the
Securities  Exchange  Act of 1934,  as  amended  (together  with the  rules  and
regulations thereunder,  the "Exchange Act"), in the form filed with the SEC (in
each such case, the "SWVA  Financial  Statements")  did not and will not contain
any  untrue  statement  of a  material  fact or omit to  state a  material  fact
required to be stated therein or necessary to make the statements  made therein,
in light of the  circumstances  under which they were made, not misleading;  and
each of the  balance  sheets  in or  incorporated  by  reference  into  the SWVA
Financial Statements  (including the related notes and schedules thereto) fairly
presents  and will  fairly  present  the  financial  position  of the  entity or
entities to which it relates as of its date and each of the statements of income
and changes in stockholders'  equity and cash flows or equivalent  statements in
the SWVA  Financial  Statements  (including  any  related  notes  and  schedules
thereto)  fairly  presents  and will fairly  present the results of  operations,
changes in  stockholders'  equity and changes in cash flows, as the case may be,
of the entity or entities to which it relates for the periods set forth therein,
in  each  case in  accordance  with  generally  accepted  accounting  principles
consistently  applied to banks and savings and loan holding companies during the
periods  involved,  except  as may be  noted  therein,  subject  to  normal  and
recurring year-end audit adjustments in the case of unaudited statements.

         (f) Absence of  Undisclosed  Liabilities.  At June 30, 1999, and at any
subsequent  date  reflected  in such  Financial  Statements,  none  of the  SWVA
Companies  had any  obligation  or liability  (contingent  or  otherwise) of any
nature which were not  reflected in the SWVA  Financial  Statements,  except for
those which in the aggregate are immaterial or have been Previously Disclosed.

                                       11
<PAGE>

         (g) Legal  Proceedings;  Compliance  with  Laws.  Except as  Previously
Disclosed,  there are no actions, suits or proceedings instituted or pending or,
to the best knowledge of SWVA,  threatened or probable of assertion  against any
of the SWVA Companies, or against any property,  asset, interest or right of any
of them,  that are reasonably  expected to have,  either  individually or in the
aggregate,  a material  adverse  effect on the financial  condition of SWVA on a
consolidated  basis or that are  reasonably  expected  to threaten or impede the
consummation of the  transactions  contemplated  by this Agreement.  None of the
SWVA  Companies  is a party to any  agreement  or  instrument  or subject to any
judgment,  order,  writ,  injunction,  decree or rule that might  reasonably  be
expected  to have a  material  adverse  effect on the  condition  (financial  or
otherwise),  business or prospects of SWVA on a  consolidated  basis.  Except as
Previously  Disclosed,  as of the  date of  this  Agreement,  none  of the  SWVA
Companies nor any of their  properties is a party to or is subject to any order,
decree, agreement, memorandum of understanding or similar arrangement with, or a
commitment  letter or similar  submission to, any federal or state  governmental
agency or authority  charged with the  supervision  or  regulation of depository
institutions  or mortgage  lenders or engaged in the insurance of deposits which
restricts  or purports to  restrict in any  material  respect the conduct of the
business  of it or any of  its  subsidiaries  or  properties,  or in any  manner
relates to the capital,  liquidity,  credit  policies or  management  of it; and
except as Previously  Disclosed,  none of the SWVA Companies has been advised by
any such regulatory  authority that such authority is  contemplating  issuing or
requesting (or is considering the  appropriateness of issuing or requesting) any
such order, decree, agreement, memorandum of understanding, commitment letter or
similar  submission.  To the best  knowledge of SWVA,  the SWVA  Companies  have
complied  in all  material  respects  with all laws,  ordinances,  requirements,
regulations or orders applicable to its business (including  environmental laws,
ordinances, requirements, regulations or orders).

         (h)  Regulatory  Approvals.  SWVA knows of no reason why the regulatory
approvals  referred  to in Section  7.1(b)  should not be  obtained  without the
imposition of any condition of the type referred to in Section  7.1(b).  SVSB is
in  material  compliance  with  the  applicable   provisions  of  the  Community
Reinvestment Act and the regulations promulgated thereunder,  and SVSB currently
has a CRA rating of satisfactory or better.  To the knowledge of SWVA,  there is
no fact or circumstance or set of facts or  circumstances  that would cause SVSB
to fail to comply with such provisions or cause the rating of SVSB to fall below
satisfactory.

         (i) Labor  Relations.  None of the SWVA  Companies is a party to, or is
bound by any collective  bargaining  agreement,  contract or other  agreement or
understanding with a labor union or labor organization, nor is it the subject of
a proceeding  asserting that is has committed an unfair labor  practice  (within
the  meaning of the  National  Labor  Relations  Act) or seeking to compel it to
bargain with any labor  organization  as to wages and  conditions of employment,
nor is there any strike or other labor dispute  involving it, pending or, to the
best of its knowledge, threatened, nor is it aware of any activity involving its
employees  seeking to certify a  collective  bargaining  unit or engaging in any
other organizational activity.


                                       12
<PAGE>

         (j) Tax Matters. The SWVA Companies have filed all federal,  state, and
local tax returns and reports  required to be filed, and all taxes shown by such
returns to be due and payable have been paid or are  reflected as a liability in
the SWVA Financial Statements or are being contested in good faith and have been
Previously  Disclosed.  Except  to the  extent  that  liabilities  therefor  are
specifically  reflected in the SWVA Financial Statements,  there are no federal,
state or local tax liabilities of the SWVA Companies other than liabilities that
have arisen since December 31, 1999, all of which have been properly  accrued or
otherwise provided for on the books and records of the SWVA Companies. Except as
Previously  Disclosed,  no tax return or report of any of the SWVA  Companies is
under  examination by any taxing authority or the subject of any  administrative
or judicial  proceeding,  and no unpaid tax deficiency has been asserted against
any of the SWVA Companies by any taxing authority.

         (k)  Property.  Except as  disclosed  or  reserved  against in the SWVA
Financial  Statements,  all of the SWVA Companies have good and marketable title
free  and  clear of all  material  liens,  encumbrances,  charges,  defaults  or
equities of whatever  character  to all of the material  properties  and assets,
tangible or  intangible,  reflected in the SWVA  Financial  Statements  as being
owned by the SWVA  Companies as of the dates  thereof.  To the best knowledge of
SWVA, all buildings, and all fixtures,  equipment, and other property and assets
which are material to its business on a consolidated basis, held under leases or
subleases by the SWVA Companies are held under valid instruments  enforceable in
accordance  with their  respective  terms,  subject to  bankruptcy,  insolvency,
merger,   moratorium   and  similar  laws.  The   buildings,   structures,   and
appurtenances  owned, leased, or occupied by the SWVA Companies are, to the best
knowledge of SWVA, in good operating  condition,  in a state of good maintenance
and repair and (i) comply with  applicable  zoning and other  municipal laws and
regulations, and (ii) there are no defects therein.

         (l) Reports.  Since January 1, 1998,  the SWVA Companies have filed all
reports and  statements,  together with any amendments  required to be made with
respect  thereto,  that were  required  to be filed  with the SEC,  the  Federal
Reserve,  the SCC, and any other governmental or regulatory  authority or agency
having jurisdiction over their operations.

         (m) Employee Benefit Plans. (1) SWVA will deliver for FNB's review,  as
soon  as  practicable,  true  and  complete  copies  of  all  material  pension,
retirement, profit-sharing, deferred compensation, stock option, bonus, vacation
or other material incentive plans or agreements, all material medical, dental or
other health plans, all cafeteria or flexible benefits plans, all life insurance
plans and all other material  employee benefit plans or fringe benefit plans and
any related trust or other funding  instrument,  including,  without limitation,
all  "employee  benefit  plans" as that term is defined  in Section  3(3) of the
Employee Retirement Income Security Act of 1974, as amended ("ERISA"), currently
adopted,  maintained by,  sponsored in whole or in part by, or contributed to by
SWVA or SVSB for the benefit of current or former  employees,

                                       13
<PAGE>

retirees or other beneficiaries eligible to participate (collectively, the "SWVA
Benefit  Plans").  Any of the SWVA Benefit  Plans which is an "employee  pension
benefit plan," as that term is defined in Section 3(2) of ERISA,  is referred to
herein  as a  "SWVA  ERISA  Plan."  No  SWVA  Benefit  Plan  is or  has  been  a
"multiemployer plan," as defined in Section 3(37) of ERISA.

                (2) Except as Previously  Disclosed,  all SWVA Benefit Plans are
in compliance with the applicable  terms of ERISA,  the Internal Revenue Code of
1986,  as  amended  (the  "IRC")  and  any  other  applicable  laws,  rules  and
regulations  the  breach  or  violation  of which  could  result  in a  material
liability to SWVA on a consolidated  basis.  In the case of any plan intended to
be  qualified  under  IRC  Section  401,   compliance  with  such  qualification
requirements shall mean the receipt of a current, favorable determination letter
from the Internal Revenue Service based on laws changes  effective  through 1994
and operation of the plan in accordance with its terms or in accordance with any
subsequently  enacted law for which the  remedial  amendment  period has not yet
ended.

                (3)  No  SWVA  ERISA  Plan  which   is  subject  to the  minimum
funding  standards of Section 302 of ERISA or IRC Section 412 has any  "unfunded
current  liability," as that term is defined in Section  302(d)(8)(A)  of ERISA,
and the  present  fair  market  value of the  assets of any such plan which is a
"defined  benefit  plan," as that term is  defined  in  Section  3(35) of ERISA,
exceeds  the plan's  "benefit  liabilities,"  as that term is defined in Section
4001(a)(16) of ERISA,  when determined under actuarial  factors that would apply
if the plan was terminated in accordance with all applicable legal requirements.

         (n) Investment  Securities.  Except as Previously  Disclosed and except
for pledges to secure public and trust deposits and obligations under agreements
pursuant to which any of the SWVA  Companies has sold  securities  subject to an
obligation to  repurchase,  none of the investment  securities  reflected in the
SWVA Financial Statements is subject to any restriction, contractual, statutory,
or otherwise,  which would impair  materially  the ability of the holder of such
investment to dispose freely of any such investment at any time.

         (o) Certain Contracts. (1) Except as Previously Disclosed, neither SWVA
nor any  SWVA  subsidiary  is a party  to,  or is  bound  by,  (i) any  material
agreement,  arrangement  or commitment,  (ii) any agreement,  indenture or other
instrument  relating to the  borrowing of money by SWVA or SVSB or the guarantee
by SWVA or SVSB of any such  obligation,  (iii) any  agreement,  arrangement  or
commitment  relating  to the  employment  of a  consultant  or  the  employment,
election,  retention in office or severance of any present or former director or
officer, (iv) any agreement to make loans or for the provision, purchase or sale
of goods,  services or property between SWVA or SVSB and any director or officer
of SWVA or SVSB,  or any member of the  immediate  family or affiliate of any of
the  foregoing,  or (v) any  agreement  between  SWVA or SVSB and any 5% or more
shareholder  of SWVA;  in each case other than

                                       14
<PAGE>

agreements  entered into in the ordinary course of the banking  business of SWVA
or SVSB consistent with past practice.

                (2) Neither SWVA or SVSB,  nor to the  knowledge  of  SWVA,  the
other party  thereto,  is in default under any material  agreement,  commitment,
arrangement, lease, insurance policy or other instrument whether entered into in
the ordinary  course of business or otherwise,  nor has there occurred any event
that, with the lapse of time or giving of notice or both,  would constitute such
a default, other than defaults of loan agreements by borrowers from SWVA or SVSB
in the ordinary course of its business.

         (p)  Insurance.  A complete  list of all  policies  or binders of fire,
liability,  product  liability,  workmen's  compensation,  vehicular  and  other
insurance  held by or on  behalf  of the  SWVA  Companies  has  previously  been
furnished to FNB and all such policies or binders are valid and  enforceable  in
accordance  with their terms,  are in full force and effect,  and insure against
risks and liabilities to the extent and in the manner customary for the industry
and are deemed appropriate and sufficient by SWVA. The SWVA Companies are not in
default with respect to any provision contained in any such policy or binder and
have not failed to give any notice or present any claim under any such policy or
binder in due and timely fashion. None of the SWVA Companies has received notice
of  cancellation  or non-renewal of any such policy or binder.  None of the SWVA
Companies has knowledge of any inaccuracy in any  application  for such policies
or binders,  any failure to pay premiums  when due or any similar state of facts
or the  occurrence of any event that is reasonably  likely to form the basis for
any material  claim  against it not fully  covered  (except to the extent of any
applicable deductible) by the policies or binders referred to above. None of the
SWVA Companies has received  notice from any of its insurance  carriers that any
insurance  premiums will be increased  materially in the future or that any such
insurance coverage will not be available in the future on substantially the same
terms as now in effect.

         (q)  Loans,  OREO,  and  Allowance  for  Loan  Losses.  (1)  Except  as
Previously  Disclosed,  and  except for  matters  which  individually  or in the
aggregate,  do not  materially  adversely  affect  the  Merger or the  financial
condition of SWVA, to SWVA's best  knowledge  each loan reflected as an asset in
the  SWVA  Financial  Statements  or the  financial  statements  of SVSB  (i) is
evidenced by notes,  agreements,  or other evidences of  indebtedness  which are
true, genuine and what they purport to be, (ii) to the extent secured,  has been
secured by valid liens and security  interests  which have been  perfected,  and
(iii) is the legal,  valid and binding  obligation of the obligor named therein,
enforceable in accordance with its terms, subject to bankruptcy, insolvency, and
other laws of general  applicability  relating to or affecting creditors' rights
and to general equity  principles.  All loans and extensions of credit which are
subject to  regulation  of the Federal  Reserve which have been made by SWVA and
SVSB comply therewith.


                                       15
<PAGE>

                 (2) The  classification  on the books and  records  of SWVA and
SVSB  of  loans  and/or  non-performing  assets  as  nonaccrual,  troubled  debt
restructuring,  OREO or other similar  classification,  complies in all material
respects with generally accepted accounting principles and applicable regulatory
accounting principles.

                 (3) Except for liens, security interests,  claims,  charges, or
such other  encumbrances  as have been  appropriately  reserved  for in the SWVA
Financial  Statements  or are not  material,  title  to the  OREO  is  good  and
marketable,  and there are no adverse  claims or  encumbrances  on the OREO. All
title,  hazard and other  insurance  claims and  mortgage  guaranty  claims with
respect to the OREO have been timely  filed and  neither  SWVA nor SVSB has been
received any notice of denial of any such claim.

                 (4) SWVA and SVSB are in  possession  of all of the OREO or, if
any of  the  OREO  remains  occupied  by  the  mortgagor,  eviction  or  summary
proceedings  have been  commenced or rental  arrangements  providing  for market
rental rates have been agreed upon and SWVA and/or SVSB are diligently  pursuing
such  eviction of summary  proceedings  or such rental  arrangements.  Except as
Previously Disclosed,  no legal proceeding or quasi-legal  proceeding is pending
or, to the  knowledge of SWVA and SVSB,  threatened  concerning  any OREO or any
servicing  activity or omission to provide a servicing  activity with respect to
any of the OREO.

                 (5) Except as  Previously  Disclosed,  all loans made by any of
the SWVA  Companies to  facilitate  the  disposition  of OREO are  performing in
accordance with their terms.

                 (6) The  allowance  for possible  loan losses shown on the SWVA
Financial  Statements  was, and the  allowance for possible loan losses shown on
the financial statements of SWVA as of dates subsequent to the execution of this
Agreement  will  be,  in each  case as of the  dates  thereof,  adequate  in all
material respects to provide for possible losses, net of recoveries  relating to
loans previously  charged off, on loans outstanding  (including accrued interest
receivable)  of the SWVA  Companies and other  extensions  of credit  (including
letters of credit and commitments to make loans or extend credit) by SWVA.

         (r) Absence of Material Changes and Events.  Since June 30, 1999, there
has not  been  any  material  adverse  change  in the  condition  (financial  or
otherwise),  aggregate assets or liabilities, cash flow, earnings or business or
SWVA, and SWVA has conducted its business only in the ordinary course consistent
with past practice.

         (s) Statements True and Correct. None of the information supplied or to
be supplied  by SWVA for  inclusion  in the  Registration  Statement,  the Proxy
Statement/Prospectus or any other document to be filed with the SEC or any other
regulatory  authority in connection with the transactions  contemplated  hereby,
will, at the respective  time such documents are filed,  and, in the case of the
Registration Statement,  when it becomes effective and with respect to the Proxy
Statement/Prospectus,  when  first

                                       16
<PAGE>

mailed to SWVA shareholders, be false or misleading with respect to any material
fact  or omit to  state  any  material  fact  necessary  in  order  to make  the
statements   therein   not   misleading,   or,   in  the   case  of  the   Proxy
Statement/Prospectus  or any  supplement  thereto,  at  the  time  of  the  SWVA
Shareholders'  Meeting, be false or misleading with respect to any material fact
or omit to state any material  fact  necessary  to correct any  statement in any
earlier communication with respect to the solicitation of any proxy for the SWVA
Shareholders'  Meeting.  All documents that SWVA is responsible  for filing with
the SEC or any other  regulatory  authority in connection with the  transactions
contemplated  hereby will comply as to form in all  material  respects  with the
provisions of applicable  law,  including  applicable  provisions of federal and
state securities law.

         (t)  Brokers  and  Finders.  Neither  SWVA nor  SVSB,  nor any of their
respective officers,  directors or employees, has employed any broker, finder or
financial  advisor or incurred  any  liability  for any fees or  commissions  in
connection with the transactions contemplated herein, except for RP Financial.

         (u) Repurchase  Agreements.  With respect to all agreements pursuant to
which SWVA or SVSB has purchased  securities  subject to an agreement to resell,
if any, SWVA or SVSB, as the case may be, has a valid,  perfected  first lien or
security interest in the government  securities or other collateral securing the
repurchase  agreement,  and the value of such  collateral  equals or exceeds the
amount of the debt secured thereby.

         (v) Trust Accounts. SVSB does not provide trust services.

         (w) Environmental  Matters. (1) Except as Previously Disclosed,  to the
best of SWVA's  knowledge,  neither SWVA nor SVSB owns or leases any  properties
affected by toxic waste, radon gas or other hazardous  conditions or constructed
in part  with  the use of  asbestos.  Each of SWVA  and  SVSB is in  substantial
compliance with all Environmental Laws applicable to real or personal properties
in which it has a direct fee ownership or, with respect to a direct  interest as
lessee,  applicable to the leasehold  premises or, to the best knowledge of SWVA
and SVSB, the premises on which the leasehold is situated. Neither SWVA nor SVSB
has  received  any  Communication  alleging  that  SWVA  or  SVSB is not in such
compliance  and, to the best  knowledge  of SWVA and SVSB,  there are no present
circumstances  (including  Environmental Laws that have been adopted but are not
yet  effective)  that would prevent or interfere with the  continuation  of such
compliance.

                (2) There  are  no  legal,  administrative,  arbitral  or  other
claims, causes of action or governmental  investigations of any nature,  seeking
to  impose,  or that  could  result in the  imposition,  on SWVA and SVSB of any
liability arising under any Environmental Laws pending or, to the best knowledge
of SWVA and SVSB,  threatened against (A) SWVA or SVSB, (B) any person or entity
whose  liability  for any  Environmental  Claim,  SWVA or SVSB  has or may  have
retained or assumed either  contractually or by operation of law, or (C)any real
or personal property which SWVA or

                                       17
<PAGE>

SVSB  owns or  leases,  or has  been or is  judged  to have  managed  or to have
supervised or  participated  in the management of, which  liability might have a
material  adverse  effect on the  business,  financial  condition  or results of
operations  of SWVA.  SWVA and SVSB are not  subject  to any  agreement,  order,
judgment,  decree or  memorandum by or with any court,  governmental  authority,
regulatory agency or third party imposing any such liability.

                    (3) To the best  knowledge  of SWVA and  SVSB,  there are no
legal, administrative, arbitral or other proceedings, or Environmental Claims or
other claims,  causes of action or  governmental  investigations  of any nature,
seeking to impose,  or that could result in the  imposition,  on SWVA or SVSB of
any liability arising under any Environmental Laws pending or threatened against
any real or personal property in which SWVA or SVSB holds a security interest in
connection  with a loan or a loan  participation  which  liability  might have a
material  adverse  effect on the  business,  financial  condition  or results of
operations  of SWVA.  SWVA and SVSB are not  subject  to any  agreement,  order,
judgment,  decree or  memorandum by or with any court,  governmental  authority,
regulatory agency or third party imposing any such liability.

                    (4) With respect to all real and personal  property owned or
leased by SWVA or SVSB,  other than OREO,  SWVA has made available to FNB copies
of any  environmental  audits,  analyses  and  surveys  that have been  prepared
relating to such  properties.  With respect to all OREO held by SWVA or SVSB and
all real or personal  property  which SWVA or SVSB has been or is judged to have
managed or to have  supervised or  participated  in the  management of, SWVA has
made available to FNB the  information  relating to such OREO available to SWVA.
SWVA  and  SVSB  are  in   compliance   in  all  material   respects   with  all
recommendations  contained  in any  environmental  audits,  analyses and surveys
relating  to any  of  the  properties,  real  or  personal,  described  in  this
subsection (4).

                    (5)  There  are no  past  or  present  actions,  activities,
circumstances,  conditions, events or incidents,  including, without limitation,
the release,  emission,  discharge or disposal of any Materials of Environmental
Concern,  that could  reasonably  form the basis of any  Environmental  Claim or
other claim or action or  governmental  investigation  that could  result in the
imposition of any liability  arising under any  Environmental  Laws currently in
effect or adopted  but not yet  effective  against  SWVA or SVSB or against  any
person or entity whose liability for any Environmental Claim SWVA or SVSB has or
may have retained or assumed either contractually or by operation of law.

         4.2  Representations and Warranties of FNB. FNB represents and warrants
to SWVA as follows:

              a)   Organization,  Standing and Power.  (1) FNB is a  corporation
duly  organized,  validly  existing  and in  good  standing  under  the  laws of
Virginia.  It has all  requisite  corporate  power and authority to carry on its
business as now being

                                       18
<PAGE>

conducted and to own and operate its assets,  properties  and business,  and FNB
has the corporate  power and authority to execute and deliver this Agreement and
perform the respective  terms of this Agreement and Plan of Merger.  FNB is duly
registered as a bank holding company under the Bank Holding Company Act of 1956.
First  National  Bank, a wholly owned  subsidiary of FNB, is a national  banking
association,  duly  organized,  validly  existing and in good standing under the
laws of the United  States,  is in compliance in all material  respects with all
rules and regulations  promulgated by any relevant regulatory authority,  it has
all  requisite  corporate  power and  authority  to carry on its business as now
being conducted and to own and operate its assets,  properties and business,  is
an "insured bank" as defined in the Federal Deposit Insurance Act and applicable
regulations  thereunder  and its  deposits  are  insured to the  fullest  extent
allowed  by law by the Bank  Insurance  Fund of the  Federal  Deposit  Insurance
Corporation.

                 (2)   FNB has Previously Disclosed its subsidiary  corporations
(and the subsidiaries  thereof) (the "FNB Subsidiaries"  and,  collectively with
FNB,  the "FNB  Companies").  Except as  Previously  Disclosed,  none of the FNB
Companies owns any equity securities of any other corporation or entity.

         (b) Authority. (1) The execution and delivery of this Agreement and the
Plan of Merger and the  consummation  of the Merger  have been duly and  validly
authorized  by all  necessary  corporate  action on the part of FNB,  except the
approval of shareholders. The Agreement represents the legal, valid, and binding
obligation of FNB,  enforceable against FNB in accordance with its terms (except
in all such cases as  enforceability  may be limited by  applicable  bankruptcy,
insolvency,  merger,  moratorium or similar laws  affecting the  enforcement  of
creditors'  rights  generally and except that the  availability of the equitable
remedy of specific performance or injunctive relief is subject to the discretion
of the court before which any proceeding may be brought).

                 (2) Neither the execution and delivery of  the  Agreement,  the
consummation of the transactions contemplated therein, nor the compliance by FNB
with any of the provisions  thereof will (i) conflict with or result in a breach
of any provision of the Articles of  Incorporation or Bylaws of FNB, (ii) except
as  Previously  Disclosed,  constitute  or  result  in the  breach  of any term,
condition or provision  of, or  constitute  default  under,  or give rise to any
right of termination, cancellation or acceleration with respect to, or result in
the creation of any lien,  charge or encumbrance upon, any property or assets of
the FNB Companies pursuant to (A) any note, bond,  mortgage,  indenture,  or (B)
any material  license,  agreement,  lease or other instrument or obligation,  to
which  any of the FNB  Companies  is a party or by  which  any of them or any of
their  properties or assets may be bound, or (iii) subject to the receipt of the
requisite  approvals  referred  to in Section  4.7,  violate  any  order,  writ,
injunction,  decree,  statute,  rule or regulation  applicable to any of the FNB
Companies or any of their properties or assets.

         (c) Capital Structure. The authorized capital stock of FNB consists of:
10,000,000  shares  of common  stock,  par value  $5.00 per share  ("FNB  Common
Stock),  of which 4,084,172  shares are issued and  outstanding,  fully paid and

                                       19
<PAGE>

nonassessable,  not subject to shareholder  preemptive rights, and not issued in
violation of any agreement to which FNB is a party or otherwise bound, or of any
registration  or  qualification  provisions  of any federal or state  securities
laws. The shares of FNB Common Stock to be issued in exchange for shares of SWVA
Common Stock upon consummation of the Merger will have been duly authorized and,
when  issued in  accordance  with the terms of this  Agreement,  will be validly
issued, fully paid and nonassessable and subject to no preemptive rights. Except
as Previously Disclosed,  there are no outstanding understandings or commitments
of any  character  pursuant to which FNB and any of the FNB  Companies  could be
required or expected to issue shares of capital stock.

         (d)  Ownership  of  the  FNB  Subsidiaries;  Capital  Structure  of FNB
Subsidiaries;  and Organization of the FNB  Subsidiaries.  (1) FNB does not own,
directly or  indirectly,  5% or more of the  outstanding  capital stock or other
voting  securities  of any  corporation,  bank or  other  organization  actively
engaged in business except as Previously  Disclosed.  The outstanding  shares of
capital stock of each FNB Subsidiary  have been duly  authorized and are validly
issued,  and are fully paid and  nonassessable  and all such shares are owned by
FNB or an FNB Subsidiary  free and clear of all liens,  claims and  encumbrances
and were not  issued in  violation  of any  agreement  or of any  regulation  or
qualification  provisions  of federal or state  securities  laws.  No rights are
authorized,  issued or outstanding  with respect to the capital stock of any FNB
Subsidiary and there are no agreements,  understandings or commitments  relating
to the right of FNB to vote or to dispose of said shares.  None of the shares of
capital  stock  of any FNB  Subsidiary  has  been  issued  in  violation  of the
preemptive rights of any person.

                    (2) Each FNB Subsidiary is a duly  organized  corporation or
association,  validly  existing and in good standing under applicable laws. Each
FNB  Subsidiary  (i) has full  corporate  power and authority to own,  lease and
operate its  properties  and to carry on its  business as now  conducted  except
where the absence of such power or authority  would not have a material  adverse
effect on the financial condition, results of operations or business of FNB on a
consolidated  basis,  and (ii) is duly qualified to do business in the states of
the United  States and foreign  jurisdictions  where its ownership or leasing of
property or the conduct of its business  requires such  qualification  and where
failure to do qualify  would have a  material  adverse  effect on the  financial
condition,  results of  operations or business of FNB on a  consolidated  basis.
Each FNB  Subsidiary  has all  federal,  state,  local and foreign  governmental
authorizations  and licenses necessary for it to own or lease its properties and
assets and to carry on its business as it is now being  conducted,  except where
failure  to obtain  such  authorization  or  license  would not have a  material
adverse effect on the business of such FNB Subsidiary.

         (e)  Financial  Statements.  FNB's  Annual  Report on Form 10-K for the
fiscal year ended  December 31,  1999,  and all other  documents  filed or to be
filed  subsequent to December 31, 1999 under Sections 13(a),  13(c), 14 or 15(d)
of the Securities  Exchange Act of 1934, as amended (together with the rules and
regulations

                                       20
<PAGE>

thereunder,  the "Exchange  Act"),  in the form filed with the SEC (in each such
case,  the "FNB Financial  Statements")  did not and will not contain any untrue
statement  of a material  fact or omit to state a material  fact  required to be
stated therein or necessary to make the statements made therein, in light of the
circumstances  under  which  they were  made,  not  misleading;  and each of the
balance sheets in or incorporated by reference into the FNB Financial Statements
(including  the related notes and schedules  thereto)  fairly  presents and will
fairly  present  the  financial  position  of the entity or entities to which it
relates  as of its date and each of the  statements  of income  and  changes  in
stockholders'  equity  and  cash  flows  or  equivalent  statements  in the  FNB
Financial Statements  (including any related notes and schedules thereto) fairly
presents  and  will  fairly  present  the  results  of  operations,  changes  in
stockholders'  equity  and  changes  in cash  flows,  as the case may be, of the
entity or entities to which it relates  for the  periods set forth  therein,  in
each  case  in  accordance  with  generally   accepted   accounting   principles
consistently  applied to banks and bank  holding  companies  during the  periods
involved,  except  as may be noted  therein,  subject  to normal  and  recurring
year-end audit adjustments in the case of unaudited statements.

         (f) Absence of  Undisclosed  Liabilities.  At December 31, 1999, and at
any  subsequent  date reflected in such  Financial  Statements,  none of the FNB
Companies  had any  obligation  or liability  (contingent  or  otherwise) of any
nature which were not  reflected  in the FNB  Financial  Statements,  except for
those which in the aggregate are immaterial or have been Previously Disclosed.

         (g) Legal  Proceedings;  Compliance  with  Laws.  Except as  Previously
Disclosed,  there are no actions, suits or proceedings instituted or pending or,
to the best knowledge of FNB, threatened or probable of assertion against any of
the FNB Companies,  or against any property,  asset, interest or right of any of
them,  that are  reasonably  expected  to have,  either  individually  or in the
aggregate,  a material  adverse  effect on the  financial  condition of FNB on a
consolidated  basis or that are  reasonably  expected  to threaten or impede the
consummation of the transactions contemplated by this Agreement. None of the FNB
Companies is a party to any  agreement or instrument or subject to any judgment,
order,  writ,  injunction,  decree or rule that might  reasonably be expected to
have a  material  adverse  effect on the  condition  (financial  or  otherwise),
business or  prospects  of FNB on a  consolidated  basis.  Except as  Previously
Disclosed,  as of the date of this Agreement,  none of the FNB Companies nor any
of their properties is a party to or is subject to any order, decree, agreement,
memorandum of understanding or similar  arrangement with, or a commitment letter
or similar submission to, any federal or state governmental  agency or authority
charged  with the  supervision  or  regulation  of  depository  institutions  or
mortgage  lenders or engaged in the  insurance  of deposits  which  restricts or
purports to restrict in any  material  respect the conduct of the business of it
or any of its  subsidiaries  or  properties,  or in any  manner  relates  to the
capital,  liquidity,  credit  policies  or  management  of  it;  and  except  as
Previously  Disclosed,  none of the FNB  Companies  has been advised by any such
regulatory authority that such authority is contemplating  issuing or requesting
(or is considering the appropriateness of issuing or requesting) any such order,
decree,  agreement,  memorandum of  understanding,

                                       21
<PAGE>

commitment letter or similar  submission.  To the best knowledge of FNB, the FNB
Companies  have  complied in all material  respects  with all laws,  ordinances,
requirements,  regulations  or  orders  applicable  to its  business  (including
environmental laws, ordinances, requirements, regulations or orders).

         (h)  Regulatory  Approvals.  FNB knows of no reason why the  regulatory
approvals  referred  to in Section  7.1(b)  should not be  obtained  without the
imposition  of any condition of the type  referred to in Section  7.1(b).  First
National  is in  material  compliance  with  the  applicable  provisions  of the
Community Reinvestment Act and the regulations promulgated thereunder, and First
National  currently has a CRA rating of satisfactory or better. To the knowledge
of FNB, there is no fact or circumstance or set of facts or  circumstances  that
would cause First  National to fail to comply with such  provisions or cause the
rating of First National to fall below satisfactory.

         (i) Labor  Relations.  None of the FNB  Companies  is a party to, or is
bound by any collective  bargaining  agreement,  contract or other  agreement or
understanding with a labor union or labor organization, nor is it the subject of
a proceeding  asserting that is has committed an unfair labor  practice  (within
the  meaning of the  National  Labor  Relations  Act) or seeking to compel it to
bargain with any labor  organization  as to wages and  conditions of employment,
nor is there any strike or other labor dispute  involving it, pending or, to the
best of its knowledge, threatened, nor is it aware of any activity involving its
employees  seeking to certify a  collective  bargaining  unit or engaging in any
other organizational activity.

         (j) Tax Matters.  The FNB Companies have filed all federal,  state, and
local tax returns and reports  required to be filed, and all taxes shown by such
returns to be due and payable have been paid or are  reflected as a liability in
the FNB Financial  Statements or are being contested in good faith and have been
Previously  Disclosed.  Except  to the  extent  that  liabilities  therefor  are
specifically  reflected in the FNB Financial  Statements,  there are no federal,
state or local tax liabilities of the FNB Companies other than  liabilities that
have arisen since December 31, 1999, all of which have been properly  accrued or
otherwise provided for on the books and records of the FNB Companies.  Except as
Previously  Disclosed,  no tax return or report of any of the FNB  Companies  is
under  examination by any taxing authority or the subject of any  administrative
or judicial  proceeding,  and no unpaid tax deficiency has been asserted against
any of the FNB Companies by any taxing authority.

         (k)  Property.  Except as  disclosed  or  reserved  against  in the FNB
Financial  Statements,  all of the FNB Companies have good and marketable  title
free  and  clear of all  material  liens,  encumbrances,  charges,  defaults  or
equities of whatever  character  to all of the material  properties  and assets,
tangible or intangible, reflected in the FNB Financial Statements as being owned
by the FNB Companies as of the dates thereof.  To the best knowledge of FNB, all
buildings, and all fixtures,  equipment, and other property and assets which are
material to its business on a consolidated basis, held

                                       22
<PAGE>

under leases or subleases by the FNB Companies are held under valid  instruments
enforceable in accordance with their  respective  terms,  subject to bankruptcy,
insolvency, merger, moratorium and similar laws. The buildings,  structures, and
appurtenances  owned,  leased, or occupied by the FNB Companies are, to the best
knowledge of FNB, in good operating  condition,  in a state of good  maintenance
and repair and (i) comply with  applicable  zoning and other  municipal laws and
regulations, and (ii) there are no latent defects therein.

         (l) Reports.  Since January 1, 1998,  the FNB Companies  have filed all
reports and  statements,  together with any amendments  required to be made with
respect  thereto,  that were  required  to be filed  with the SEC,  the  Federal
Reserve,  the SCC, and any other governmental or regulatory  authority or agency
having jurisdiction over their operations.

         (m) Employee Benefit Plans. (1) FNB will deliver for SWVA's review,  as
soon  as  practicable,  true  and  complete  copies  of  all  material  pension,
retirement, profit-sharing, deferred compensation, stock option, bonus, vacation
or other material incentive plans or agreements, all material medical, dental or
other health plans, all cafeteria or flexible benefits plans, all life insurance
plans and all other material  employee benefit plans or fringe benefit plans and
any related trust or other funding  instrument,  including,  without limitation,
all  "employee  benefit  plans" as that term is defined  in Section  3(3) of the
Employee Retirement Income Security Act of 1974, as amended ("ERISA"), currently
adopted,  maintained by,  sponsored in whole or in part by, or contributed to by
FNB or any FNB  Subsidiary  for the  benefit  of  current  or former  employees,
retirees or other beneficiaries eligible to participate (collectively,  the "FNB
Benefit  Plans").  Any of the FNB Benefit  Plans which is an  "employee  pension
benefit plan," as that term is defined in Section 3(2) of ERISA,  is referred to
herein  as  a  "FNB  ERISA  Plan."  No  FNB  Benefit  Plan  is  or  has  been  a
"multiemployer plan," as defined in Section 3(37) of ERISA.

                   (2) Except as Previously Disclosed, all FNB Benefit Plans are
in compliance with the applicable  terms of ERISA,  the Internal Revenue Code of
1986,  as  amended  (the  "IRC")  and  any  other  applicable  laws,  rules  and
regulations  the  breach  or  violation  of which  could  result  in a  material
liability to FNB on a consolidated basis. In the case of any plan intended to be
qualified under IRC Section 401, compliance with such qualification requirements
shall mean the  receipt of a current,  favorable  determination  letter from the
Internal  Revenue  Service  based on laws  changes  effective  through  1994 and
operation of the plan in  accordance  with its terms or in  accordance  with any
subsequently  enacted law for which the  remedial  amendment  period has not yet
ended.

                   (3) No FNB ERISA Plan which is subject to the minimum funding
standards of Section 302 of ERISA or IRC Section 412 has any  "unfunded  current
liability," as that term is defined in Section  302(d)(8)(A)  of ERISA,  and the
present  fair  market  value of the  assets of any such plan which is a "defined
benefit  plan,"


                                       23
<PAGE>

as that term is defined in Section 3(35) of ERISA,  exceeds the plan's  "benefit
liabilities,"  as that term is  defined in Section  4001(a)(16)  of ERISA,  when
determined  under actuarial  factors that would apply if the plan was terminated
in accordance with all applicable legal requirements.


         (n)  Investment  Securities.  Except for  pledges to secure  public and
trust deposits and obligations under agreements pursuant to which any of the FNB
Companies has sold  securities  subject to an obligation to repurchase,  none of
the investment  securities  reflected in the FNB Financial Statements is subject
to any restriction,  contractual,  statutory,  or otherwise,  which would impair
materially the ability of the holder of such investment to dispose freely of any
such investment at any time.

         (o) Certain Contracts. (1) Except as Previously Disclosed,  neither FNB
nor  any  FNB  subsidiary  is a party  to,  or is  bound  by,  (i) any  material
agreement,  arrangement  or commitment,  (ii) any agreement,  indenture or other
instrument  relating to the  borrowing of money by FNB or any FNB  Subsidiary or
the  guarantee by FNB or any FNB  Subsidiary of any such  obligation,  (iii) any
agreement,  arrangement or commitment relating to the employment of a consultant
or the employment,  election, retention in office or severance of any present or
former  director  or  officer,  (iv)  any  agreement  to make  loans  or for the
provision,  purchase or sale of goods,  services or property  between FNB or any
FNB Subsidiary and any director or officer of FNB or any FNB Subsidiary,  or any
member of the immediate family or affiliate of any of the foregoing,  or (v) any
agreement  between FNB or any FNB Subsidiary  and any 5% or more  shareholder of
FNB; in each case other than  agreements  entered into in the ordinary course of
the banking business of FNB or a FNB Subsidiary consistent with past practice.

                    (2) Neither FNB or any FNB Subsidiary,  nor to the knowledge
of FNB, the other party  thereto,  is in default  under any material  agreement,
commitment,  arrangement,  lease,  insurance policy or other instrument  whether
entered  into in the  ordinary  course of business or  otherwise,  nor has there
occurred  any  event  that,  with the lapse of time or giving of notice or both,
would  constitute  such a default,  other than  defaults of loan  agreements  by
borrowers from FNB or a FNB Subsidiary in the ordinary course of its business.

         (p)  Insurance.  A complete  list of all  policies  or binders of fire,
liability,  product  liability,  workmen's  compensation,  vehicular  and  other
insurance  held  by or on  behalf  of the  FNB  Companies  has  previously  been
furnished to SWVA and all such policies or binders are valid and  enforceable in
accordance  with their terms,  are in full force and effect,  and insure against
risks and liabilities to the extent and in the manner customary for the industry
and are deemed  appropriate  and sufficient by FNB. The FNB Companies are not in
default with respect to any provision contained in any such policy or binder and
have not failed to give any notice or present any claim under any such policy or
binder in due and timely fashion.  None of the

                                       24
<PAGE>

FNB Companies has received  notice of  cancellation  or  non-renewal of any such
policy or binder.  None of the FNB Companies has knowledge of any  inaccuracy in
any application  for such policies or binders,  any failure to pay premiums when
due or any  similar  state of  facts  or the  occurrence  of any  event  that is
reasonably  likely to form the basis for any material claim against it not fully
covered  (except to the extent of any applicable  deductible) by the policies or
binders  referred to above.  None of the FNB Companies has received  notice from
any of its  insurance  carriers  that any  insurance  premiums will be increased
materially  in the  future  or that  any  such  insurance  coverage  will not be
available in the future on substantially the same terms as now in effect.

         (q)  Loans,  OREO,  and  Allowance  for  Loan  Losses.  (1)  Except  as
Previously  Disclosed,  and  except for  matters  which  individually  or in the
aggregate,  do not  materially  adversely  affect  the  Merger or the  financial
condition of FNB, to FNB's best knowledge each loan reflected as an asset in the
FNB Financial  Statements or the financial  statements of any FNB Subsidiary (i)
is evidenced by notes, agreements,  or other evidences of indebtedness which are
true, genuine and what they purport to be, (ii) to the extent secured,  has been
secured by valid liens and security  interests  which have been  perfected,  and
(iii) is the legal,  valid and binding  obligation of the obligor named therein,
enforceable in accordance with its terms, subject to bankruptcy, insolvency, and
other laws of general  applicability  relating to or affecting creditors' rights
and to general equity  principles.  All loans and extensions of credit which are
subject to regulation of the Federal Reserve which have been made by FNB and the
FNB Subsidiaries comply therewith.

                    (2) The  classification  on the books and records of FNB and
each FNB  Subsidiary  of  loans  and/or  non-performing  assets  as  nonaccrual,
troubled debt restructuring,  OREO or other similar classification,  complies in
all  material  respects  with  generally  accepted  accounting   principles  and
applicable regulatory accounting principles.

                   (3) Except for liens, security interests, claims, charges, or
such  other  encumbrances  as have been  appropriately  reserved  for in the FNB
Financial  Statements  or are not  material,  title  to the  OREO  is  good  and
marketable,  and there are no adverse  claims or  encumbrances  on the OREO. All
title,  hazard and other  insurance  claims and  mortgage  guaranty  claims with
respect  to the  OREO  have  been  timely  filed  and  neither  FNB  nor any FNB
Subsidiary has been received any notice of denial of any such claim.

                    (4) FNB and each FNB  Subsidiary are in possession of all of
the OREO or, if any of the OREO remains  occupied by the mortgagor,  eviction or
summary  proceedings  have been commenced or rental  arrangements  providing for
market rental rates have been agreed upon and FNB and/or each FNB Subsidiary are
diligently  pursuing  such  eviction  of  summary  proceedings  or  such  rental
arrangements. Except as Previously Disclosed, no legal proceeding or quasi-legal
proceeding  is  pending  or, to the  knowledge  of FNB and each FNB  Subsidiary,
threatened  concerning any OREO or any servicing activity or omission to provide
a servicing activity with respect to any of the OREO.

                                       25
<PAGE>

                   (5)      Except as Previously  Disclosed,  all loans made  by
any of the FNB Companies to facilitate the disposition of OREO are performing in
accordance with their terms.

                   (6) The  allowance for possible loan losses shown on the  FNB
Financial  Statements  was, and the  allowance for possible loan losses shown on
the financial  statements of FNB as of dates subsequent to the execution of this
Agreement  will  be,  in each  case as of the  dates  thereof,  adequate  in all
material respects to provide for possible losses, net of recoveries  relating to
loans previously  charged off, on loans outstanding  (including accrued interest
receivable)  of the FNB  Companies  and other  extensions  of credit  (including
letters of credit and commitments to make loans or extend credit) by FNB.

         (r) Absence of Material  Changes and Events.  Since  December 31, 1999,
there has not been any material  adverse  change in the condition  (financial or
otherwise),  aggregate assets or liabilities, cash flow, earnings or business or
FNB, and FNB has conducted its business only in the ordinary  course  consistent
with past practice.

         (s) Statements True and Correct. None of the information supplied or to
be  supplied  by FNB for  inclusion  in the  Registration  Statement,  the Proxy
Statement/Prospectus or any other document to be filed with the SEC or any other
regulatory  authority in connection with the transactions  contemplated  hereby,
will, at the respective  time such documents are filed,  and, in the case of the
Registration Statement,  when it becomes effective and with respect to the Proxy
Statement/Prospectus,  when  first  mailed  to SWVA  shareholders,  be  false or
misleading  with respect to any material fact or omit to state any material fact
necessary in order to make the  statements  therein not  misleading,  or, in the
case of the Proxy Statement/Prospectus or any supplement thereto, at the time of
the SWVA  Shareholders'  Meeting,  be false or  misleading  with  respect to any
material  fact or omit to state any  material  fact  necessary  to  correct  any
statement in any earlier  communication  with respect to the solicitation of any
proxy for the SWVA Shareholders'  Meeting. All documents that FNB is responsible
for filing with the SEC or any other regulatory authority in connection with the
transactions contemplated hereby will comply as to form in all material respects
with the  provisions  of  applicable  law,  including  applicable  provisions of
federal and state securities law.

         (t) Brokers and Finders. Neither FNB nor any FNB Subsidiary, nor any of
their  respective  officers,  directors or  employees,  has employed any broker,
finder  or  financial  advisor  or  incurred  any  liability  for  any  fees  or
commissions in connection with the transactions  contemplated herein, except for
The Carson Medlin Company.

         (u) Repurchase  Agreements.  With respect to all agreements pursuant to
which FNB or any FNB Subsidiary has purchased securities subject to an agreement
to resell, if any, FNB or such FNB Subsidiary,  as the case may be, has a valid,
perfected first lien or security interest in the government  securities or other
collateral securing the

                                       26
<PAGE>

repurchase  agreement,  and the value of such  collateral  equals or exceeds the
amount of the debt secured thereby.

         (v)  Administration  of Trust Accounts.  FNB and FNB Subsidiaries  have
properly  administered,  in all respects  material and which could reasonably be
expected to be material to the business,  operations  or financial  condition of
FNB and FNB  Subsidiaries,  taken as a whole, all accounts for which they act as
fiduciaries  including  but not  limited  to  accounts  for which  they serve as
trustees, agents, custodians, personal representatives,  guardians, conservators
or investment advisors,  in accordance with the terms of the governing documents
and applicable  state and federal law and regulation and common law. Neither FNB
nor a FNB  Subsidiary,  nor any  director,  officer or  employee of FNB or a FNB
Subsidiary  has committed any breach of trust with respect to any such fiduciary
account  which is material to or could  reasonably be expected to be material to
the  business,  operations or financial  condition of FNB, or a FNB  Subsidiary,
taken as a whole,  and the accountings for each such fiduciary  account are true
and correct in all material  respects and accurately  reflect the assets of such
fiduciary account in all material respects.

         (w) Environmental  Matters. (1) Except as Previously Disclosed,  to the
best of FNB's  knowledge,  neither FNB nor any FNB Subsidiary owns or leases any
properties  affected by toxic waste, radon gas or other hazardous  conditions or
constructed  in  part  with  the  use of  asbestos.  Each  of FNB  and  the  FNB
Subsidiaries is in substantial compliance with all Environmental Laws applicable
to real or personal  properties  in which it has a direct fee ownership or, with
respect to a direct interest as lessee, applicable to the leasehold premises or,
to the best knowledge of FNB and the FNB Subsidiaries, the premises on which the
leasehold  is  situated.  Neither FNB nor any FNB  Subsidiary  has  received any
Communication alleging that FNB or such FNB Subsidiary is not in such compliance
and, to the best knowledge of FNB and the FNB Subsidiaries, there are no present
circumstances  (including  Environmental Laws that have been adopted but are not
yet  effective)  that would prevent or interfere with the  continuation  of such
compliance.

                    (2) There are no legal,  administrative,  arbitral  or other
claims, causes of action or governmental  investigations of any nature,  seeking
to  impose,  or  that  could  result  in the  imposition,  on FNB  and  the  FNB
Subsidiaries of any liability arising under any  Environmental  Laws pending or,
to the best knowledge of FNB and the FNB  Subsidiaries,  threatened  against (A)
FNB or any FNB  Subsidiary,  (B) any person or entity  whose  liability  for any
Environmental  Claim,  FNB or any FNB  Subsidiary  has or may have  retained  or
assumed either  contractually or by operation of law, or (C)any real or personal
property  which  FNB or any FNB  Subsidiary  owns or  leases,  or has been or is
judged to have managed or to have  supervised or  participated in the management
of,  which  liability  might have a  material  adverse  effect on the  business,
financial   condition  or  results  of  operations  of  FNB.  FNB  and  the  FNB
Subsidiaries  are not  subject  to any  agreement,  order,  judgment,  decree or
memorandum by or with any court,  governmental  authority,  regulatory agency or
third party imposing any such liability.


                                       27
<PAGE>

                    (3) To the best  knowledge of FNB and the FNB  Subsidiaries,
there  are  no  legal,   administrative,   arbitral  or  other  proceedings,  or
Environmental  Claims  or  other  claims,   causes  of  action  or  governmental
investigations  of any nature,  seeking to impose,  or that could  result in the
imposition,  on FNB or any FNB  Subsidiary  of any  liability  arising under any
Environmental  Laws pending or threatened  against any real or personal property
in which FNB or any FNB Subsidiary holds a security  interest in connection with
a loan or a loan  participation  which liability  might have a material  adverse
effect on the business, financial condition or results of operations of FNB. FNB
and the FNB  Subsidiaries  are not subject to any  agreement,  order,  judgment,
decree or memorandum by or with any court,  governmental  authority,  regulatory
agency or third party imposing any such liability.

                    (4) With respect to all real and personal  property owned or
leased by FNB or any FNB Subsidiary,  other than OREO, FNB has made available to
SWVA copies of any  environmental  audits,  analyses  and surveys that have been
prepared  relating to such  properties.  With respect to all OREO held by FNB or
any FNB  Subsidiary  and all  real or  personal  property  which  FNB or any FNB
Subsidiary  has been or is  judged  to have  managed  or to have  supervised  or
participated  in  the  management  of,  FNB  has  made  available  to  SWVA  the
information relating to such OREO available to FNB. FNB and the FNB Subsidiaries
are in compliance in all material respects with all recommendations contained in
any  environmental  audits,   analyses  and  surveys  relating  to  any  of  the
properties, real or personal, described in this subsection (4).

                    (5)  There  are no  past  or  present  actions,  activities,
circumstances,  conditions, events or incidents,  including, without limitation,
the release,  emission,  discharge or disposal of any Materials of Environmental
Concern,  that could  reasonably  form the basis of any  Environmental  Claim or
other claim or action or  governmental  investigation  that could  result in the
imposition of any liability  arising under any  Environmental  Laws currently in
effect or adopted but not yet  effective  against FNB or any FNB  Subsidiary  or
against any person or entity whose liability for any Environmental  Claim FNB or
any FNB Subsidiary has or may have retained or assumed either  contractually  or
by operation of law.

                                    ARTICLE 5
                       Conduct Prior to the Effective Date

         5.1 Access to Records and Properties.  SWVA will keep FNB, and FNB will
keep SWVA  advised of all  material  developments  relevant to their  respective
businesses  prior to  consummation  of the Merger.  Prior to the Effective Date,
FNB,  on the one hand,  and SWVA on the other,  agree to give to the other party
reasonable  access to all the  premises  and books and  records  (including  tax
returns filed and those in preparation) of it and its  subsidiaries and to cause
its officers to furnish the other with such  financial  and  operating  data and
other information with respect to the business and properties as the other shall
from time to time  request for the  purposes of  verifying  the  warranties  and


                                       28
<PAGE>

representations set forth herein; provided, however, that any such investigation
shall be  conducted  in such manner as not to  interfere  unreasonably  with the
operation of the respective business of the other.

         5.2  Confidentiality.  Between  the  date  of  this  Agreement  and the
Effective  Date,  FNB and SWVA each will maintain in  confidence,  and cause its
directors,  officers,  employees, agents and advisors to maintain in confidence,
and not use to the  detriment  of the other party,  any  written,  oral or other
information  obtained  in  confidence  from the other  party or a third party in
connection with this Agreement or the  transactions  contemplated  hereby unless
such information is already known to such party or to others not bound by a duty
of confidentiality or unless such information becomes publicly available through
no  fault  of  such  party,  unless  use of such  information  is  necessary  or
appropriate  in making any filing or obtaining any consent or approval  required
for the  consummation  of the  transactions  contemplated  hereby or unless  the
furnishing or use of such information is required by or necessary or appropriate
in connection with legal  proceedings.  If the Merger is not  consummated,  each
party  will  return  or  destroy  as  much of such  written  information  as may
reasonably be requested.

         5.3  Registration   Statement,   Proxy  Statement  and  Shareholder
Approval.  The Board of Directors of SWVA will duly call and will hold a meeting
of its  shareholders  as soon as  practicable  for the purpose of approving  the
Merger (the "SWVA  Shareholders'  Meeting") and, subject to the fiduciary duties
of the Board of Directors of SWVA (as  determined  after  consultation  with its
counsel and as presented in writing), SWVA shall use its best efforts to solicit
and obtain  votes of the holders of its Common  Stock in favor of the Merger and
will comply with the  provisions  in its  Articles of  Incorporation  and Bylaws
relating to the call and holding of a meeting of shareholders  for such purpose;
and SWVA  shall,  at its own  discretion,  recess or adjourn the meeting if such
recess or  adjournment  is deemed by SWVA to be necessary or desirable.  FNB and
SWVA agree to cooperate in the preparation of the  Registration  Statement to be
filed by FNB with the SEC (the "Registration  Statement") in connection with the
issuance of FNB Common Stock in the Merger,  including  the proxy  statement and
other  proxy   material  of  SWVA   constituting  a  part  thereof  (the  "Proxy
Statement"),  and FNB  will  use its  best  efforts  to  have  the  Registration
Statement  declared  effective  as promptly as possible.  When the  Registration
Statement or any  post-effective  amendment or  supplement  thereto shall become
effective,  and  at  all  times  subsequent  to  such  effectiveness,  up to and
including  the  date  of  the  SWVA  Shareholders'  Meeting,  such  Registration
Statement  and all  amendments  or  supplements  thereto,  with  respect  to all
information  set forth therein  furnished or to be furnished by SWVA relating to
the SWVA Companies and by FNB relating to the FNB Companies,  (i) will comply in
all material  respects with the provisions of the Securities Act of 1933 and any
other  applicable  statutory or regulatory  requirements,  including  applicable
state  blue-sky  and  securities  laws,  and (ii) will not  contain  any  untrue
statement  of a material  fact or omit to state a material  fact  required to be
stated  therein  or  necessary  to make the  statements  contained  therein  not
misleading;  provided, however, in no event shall any party hereto be liable for
any untrue statement of a material fact or omission to state a material fact in

                                       29
<PAGE>
the  Registration  Statement  made in reliance  upon,  and in  conformity  with,
written  information  concerning  another  party  furnished  by such other party
specifically for use in the Registration Statement.

         5.4 Operation of the Business of FNB and SWVA.  From the date hereof to
the  Effective  Date,  FNB and SWVA will  operate  their  respective  businesses
substantially  as  presently  operated  and only in the  ordinary  course,  and,
consistent  with such  operation,  they will use their best  efforts to preserve
intact their  relationships  with persons  having  business  dealings with them.
Without  limiting the  generality  of the  foregoing,  and except as provided in
Section 5.12,  neither FNB nor SWVA will,  without the prior written  consent of
the other, which consent shall not be unreasonably withheld:

                  (a) Make any change in its authorized  capital stock, or issue
or sell any additional  shares of,  securities  convertible into or exchangeable
for,  or  options  (excluding  those  options  provided  for  in  the  2000  FNB
Corporation Incentive Stock Compensation Plan, but the number of such options to
be issued shall not exceed 50,000),  warrants or rights to purchase, its capital
stock, nor shall it purchase, redeem or otherwise acquire any of its outstanding
shares of capital  stock,  provided  that FNB or SWVA may issue shares of common
stock pursuant to options granted or issued prior to the date hereof and FNB may
repurchase FNB Common Stock consistent with past practices;

                  (b)  Voluntarily  make any changes in the  composition  of its
officers, directors or other key management personnel;

                  (c)  Make any change in  the  compensation  or  title  of  any
officer,  director  or  key  management  employee  or  make  any  change  in the
compensation  or title of any other  employee,  other than  permitted by current
employment  policies in the ordinary  course of business,  any of which  changes
shall be  reported  promptly to the other party  provided,  however,  that on or
before the Effective Date, SWVA may extend the term of the employment agreements
of D. W.  Shilling  and Barbara  Weddle for terms not to exceed 36 months and 12
months from the Effective Date, respectively;

                  (d)  Enter  into  any  bonus,  incentive  compensation,  stock
option,  deferred compensation,  profit sharing,  thrift,  retirement,  pension,
group insurance or other benefit plan or any employment or consulting  agreement
(excluding calendar year bonuses and 2001 Sales Incentives  consistent with past
practice);

                  (e)  Incur any  obligation or liability  (whether  absolute or
contingent, excluding suits instituted against it), make any pledge, or encumber
any of its assets, nor dispose of any of its assets in any other manner,  except
in the ordinary  course of its business and for adequate  value, or as otherwise
specifically  permitted  in  this  Agreement,   and  excluding  FHLB  borrowings
consistent with past practice;

                  (f)  Except  as permitted by Section 5.4(a)  hereof,  issue or
contract  to issue any shares of its  Common  Stock,  options  for shares of its
Common Stock, or securities exchangeable for or convertible into such shares;

                                       30
<PAGE>

                  (g)  Knowingly waive any right to substantial value;

                  (h)  Enter into material transactions otherwise  than  in  the
ordinary course of its business;

                  (i)  Alter,  amend  or  repeal  its  Bylaws  or  Articles   of
Incorporation  (excluding any amendment with respect to SVSB in order to add one
director to SVSB's Board); or

                  (j)  Propose or take any other  action  which  would make  any
representation or warranty in Section 4.1 or Section 4.2 hereof untrue.

         5.5 Dividends.  FNB and SWVA may declare and pay only regular  periodic
cash  dividends in the  ordinary  course of business  and  consistent  with past
practice  from  the date of this  Agreement  through  the  Effective  Date.  Any
dividend increase by SWVA or FNB in excess of $.01 per share must be approved by
the other.

         5.6 No  Solicitation.  Without the prior  written  consent of FNB, SWVA
shall  not,  and shall  cause its  officers,  directors,  agents,  advisors  and
affiliates not to,  solicit or encourage  inquires or proposals with respect to,
furnish any  information  relating to, or  participate  in any  negotiations  or
discussions  concerning,  an Acquisition  Transaction (as hereinafter  defined);
provided, however, that nothing contained in this Section 5.6 shall prohibit the
Board of  Directors of SWVA from  furnishing  information  to, or entering  into
discussions  or   negotiations   with,  any  person  or  entity  that  makes  an
unsolicited, written bona fide proposal regarding an Acquisition Transaction if,
and only to the extent that (A) the Board of Directors of SWVA concludes in good
faith,  after  consultation  with and  consideration  of the  written  advice of
outside counsel, that the failure to furnish such information or enter into such
discussions or negotiations would constitute a breach of its fiduciary duties to
shareholders  under  applicable  law,  and (B) the  Board of  Directors  of SWVA
concludes in good faith that the proposal regarding the Acquisition  Transaction
contains an offer of  consideration  that is superior to the  consideration  set
forth  herein.  SWVA shall  immediately  notify FNB orally and in writing of its
receipt of any such proposal or inquiry,  of the material  terms and  conditions
thereof, and, if possible, of the identity of the person making such proposal or
inquiry.  For purposes of this Agreement,  "Acquisition  Transaction"  means any
merger,  consolidation,  share exchange, joint venture,  business combination or
similar transaction or any purchase of all or any material portion of the assets
of an entity.

         5.7  Regulatory  Filings.  FNB  and  SWVA  shall  prepare  jointly  all
regulatory  filings required to consummate the transactions  contemplated by the
Agreement  and the Plan of Merger and submit the filings for  approval  with the
Federal Reserve Board and the SCC, and any other governing regulatory authority,
as soon as practicable after the date hereof.  FNB and SWVA shall use their best
efforts to obtain approvals of such filings.

                                       31

<PAGE>

         5.8 Public Announcements. Each party will consult with the other before
issuing any press release or otherwise making any public statements with respect
to the Merger and shall not issue any such press release or make any such public
statement prior to such consultations except as may be required by law.

         5.9  Notice of  Breach.  FNB and SWVA will give  written  notice to the
other promptly upon becoming aware of the impending or threatened  occurrence of
any  event   which  would   cause  or   constitute   a  breach  of  any  of  the
representations,  warranties  or  covenants  made  to the  other  party  in this
Agreement and will use its best efforts to prevent or promptly remedy the same.

         5.10 Accounting  Treatment.  FNB and SWVA  acknowledge  that the Merger
shall  be  accounted  for as a  purchase  under  generally  accepted  accounting
principles.

         5.11 Merger  Consummation.  Subject to the terms and conditions of this
Agreement, each party shall use its best efforts in good faith to take, or cause
to be taken,  all actions,  and to do or cause to be done all things  necessary,
proper or  desirable,  or  advisable  under  applicable  laws,  as  promptly  as
practicable so as to permit  consummation of the Merger at the earliest possible
date,  consistent with Section 1.5 herein, and to otherwise enable  consummation
of the transactions contemplated hereby and shall cooperate fully with the other
parties  hereto to that end, and each of FNB and SWVA shall use, and shall cause
each of their  respective  subsidiaries  to use,  its best efforts to obtain all
consents  (governmental or other) necessary or desirable for the consummation of
the transactions contemplated by this Agreement.

         5.12 FNB Acquisition  Transaction.  Nothing contained in this Agreement
shall  prevent FNB from entering into an  Acquisition  Transaction  with a third
party so long as FNB and its successors comply with the terms of the Merger with
SWVA.

         5.13  Affiliate  Agreements.  SWVA shall use its best  efforts to cause
each director,  executive officer and other person who is an "affiliate" of SWVA
under Rule 145 of the Securities  Act to deliver to FNB as soon as  practicable,
and prior to the  mailing  of the Proxy  Statement/Prospectus,  executed  letter
agreements in the form of Exhibit C attached  hereto  providing that such person
will comply with Rule 145 and will vote in favor of the Merger.

                                    ARTICLE 6
                              Additional Agreements

         6.1 Conversion of Stock Options.  (a) On the Effective Date, all rights
with respect to SWVA Common Stock  pursuant to stock  options  ("SWVA  Options")
granted by SWVA  under a SWVA stock  option  plan which are  outstanding  on the
Effective Date, whether or not they are exercisable, shall be converted into and
become rights with respect to FNB Common  Stock,  and FNB shall assume each SWVA
Option in

                                       32
<PAGE>

accordance with the terms of the stock option plan under which it was issued and
the stock option  agreement by which it is evidenced.  From the  Effective  Date
forward, (i) each SWVA Option assumed by FNB may be excised solely for shares of
FNB Common Stock,  (ii) the number of shares of FNB Common Stock subject to each
SWVA Option shall be equal to the number of shares of SWVA Common Stock  subject
to such  option  immediately  prior  to the  Effective  Date  multiplied  by the
Exchange  Ratio  and (iii) the per share  exercise  price  under  each such SWVA
Option  shall be adjusted by dividing  the per share  exercise  price under each
such  option  by the  Exchange  Ratio and  rounding  down to the  nearest  cent;
provided,  however, that the terms of each SWVA Option shall, in accordance with
its terms, be subject to further  adjustment as appropriate to reflect any stock
split, stock dividend,  recapitalization  or other similar transaction after the
Effective Date. It is intended that the foregoing assumption shall be undertaken
in a manner that will not constitute a "modification"  as defined in Section 425
of the Code, as to any stock option which is an "incentive stock option." Shares
of FNB Common Stock  issuable  upon exercise of SWVA Options shall be covered by
an  effective  registration  statement  on  Form  S-8,  and  FNB  shall  use its
reasonable  best efforts to file a  registration  statement on Form S-8 covering
such shares as soon as possible after the Effective  Date,  but in no event,  no
later than 30 days after the Effective Date.

         6.2  Benefit Plans.

                  (a)  Effective  with  the  consummation  of  the  Merger,  the
Management Stock Bonus Plan of SVSB shall be terminated and all unawarded shares
(and the Merger Consideration  attributable thereto) shall be forfeited to SVSB.
In addition, the SVSB ESOP (as defined in Section 6.2(c)) shall be continued and
then merged as provided  Section 6.2(c) below, the SVSB Defined Benefit Plan (as
defined in Section  6.2(d)) shall be continued  and then  terminated as provided
Section  6.2(d) below,  and  participation  in the FNB 401(k) plan shall be made
available to SVSB employees as provided Section 6.2(e) below.  Otherwise,  after
consummation of the Merger, at the option of FNB (which may be applied on a plan
or  program  by plan or  program  basis)  and  subject  to FNB's  best  efforts,
employees of SWVA and SVSB shall be entitled to participate either (x) in one or
more combined plans or programs of FNB and SWVA on substantially  the same basis
as similarly  situated  employees of FNB or First National  (taking into account
all  applicable  factors,  including  but not  limited to  position,  employment
classification,  age, length of service, pay, part time or full time status, and
the like, as well as changes made in such plans and programs in the future),  or
(y) in plans and programs which,  subject to changes required by applicable laws
or by limitations imposed by insurance  companies  providing plan benefits,  are
comparable  to  (or  a  continuation  of),  and  provide  for  participation  on
substantially  the same basis,  as SWVA's  employee  benefit  plans and programs
currently in effect. If and to the extent option (x) is effectuated:

                    (1) (A)  Coverage  under FNB's plans and  programs  shall be
available to each  employee of SWVA and SVSB and his or her  dependents  without
regard to any waiting period, evidence or requirement of insurability,  actively
at work requirement or preexisting  condition exclusion or limitation (except to
the extent and in

                                       33
<PAGE>

the manner any such waiting  period,  evidence or requirement  of  insurability,
actively at work requirement or exclusion or limitation applies to such employee
or  dependents  immediately  prior to the  effectuation  of option  (x)) and (B)
amounts paid or payable by employees for health care expenses for the portion of
the annual  benefit  period  prior to the date as of which  option  (x)  becomes
effective shall be credited in  satisfaction  of any deductible  requirement and
any  out-of-pocket  limit for the  balance of the annual  benefit  period  which
includes such date.

                    (2) FNB shall  treat  service  with SWVA and SVSB before the
consummation  of the Merger as service with FNB for purposes of  eligibility  to
begin participation and vesting (but not benefit accruals, except in the case of
a  continuation  of any plan  maintained  by SWVA or SVSB) for  purposes  of all
employee  benefit and  seniority  based plans and  programs,  including  but not
limited to annual,  sick and personal leave accruing  following the consummation
of the Merger.

Nothing  contained  in this  Section  is  intended  to provide  any third  party
beneficiary rights in any current or former employee, or any spouse or dependent
thereof, of SWVA, SVSB, FNB or any FNB Subsidiary,  except as otherwise required
by ERISA or other  applicable  law  (determined  without  regard to third  party
beneficiary contract law).

                  (b)  Except  to  extent  individually  negotiated  replacement
contracts  or  settlement  agreements  are  entered  into,  FNB shall  honor all
employment severance, consulting and other compensation contracts and agreements
Previously  Disclosed  and  executed  in writing by SWVA on the one hand and any
individual current or former director,  officer or employee thereof on the other
hand, copies of which have been previously delivered by SWVA to FNB.

                  (c)  As of the Effective Date, all SWVA and SVSB employees who
are  participants  in the SVSB Employee  Stock  Ownership Plan (the "SVSB ESOP")
shall be fully vested in their  accrued  benefits  under the SVSB ESOP,  and the
SVSB ESOP shall be  continued  and shall be merged into the FNB  Employee  Stock
Ownership Plan no later than two years after the Merger,  with  participation in
the FNB Employee Stock Ownership Plan extended to eligible  employees of SVSB as
of the time of such plan  merger.  FNB shall  treat  service  with SWVA and SVSB
before  the  consummation  of the  Merger as service  with FNB for  purposes  of
eligibility to begin participation, vesting and future benefit accrual under its
Employee Stock Ownership Plan.

                  (d)  As of the Effective Date, all SWVA and SVSB employees who
are  participants  in the SWVA  defined  benefit  plan  maintained  through  the
Financial  Institutions  Retirement Fund (the "SWVA Defined Benefit Plan") shall
be fully vested in their accrued  benefits under the SWVA Defined  Benefit Plan,
and all necessary steps shall be taken to cause the SWVA Defined Benefit Plan to
be terminated no later than the end of its plan year in which the Merger occurs,
in accordance  with  applicable  law. If the SWVA Defined  Benefit Plan is fully
funded on  termination,  any funding  surplus shall be

                                       34
<PAGE>

used to increase  accrued benefits on a basis which is  nondiscriminatory  under
the IRC in a manner mutually agreeable to FNB, SWVA and SVSB.

                  (e)  Effective  no later than the  beginning of the first plan
year of FNB's 401(k) plan commencing after the effective date of the termination
of the SWVA Defined  Benefit Plan,  FNB shall make  participation  in its 401(k)
plan  available to the eligible  employees of SWVB. FNB shall treat service with
SWVA and SVSB  before the  consummation  of the  Merger as service  with FNB for
purposes of  eligibility  to begin  participation,  vesting  and future  benefit
accrual under its 401(k) plan.

         6.3 Indemnification.  Following the Effective Date, FNB shall indemnify
and hold harmless any person who has rights to indemnification from SWVA, to the
maximum  extent  permitted  under  Virginia  law and in  accordance  with SWVA's
Articles of Incorporation or Bylaws, as in effect on the date of this Agreement,
to the extent legally  permitted to do so, with respect to matters  occurring on
or prior to the Effective  Date. FNB further agrees that any such person who has
rights to indemnification pursuant to this Section 6.3 is expressly made a third
party  beneficiary  of  this  Section  6.3 and may  directly,  in such  person's
personal capacity,  enforce such rights through an action at law or in equity or
through any other manner or means of redress allowable under Virginia law to the
same  extent  as if  such  person  were a party  hereto.  Without  limiting  the
foregoing, in any case in which corporate approval may be required to effectuate
any  indemnification,  FNB  shall  direct,  at the  election  of the party to be
indemnified,  that the determination of permissibility of indemnification  shall
be  made  by  independent  counsel  mutually  agreed  upon  between  FNB and the
indemnified party. Upon written application,  and in accordance with, and to the
extent permitted by, Virginia law, FNB will advance  reasonable  expenses to any
person who has rights to indemnification from SWVA. FNB shall use its reasonable
best efforts to maintain  SWVA's  existing  directors'  and officers'  liability
policy,  or some other policy,  including  FNB's existing  policy,  providing at
least comparable  coverage,  covering persons who are currently  covered by such
insurance of SWVA for a period of six years after the Effective Date on terms no
less favorable than those in effect on the date hereof.

                                    ARTICLE 7
                            Conditions to the Merger

         7.1 Conditions to Each Party's  Obligations  to Effect the Merger.  The
respective  obligations  of each of FNB and SWVA to effect  the  Merger  and the
other  transactions  contemplated  by this  Agreement  shall be  subject  to the
fulfillment  or  waiver  at or  prior  to the  Effective  Date of the  following
conditions:

                  (a)   Shareholder  Approval.  Shareholders  of SWVA shall have
approved all matters  relating to this  Agreement and the Merger  required to be
approved by such shareholders in accordance with Virginia law.


                                       35
<PAGE>

                  (b)   Regulatory  Approvals.  This  Agreement  and the Plan of
Merger shall have been approved by the Federal  Reserve,  the SCC, the Office of
Thrift Supervision and any other regulatory authority whose approval is required
for consummation of the  transactions  contemplated  hereby,  and such approvals
shall not have imposed any  condition or  requirement  which would so materially
adversely  impact  the  economic  or  business   benefits  of  the  transactions
contemplated by this Agreement as to render  inadvisable the consummation of the
Merger in the reasonable opinion of the Board of Directors of FNB or SWVA.

                  (c)   Registration   Statement.  The   Registration  Statement
shall have been  declared  effective and shall not be subject to a stop order or
any threatened stop order.

                  (d)   Tax  Opinion.  FNB  and  SWVA  shall  have  received  an
opinion of Mays & Valentine, L.L.P., or other counsel reasonably satisfactory to
FNB and SWVA, to the effect that the Merger will  constitute a merger within the
meaning of Section  368 of the  Internal  Revenue  Code and that no gain or loss
will be  recognized by the  shareholders  of SWVA to the extent they receive FNB
Common Stock solely in exchange for their SWVA Common Stock in the Merger.

                  (e)    Opinions of Counsel.  SWVA shall have  delivered to FNB
and FNB shall  have  delivered  to SWVA  opinions  of  counsel,  dated as of the
Effective  Date,  as to such  matters as they may each  reasonably  request with
respect  to  the  transactions  contemplated  by  this  Agreement  and in a form
reasonably acceptable to each of them.

                  (f)    Legal  Proceedings.  Neither  FNB  nor  SWVA  shall  be
subject to any order,  decree or  injunction  of a court or agency of  competent
jurisdiction which enjoins or prohibits the consummation of the Merger.

                  (g)    Amendment  of SVSB ESOP.  Prior to Merger,  SVSB  shall
have  amended  the SVSB ESOP (as  defined in Section  6.2(c)) to  eliminate  the
provision  thereof  (i.e.,   section  8.2(c))  requiring   satisfaction  of  any
acquisition  loan,   allocation  to  participants  of  the  remaining  value  of
collateral not used to satisfy any  acquisition  loan,  and  termination of such
plan on the consummation of a transaction such as the Merger.

         7.2 Conditions to Obligations of FNB. The  obligations of FNB to effect
the  Merger  shall be subject  to the  fulfillment  or waiver at or prior to the
Effective Date of the following additional conditions:

                   (a)   Representations    and   Warranties.    Each   of   the
representations  and  warranties  contained  herein  of SWVA  shall  be true and
correct in all material  respects as of the date of this  Agreement and upon the
Effective  Date  with the same  effect as though  all such  representations  and
warranties  had  been  made on the  Effective  Date,  except  (i)  for any  such
representations  and warranties made as of a specified date, which shall be true
and correct as of such date,  (ii) as expressly  contemplated by this


                                       36
<PAGE>

Agreement, or (iii) for representations and warranties the inaccuracies of which
relate to matters that,  individually  or in the  aggregate,  do not  materially
adversely  affect  the Merger and the other  transactions  contemplated  by this
Agreement and FNB shall have received a certificate  or  certificates  signed by
the Chief  Executive  Officer  and Chief  Financial  Officer  of SWVA  dated the
Effective Date, to such effect.

                   (b) Performance of Obligations.  SWVA shall have performed in
all material respects all obligations  required to be performed by it under this
Agreement prior to the Effective Date, and FNB shall have received a certificate
signed by the Chief Executive Officer of SWVA to that effect.

         7.3  Conditions  to  Obligations  of  SWVA. The  obligations of SWVA to
effect the Merger shall be subject to the  fulfillment  or waiver at or prior to
the Effective Date of the following additional conditions:

                   (a)   Representations    and   Warranties.    Each   of   the
representations and warranties contained herein of FNB shall be true and correct
in all material respects as of the date of this Agreement and upon the Effective
Date with the same effect as though all such  representations and warranties had
been made on the Effective  date,  except (i) for any such  representations  and
warranties  made as of a specified  date,  which shall be true and correct as of
such  date,  (ii) as  expressly  contemplated  by this  Agreement,  or (iii) for
representations and warranties the inaccuracies of which relate to matters that,
individually or in the aggregate,  do not materially adversely affect the Merger
and the other  transactions  contemplated  by this Agreement and SWVA shall have
received a certificate or certificates signed by the Chief Executive Officer and
Chief Financial Officer of FNB dated the Effective Date, to such effect.

                   (b) Performance of  Obligations.  FNB shall have performed in
all material respects all obligations  required to be performed by it under this
Agreement  prior  to  the  Effective  Date,  and  SWVA  shall  have  received  a
certificate signed by Chief Executive Officer of FNB to that effect.

                   (c)  Investment  Banking  Letter.  SWVA shall have received a
written  opinion in form and  substance  satisfactory  to SWVA from RP Financial
addressed to SWVA and dated the date the Proxy Statement/Prospectus is mailed to
shareholders of SWVA, to the effect that the terms of the Merger,  including the
Exchange Ratio, are fair, from a financial point of view, to SWVA.

                                    ARTICLE 8
                                   Termination

         8.1  Termination.  Notwithstanding   any   other   provision   of  this
Agreement,  and  notwithstanding  the approval of this Agreement and the Plan of
Merger by the  shareholders  of SWVA,  this  Agreement may be terminated and the
Merger abandoned at any time prior to the Effective Date:

                                       37
<PAGE>

                   (a) By the mutual  consent of the Board of  Directors of each
of FNB and SWVA;

                   (b) By the  respective  Boards of Directors of FNB or SWVA if
the  conditions  set forth in Section 7.1 have not been met or waived by FNB and
SWVA;

                   (c) By the Board of  Directors of FNB if the  conditions  set
forth in Section 7.2 have not been met or waived by FNB;

                   (d) By the Board of Directors of SWVA if the  conditions  set
forth in Section 7.3 have not been met or waived by SWVA;

                   (e) By the respective  Boards of Directors FNB or SWVA if the
Merger is not consummated by June 1, 2001.

                   (f) By the Board of Directors of SWVA,  within five  business
days after the end of the Measurement Period (as defined in Section 2.1), if the
Market Value (as defined in Section 2.1) is less than $14.00; provided, however,
that if within  five  calendar  days  after  receipt  of  notice of  termination
pursuant to this paragraph  8.1(f),  FNB provides written notice to SWVA that it
shall  increase  the  Exchange  Ratio  to an  amount  (rounded  to  the  nearest
one-thousandth)  so as to  provide  the same Stock  Consideration  that would be
received  were the Market  Value  equal to $14.00  per  share,  in which case no
termination shall be deemed to have occurred pursuant to this Section 8.1(f) and
this  Agreement  shall  remain in full force and effect in  accordance  with its
terms (except the Exchange Ratio shall have been so modified).

                  (g)  By the Board of  Directors of FNB,  within five  business
days after the end of the Measurement Period (as defined in Section 2.1), if the
Market  Value (as  defined in Section  2.1) is greater  than  $20.00;  provided,
however,  that  if  within  five  calendar  days  after  receipt  of  notice  of
termination  pursuant to this paragraph 8.1(g),  SWVA provides written notice to
FNB that it will agree to decrease the Exchange  Ratio to an amount  (rounded to
the nearest  one-thousandth) so as to provide the same Stock  Consideration that
would be received were the Market Value equal to $20.00 per share, in which case
no termination  shall be deemed to have occurred pursuant to this Section 8.1(g)
and this Agreement  shall remain in full force and effect in accordance with its
terms  (except  the  Exchange  Ratio shall have been so  modified);  and further
provided,  however,  that (i) if the Market Value (as defined in Section 2.1) is
greater than $20.00, and (ii) FNB shall have, prior to the Effective Date of the
Merger,  publicly announced that it has agreed to a transaction in which control
of FNB will be acquired by another  entity in an  Acquisition  Transaction,  the
Board of Directors of FNB may not terminate the Merger  pursuant to this Section
8.1(g) and the Exchange Ratio shall be 1.083.

         8.2  Effect  of  Termination.  In  the  event  of  the  termination and
abandonment  of this  Agreement  and the Merger  pursuant to Section  8.1,  this
Agreement  shall  become

                                       38
<PAGE>

void and have no effect,  except  that (i) the last  sentence of Section 5.2 and
all of Sections 5.8 and 8.4 shall survive any such  termination  and abandonment
and (ii) no party shall be relieved or released from any  liability  arising out
of an intentional breach of any provision of this Agreement.

         8.3  Non-Survival  of   Representations,   Warranties    and Covenants.
Except for Sections 1.3, 1.4, Article 2, Article 3, 5.4(c),  6.2, 6.3 and 8.4 of
this  Agreement,   none  of  the  respective   representations  and  warranties,
obligations, covenants and agreements of the parties shall survive the Effective
Date, provided that no such representations,  warranties, obligations, covenants
and agreements shall be deemed to be terminated or extinguished so as to deprive
FNB or SWVA (or any director,  officer,  or controlling  person  thereof) of any
defense in law or equity which otherwise  would be available  against the claims
of  any  person,   including  without   limitation  any  shareholder  or  former
shareholder of either FNB or SWVA.

         8.4  Expenses.  The parties provide for  the  payment  of  expenses  as
follows:

                  (a)  Except as provided below,  each of the parties shall bear
and  pay  all  costs  and  expenses  incurred  by  it  in  connection  with  the
transactions  contemplated  herein,  including  fees  and  expenses  of its  own
financial  consultants,  accountants and counsel,  except that printing expenses
shall be shared equally between FNB and SWVA.

                  (b)  In the event FNB terminates  this Agreement  based on the
occurrence of a Termination  Event (as defined  below),  SWVA shall pay to FNB a
termination  fee of Two Hundred Fifty  Thousand  Dollars  ($250,000.00)  in cash
within five  business  days after written  notice of such  termination.  For the
purposes  of  this  Agreement,  a  "Termination  Event"  shall  mean  any of the
following events or transactions occurring after the date hereof:

                           (i) SWVA, without having received FNB's prior written
                  consent,  shall have entered into an agreement with any person
                  to (A)  acquire,  merger  or  consolidate,  or enter  into any
                  similar  transaction,   with  SWVA,  (B)  purchase,  lease  or
                  otherwise  acquire all or  substantially  all of the assets of
                  SWVA, or (C) purchase or otherwise  acquire directly from SWVA
                  securities  representing  10% or more of the  voting  power of
                  SWVA;

                           (ii)  any  person  shall  have  acquired   beneficial
                  ownership or the right to acquire beneficial  ownership of 20%
                  or more of the  outstanding  shares of SWVA Common Stock after
                  the date hereof (the term "beneficial  ownership" for purposes
                  of this  Agreement  having  the  meaning  assigned  thereto in
                  Section  13(d)  of  the  Exchange  Act,  and  the  regulations
                  promulgated thereunder); or


                                       39
<PAGE>

                           (iii) any person shall have made a bona fide proposal
                  to SWVA by public  announcement or written  communication that
                  is or becomes the subject of public disclosure to acquire SWVA
                  by merger, shares exchange, consolidation,  purchase of all or
                  substantially   all  of  its  assets  or  any  other   similar
                  transaction,   and  following  such  bona  fide  proposal  the
                  shareholders of SWVA vote not to approve the Agreement.

Notwithstanding  the  foregoing,  SWVA shall not be  obligated to pay to FNB the
termination  fee described in this Section  8.4(b) in the event that at or prior
to such time as such fee becomes payable (i) FNB and SWVA validly terminate this
Agreement  pursuant to Section 8.1(a),  (ii) FNB or SWVA validly terminates this
Agreement  pursuant  to  Sections  8.1(b)  [other  than  as  a  result  of  such
Termination  Event],  8.1(c) [other than as a result of such Termination Event],
8.1(d) [other than as a result of such Termination  Event] or 8.1(e) [other than
as a result of such Termination  Event]. Upon payment of the termination fee and
any other amounts that may be due by SWVA to FNB hereunder, this Agreement shall
terminated as provided in Section 8.2.

                  (c)  If this Agreement is terminated by FNB or SWVA because of
a willful  and  material  breach by the other of any  representation,  warranty,
covenant,  undertaking  or restriction  set forth herein,  and provided that the
terminating party shall not have been in breach (in any material respect) of any
representation  and warranty,  covenant,  undertaking or  restriction  contained
herein,  then the  breaching  party shall bear and pay all such  reasonable  and
documented  costs and expenses of the other party actually  incurred,  including
fees and expenses of  consultants,  investment  bankers,  accountants,  counsel,
printers,  and  persons  involved  in  the  transactions  contemplated  by  this
Agreement, including the preparation of the Registration Statement and the Joint
Proxy Statement.

                  (d)  Except for the payment of the termination fee which shall
be paid as required by Section  8.4(b),  final  settlement  with  respect to the
payment of other fees and  expenses by the parties  shall be made within  thirty
(30) days after the termination of this Agreement.

                                    ARTICLE 9
                               General Provisions

         9.1 Entire  Agreement.  This  Agreement  contains the entire  agreement
among FNB and SWVA with respect to the Merger and the related  transactions  and
supersedes all prior arrangements or understandings with respect thereto.

         9.2 Waiver and  Amendment.  Any term or provision of this Agreement may
be waived in  writing at any time by the party  which is, or whose  shareholders
are,  entitled to the benefits  thereof,  and this  Agreement  may be amended or
supplemented by written  instructions duly executed by the parties hereto at any
time,  whether before or after the

                                       40
<PAGE>

meetings of SWVA  shareholders  referred  to in Section  7.1(a)  hereof,  except
statutory  requirements  and requisite  approvals of shareholders and regulatory
authorities.

         9.3 Descriptive Headings. Descriptive headings are for convenience only
and shall not control or affect the meaning and  construction  of any provisions
of this Agreement.

         9.4 Governing Law. Except as required otherwise or otherwise  indicated
herein,  this Agreement shall be construed and enforced according to the laws of
the Commonwealth of Virginia.

         9.5 Notices.  All notices or other communications which are required or
permitted hereunder shall be in writing and sufficient if delivered  personally,
telecopied  or sent by  recognized  overnight  courier  service or registered or
certified mail, postage prepaid, addressed as follows:

                  If to FNB:

                  J. Daniel Hardy, Jr. , President
                  FNB Corporation
                  105 Arbor Drive
                  P. O. Box 600
                  Christiansburg, Virginia  24068
                  (Tel.  540-382-6041)
                  (Fax:  540-381-6768)

                  Copies to:

                  Peter A. Seitz, Esquire
                  First National Bank
                  P. O. Box 600
                  Christiansburg, Virginia  24073
                  (Tel.  540-382-4951)
                  (Fax:  540-381-6768)

                  Fred W. Palmore, III, Esquire
                  Mays & Valentine, L.L.P.
                  1111 East Main Street, 23rd Floor (23219)
                  P. O. Box 1122
                  Richmond, Virginia  23218-1122
                  (Tel.  804-697-1396)
                  (Fax:  804-697-1339)


                                       41
<PAGE>

                  If to SWVA:

                  D. W. Shilling, President
                  SWVA Bancshares, Inc.
                  302 Second Street, S.W.
                  Roanoke, Virginia  24011-1597
                  (Tel:  540-983-1405)
                  (Fax:  540-344-9028)

                  Copy to:

                  Richard Fisch, Esq.
                  Malizia, Spidi & Fisch, PC
                  1301 K Street, N.W., Suite 700 East
                  Washington, D.C.  20005
                  (Tel.  202-434-4660)
                  (Fax:  202-434-4661)

         9.6  Counterparts.  This  Agreement  may be  executed  in any number of
counterparts, each of which shall be an original, but such counterparts together
shall constitute one and the same agreement.

         9.7  Severability.  In the event any provisions of this Agreement shall
be held invalid or  unenforceable by any court of competent  jurisdiction,  such
holding  shall not  invalidate  or  render  unenforceable  any other  provisions
hereof.  Any provision of this Agreement held invalid or  unenforceable  only in
part or degree  shall  remain in full  force and  effect to the  extent not held
invalid or unenforceable.  Further,  the parties agree that a court of competent
jurisdiction  may  reform  any  provision  of this  Agreement  held  invalid  or
unenforceable so as to reflect the intended agreement of the parties hereto.

         9.8  Subsidiaries.  All  representations,   warranties,  and  covenants
herein,  where  pertinent,  include and shall apply to the  Subsidiaries  of the
party making such representations, warranties, and covenants.


                                       42
<PAGE>



         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed in counterparts  by their duly authorized  officers and their corporate
seals to be affixed hereto, all as of the dates first written above.

                                 FNB Corporation



                                 By: /s/ J. Daniel Hardy, Jr.
                                 -----------------------------------------------
                                 J. Daniel Hardy, Jr.
                                 President and Chief Executive Officer

ATTEST:



/s/Peter Seitz
--------------
Secretary

                                 SWVA Bancshares, Inc.



                                 By: /s/ D. W. Shilling
                                 -----------------------------------------------
                                 D. W. Shilling
                                 President and Chief Executive Officer

ATTEST:



/s/Barbara C. Weddle
--------------------
Secretary



                                       43





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