SIERRA SEMICONDUCTOR CORP
S-3/A, 1997-05-06
SEMICONDUCTORS & RELATED DEVICES
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[SIERRA SEMICONDUCTOR]



                                                                    May 6, 1997
Via Edgar

Corporate Finance Division
Securities and Exchange Commission
Washington, DC 20549
Attention: Filing Desk (Mail Stop 3-5)

Re:      Sierra Semiconductor Corporation
         Indication of Oral Request for Acceleration
         Amendment No. 1 to the Registration Statement
         on Form S-3 Filed on May 6, 1997
         Commission File No. 0-19084


Dear Sir/Madam:

         In  connection  with  the  concurrent  filing  of the  above-referenced
Registration  Statement  and  pursuant to Rule 461 under the  Securities  Act of
1933, as amended, this letter indicates that an oral request for acceleration of
the effective date of the Registration Statement will be made by the undersigned
or, on its  behalf,  by Neil  Wolff or Noga  Devecseri  Spira of Wilson  Sonsini
Goodrich  &  Rosati.  The  undersigned  is aware of its  obligations  under  the
Securities Act of 1933, as amended.

         Please direct all questions regarding the above-referenced Registration
Statement  to Neil  Wolff or Noga  Devecseri  Spira  of the law  firm of  Wilson
Sonsini Goodrich & Rosati, 650 Page Mill Road, Palo Alto, California 94304-1050,
at telephone number (415)493-9300 and fax number (415)493-6811.


Very truly yours,

SIERRA SEMICONDUCTOR CORPORATION

/s/ Glenn C. Jones
- --------------------------------
By: Glenn C. Jones


Title:   Chief Financial Officer and Senior Vice President, Finance




     As filed with the Securities and Exchange Commission on May 6, 1997
                                                    Registration No. 33-
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                             ----------------------
                              AMENDMENT NUMBER 1 TO
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933
                           --------------------------
                        SIERRA SEMICONDUCTOR CORPORATION
             (Exact name of Registrant as specified in its charter)
             ------------------------------------------------------
         California                                           94-2925073
(State or other jurisdiction of                            (I.R.S. Employer
incorporation or organization)                           Identification Number)

                                 2222 Qume Drive
                               San Jose, CA 95131
                                 (408) 434-9300
(Address,  including zip code,  and telephone number,  including  area code,  of
                    Registrant's principal executive offices)
                    -----------------------------------------
                                 JAMES V. DILLER
                   Chief Executive Officer and Chairman of the
                               Board of Directors
                        Sierra Semiconductor Corporation
                                 2222 Qume Drive
                               San Jose, CA 95131
                                 (408) 434-9300

(Name, address,  including zip code, and telephone number, including area  code,
                              of agent for service)
                              ---------------------
                                    Copy to:

                                   NEIL WOLFF
                        Wilson Sonsini Goodrich & Rosati
                               650 Page Mill Road
                           Palo Alto, California 94304
                                 (415) 493-9300
                                 --------------

         APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO PUBLIC:  From time
to time after the effective date of this Registration Statement.

         If the only securities  being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, check the following box.
                                                                             ---

         If any of the  securities  being  registered  on  this  Form  are to be
offered  on a  delayed  or  continuous  basis  pursuant  to Rule 415  under  the
Securities Act of 1933 (the  "Securities  Act"),  other than securities  offered
only in connection with dividend or interest  reinvestment  plans,  please check
the following box. X
                  ---
                              ---------------------
         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering.
                                                       ---
         If this  Form is a  post-effective  amendment  filed  pursuant  to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act  registration   statement  number  of  the  earlier  effective  registration
statement for the same offering.
                                ---
         If delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following box.
                                    ---
         The Registrant hereby amends this  Registration  Statement on such date
or dates as may be necessary to delay its  effective  date until the  Registrant
shall file a further amendment which specifically  states that this Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the  Securities  Act of 1933 or until the  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.
================================================================================
<PAGE>
- --------------------------------------------------------------------------------
         Information  contained herein is subject to completion or amendment.  A
registration  statement  relating  to these  securities  has been filed with the
Securities  and Exchange  Commission.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of an offer to buy nor shall there be any sale of these  securities
in any state in which such offer,  solicitation  or sale would be unlawful prior
to registration or qualification under the securities laws of any such State.
- --------------------------------------------------------------------------------

SUBJECT TO COMPLETION
PROSPECTUS
                                 804,407 SHARES


                        SIERRA SEMICONDUCTOR CORPORATION

                                  COMMON STOCK

         This  Prospectus  relates  to  an  aggregate  of  804,407  shares  (the
"Shares") of Common Stock,  no par value per share ("Common  Stock"),  of Sierra
Semiconductor  Corporation  (the  "Company"),  which may be  resold  by  Bipolar
Integrated  Technology,  Inc.  ("BIT") to the public,  distributed by BIT to the
persons  named  herein  (the  "Selling  Shareholders")  or resold by the Selling
Shareholders  (collectively  the  "Offering").  Pursuant  to an  Asset  Purchase
Agreement  dated  August  16,  1996 among the  Company,  BIT,  PMC-Sierra,  Inc.
(Portland) and certain  shareholders of BIT, the Shares were delivered to BIT on
September 3, 1996 as consideration  for the acquisition of certain assets of BIT
by PMC-Sierra,  Inc. (Portland). Such delivery was pursuant to an exemption from
the  registration  requirements  of the  Securities Act of 1933, as amended (the
"Securities  Act").  The Shares are being registered under the Securities Act in
order to permit the public sale or other distribution of the Shares.

         The Shares may be distributed by BIT to the Selling  Shareholders  from
time to time, and sold or distributed from time to time by or for the account of
BIT or the Selling Shareholders through underwriters or dealers, through brokers
or other  agents,  or  directly  to one or more  purchasers,  at  market  prices
prevailing at the time of sale or at prices  otherwise  negotiated.  The Company
will  receive  no portion of the  proceeds  from the sale of the Shares  offered
hereby  and will bear  certain  expenses  incident  to their  registration.  See
"Selling Shareholders" and "Plan of Distribution."

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

         The Common Stock of the Company is traded on the Nasdaq National Market
("Nasdaq")  under the symbol  "SERA." On May 5, 1997, the last reported sales
price for the Common Stock as reported by Nasdaq was $21.0625 per share.
                              ---------------------

         PROSPECTIVE  INVESTORS SHOULD CAREFULLY  CONSIDER THE MATTERS SET FORTH
UNDER THE CAPTION "RISK FACTORS" LOCATED ON PAGE 3 OF THIS PROSPECTUS.

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
     AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
      SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
         PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
              REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

                  The date of this Prospectus is -------, 1997
<PAGE>

         NO DEALER,  SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION  OR TO MAKE ANY  REPRESENTATIONS  OTHER THAN THOSE  CONTAINED  IN OR
INCORPORATED  BY REFERENCE IN THIS  PROSPECTUS IN CONNECTION WITH THE OFFER MADE
BY THIS PROSPECTUS AND, IF GIVEN OR MADE,  SUCH  INFORMATION OR  REPRESENTATIONS
MUST NOT BE RELIED UPON AS HAVING BEEN  AUTHORIZED  BY THE  COMPANY,  BIT OR THE
SELLING SHAREHOLDERS.  NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE
HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES,  CREATE ANY IMPLICATION THAT THERE HAS
NOT BEEN ANY CHANGE IN THE FACTS SET FORTH IN THIS  PROSPECTUS OR IN THE AFFAIRS
OF THE COMPANY SINCE THE DATE HEREOF.  THIS  PROSPECTUS  DOES NOT  CONSTITUTE AN
OFFER OR  SOLICITATION  BY ANYONE IN ANY  JURISDICTION  IN WHICH  SUCH  OFFER OR
SOLICITATION  IS NOT  AUTHORIZED  OR IN WHICH THE  PERSON  MAKING  SUCH OFFER OR
SOLICITATION  IS NOT  QUALIFIED  TO DO SO OR TO ANYONE TO WHOM IT IS UNLAWFUL TO
MAKE SUCH OFFER OR SOLICITATION.


                              AVAILABLE INFORMATION

         The  Company  is  subject  to  the  informational  requirements  of the
Securities  Exchange Act of 1934, as amended (the "Exchange Act"), and the rules
and regulations  promulgated  thereunder,  and, in accordance  therewith,  files
reports,  proxy  and  information  statements  and  other  information  with the
Securities and Exchange Commission (the "Commission").  These reports, proxy and
information  statements  and other  information  concerning  the  Company can be
inspected  and  copied at the  public  reference  facilities  maintained  by the
Commission at Room 1024, 450 Fifth Street,  NW,  Washington,  D.C. 20549; and at
the  Commission's  regional  offices  located at Suite  1400,  500 West  Madison
Street,  Chicago,  Illinois 60661 and at Seven World Trade Center, New York, New
York 10048.  Copies of such material can also be obtained from the Commission at
prescribed rates through its Public Reference  Section at 450 Fifth Street,  NW,
Washington,  D.C. 20549.  The SEC also maintains a site on the World Wide Web at
http://www.sec.gov  that contains reports,  proxy and information statements and
other information  regarding  registrants that file electronically with the SEC.
The Common Stock is traded on the Nasdaq National Market.  Information  filed by
the  Company  with  Nasdaq may be  inspected  at the offices of Nasdaq at 1735 K
Street, NW, Washington, D.C. 20006.

         The Company has filed with the Commission a  Registration  Statement on
Form S-3 under the  Securities  Act with  respect to the Shares  offered  hereby
(including  all   amendments  and   supplements   thereto,   the   "Registration
Statement").  This Prospectus, which forms a part of the Registration Statement,
does not contain all of the information set forth in the Registration Statement,
certain  parts of which  have  been  omitted  in  accordance  with the rules and
regulations  of the  Commission.  Statements  contained  herein  concerning  the
provisions  of certain  documents  are not  necessarily  complete  and,  in each
instance,  reference is made to the copy of such document filed as an exhibit to
the  Registration  Statement or otherwise filed with the  Commission.  Each such
statement  is  qualified in its  entirety by such  reference.  The  Registration
Statement  and the exhibits  thereto can be  inspected  and copied at the public
reference  facilities and regional  offices of the Commission and at the offices
of Nasdaq referred to above.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         The following documents,  which have been filed by the Company with the
Commission  pursuant to the Exchange Act, are incorporated by reference and made
a part of this Prospectus:  (i) the Company's Annual Report on Form 10-K for the
fiscal year ended  December 31, 1996;  (ii) all other reports filed  pursuant to
Section 13(a) or 15(d) of the Exchange Act since December 31, 1996, specifically
including the amendment to the Company's  Quarterly  Report on Form 10-Q for the
quarter ended  September 29, 1996, and the Company's  Current Report on Form 8-K
dated April 18, 1997;  (iii) all reports,  definitive  proxy statement and other
documents  filed by the Company with the  Commission  pursuant to Section 13(a),
13(c), 14 or 15(d) of the Exchange Act subsequent to the date of this Prospectus
and prior to the termination of the Offering;  and (iv) all filings filed by the
Company with the  Commission  pursuant to the Exchange Act after the date of the
initial  Registration  Statement and prior to  effectiveness of the Registration
Statement.
<PAGE>

         Any statement  contained in a document or information  incorporated  or
deemed to be incorporated  herein by reference shall be deemed to be modified or
superseded  for  purposes  of this  Prospectus  to the extent  that a  statement
contained  herein  or in any  subsequently  filed  document  that also is, or is
deemed to be,  incorporated  herein by reference,  modifies or  supersedes  such
statement.  Any such  statement so modified or  superseded  shall not be deemed,
except as so modified or superseded, to constitute a part of this Prospectus.

         THE COMPANY  UNDERTAKES  TO PROVIDE,  WITHOUT  CHARGE,  TO EACH PERSON,
INCLUDING ANY BENEFICIAL  OWNER, TO WHOM A COPY OF THIS PROSPECTUS IS DELIVERED,
UPON THE WRITTEN OR ORAL  REQUEST OF SUCH  PERSON,  A COPY OF ANY AND ALL OF THE
DOCUMENTS OR INFORMATION  REFERRED TO ABOVE THAT HAS BEEN OR MAY BE INCORPORATED
BY REFERENCE IN THIS  PROSPECTUS  (EXCLUDING  EXHIBITS TO SUCH DOCUMENTS  UNLESS
SUCH EXHIBITS ARE  SPECIFICALLY  INCORPORATED BY REFERENCE).  REQUESTS SHOULD BE
DIRECTED TO INVESTOR  RELATIONS,  SIERRA  SEMICONDUCTOR  CORPORATION,  2222 QUME
DRIVE,  SAN JOSE,  CALIFORNIA  95131.  THE  COMPANY'S  TELEPHONE  NUMBER AT THAT
LOCATION IS (408) 434-9300.


                                   THE COMPANY

         The Company was  incorporated  in the State of  California  in November
1983 and commenced business in January 1984. The Company's  principal  executive
office is located at 2222 Qume Drive, San Jose,  California 95131. The Company's
Common  Stock  trades on the  Nasdaq  National  Market  under the  symbol  SERA.
References to the "Company" or "Sierra"  mean Sierra  Semiconductor  Corporation
and  include  PMC-Sierra,  Inc.  and its  other  subsidiaries,  and  predecessor
entities.

         The Company designs,  develops,  markets and supports  high-performance
semiconductor  system  solutions  for  advanced   communications   markets.  The
Company's products are used in broadband  communications  infrastructures,  high
bandwidth networks and multimedia personal  computers.  The Company is a leading
supplier  of  ATM  and  SONET/SDH  integrated  circuits  in  the  communications
infrastructure  and  networking  markets,  and also provides  these markets with
T1/E1  and  DS3/E3  integrated  circuits.   The  Company  also  supplies  highly
integrated  data and voice  communications  semiconductor  products  to personal
computer  original  equipment  manufacturers  ("PC  OEMs"),  but is  planning to
wind-down these product lines, and to focus on the broadband  infrastructure and
networking  markets.  In August 1996 the Company  announced its decision to exit
the  personal  computer  modem  chipset  business  and to put the modem  chipset
product line up for sale. This action,  which included the  restructuring of the
Company's non-networking  operations,  resulted in a one-time charge to earnings
in the quarter ending September 30, 1996, of approximately $69 million.
<PAGE>
                                  RISK FACTORS

         THE COMPANY'S  BUSINESS,  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
ARE SUBJECT TO A NUMBER OF RISKS, SOME OF WHICH ARE DESCRIBED BELOW.

         SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS

         Certain  statements  and  information  in this  Registration  Statement
constitute  "forward-looking  statements"  within  the  meaning  of the  federal
securities laws. Such forward-looking statements involve risks and uncertainties
which may cause the actual results,  performance, or achievements of the Company
to  be   materially   different   from  those   expressed  or  implied  by  such
forward-looking  statements.  The forward-looking statements include projections
relating   to   trends   in  the   broadband   infrastructure,   WAN,   LAN  and
Internet/Intranet  markets,  products under  development for SONET/SDH and T1/E1
applications  and research and development  goals;  and projections  relating to
gross margin,  growth of the  broadband  communications  market,  results of the
Company's exit from the modem chip market, continued supply of semiconductors to
the Company by outside  foundries  and by assembly  houses,  export  sales,  and
future  expenditures  on research and  development  and  marketing,  general and
administrative  activities.  Actual results could differ from those projected in
any forward-looking statements for the reasons detailed below.

FLUCTUATIONS IN OPERATING RESULTS

         The Company's  quarterly and annual operating results may vary due to a
number  of  factors,   including,  among  others,  the  timing  of  new  product
introductions,  decreased demand or average selling prices for products,  market
acceptance  of products,  demand for products of the  Company's  customers,  the
introduction  of  products  or   technologies  by  the  Company's   competitors,
competitive  pressure  on product  pricing,  the  Company's  and its  customers'
inventory  levels of the Company's  products  (particularly  discontinued  modem
products),   product   availability  from  outside   foundries,   variations  in
manufacturing  yields for the Company's  products,  expenditures for new product
and  process  development,  the  acquisition  of  wafer  fabrication  and  other
manufacturing   capacity,  and  the  acquisition  of  businesses,   products  or
technologies.  At various  times in the past,  the  Company's  foundry and other
suppliers have  experienced  lower than  anticipated  yields that have adversely
affected production and,  consequently,  the Company's operating results.  There
can be no  assurance  that the  Company's  existing or future  foundry and other
suppliers will not experience irregularities which could have a material adverse
effect on the  Company's  operating  results.  The Company from time to time may
order in advance of anticipated  customer  demand from its suppliers in response
to anticipated  long lead times to obtain  inventory and materials,  which might
result in excess  inventory  levels if expected  orders fail to  materialize  or
other  factors  render the  Company's  product or its  customer's  products less
marketable.  The  Company has limited  ability to forecast  its unit  volumes of
discontinued  modem chipset sales or the prices at which these sales will occur,
particularly in light of recent announcements by competitors of modems operating
at speeds of up to 56 kbps.  The  Company  expects  sales of modem  products  to
decline  over the first two  quarters  of 1997 and to be minimal  after June 30,
1997. The Company's visibility on sales of networking chipsets is limited due to
customer  uncertainty  regarding future demand for end-user  networking products
and  price  competition  in the  market  for ATM  and  fast  Ethernet  switching
chipsets.  Any delay or  cancellation  of  existing  orders,  or any  decline in
projected  future  orders,  by the  Company's  customers  could  have a material
adverse effect on the Company's  operating results.  Margins will vary depending
on product mix. In the near term, as the Company  continues to sell its existing
inventories of modem chipset  products,  the overall gross margin of the Company
may decline  depending  on the  percentage  of modem  chipset  product  revenues
relative  to  total  revenues.   Overall  gross  margin  may  also  be  impacted
unfavorably  due  to  anticipated  erosion  of  modem  pricing  as  the  Company
liquidates  its  existing  inventories.  In the longer  term,  the  Company  may
experience  declining  gross  profits as a  percentage  of total net revenues if
anticipated  decreases in average selling prices of existing networking products
are not offset by commensurate  reductions in product costs, or by an offsetting
increase in gross profit  contribution  from new higher gross margin  networking
products.  The  Company's  operating  results also are affected by the state and
direction of the  electronics  industry and the economy in the United States and
other markets the Company serves. The Company's  operating results could also be
adversely  affected if restructuring  reserves are insufficient for the costs of
liquidating  inventory,  retaining employees and discontinuing  operations.  The
occurrence  of any of the  foregoing  or other  factors  could  have a  material
adverse effect on the Company's  operating results.  Due to these factors,  past
results may not be indicative of future results.
<PAGE>
TECHNOLOGICAL CHANGE

         The markets for the Company's  products are  characterized  by evolving
industry  standards  and rapid  technological  change and product  obsolescence.
Technological  change may be particularly  pronounced in the developing  markets
for  communications  semiconductor  devices  used in  high-speed  networks.  The
Company's future success will be highly dependent upon the timely completion and
introduction of new products at competitive  price and performance  levels.  The
success  of new  products  depends  on a number  of  factors,  including  proper
definition  of such  products,  successful  and  timely  completion  of  product
development and introduction to market, correct judgment with respect to product
demand,  market  acceptance  of  the  Company's  and  its  customers'  products,
fabrication  yields by the  Company's  independent  foundries  and the continued
ability of the Company to offer  innovative new products at competitive  prices.
Many of these  factors are outside the control of the  Company.  There can be no
assurance  that the Company will be able to identify  new product  opportunities
successfully,  develop and bring to market new products,  achieve design wins or
be  able  to  respond  effectively  to  new  technological  changes  or  product
announcements  by others.  A failure in any of these areas would  materially and
adversely affect the Company's operating results.

         The  Company's  current  strategy is focused on  networking  high-speed
interface  chips.  Products  for   telecommunications  and  data  communications
applications  are based on industry  standards  that are  continually  evolving.
Future  transitions  in  customer  preferences  could  quickly  obsolete  Sierra
products.  The Company is developing products for the Asynchronous Transfer Mode
("ATM")  telecommunications and networking market, which is in an early stage of
development.  The emergence and adoption of new industry  standards that compete
with ATM or  maintenance  by the  industry of existing  standards in lieu of new
standards could render the Company's ATM products unmarketable or obsolete.  The
market for ATM equipment has not developed as rapidly as industry observers have
predicted,  and alternative networking technologies such as "fast Ethernet" have
developed to meet consumer requirements.  A substantial portion of the Company's
development efforts are focused on ATM and related products.  A material portion
of the  Company's  revenues and a  substantial  portion of the  Company's  gross
profits  are  derived  from  sales of ATM,  T1/E1,  DS3/E3 and  SONET/SDH  based
products.  Net revenues  derived from sales of ATM, T1/E1,  DS3/E3 and SONET/SDH
based products amounted to 33% of the Company's total net revenues for 1996. The
gross profit derived from those products  amounted to 50% of the Company's total
gross profit for 1996.

         There can be no assurance  that a significant  market for the Company's
current networking  products will emerge or, if it does emerge, that the Company
will be able to  develop  and market  these or other  networking  products  in a
timely and  commercially  viable  manner.  The  adoption or  maintenance  by the
industry of high speed transmission standards other than those which the Company
currently  addresses,  or the inability of the Company to develop and market its
networking-related  products,  would  have  a  material  adverse  effect  on the
Company's operating results.
<PAGE>
         Many  of  the  Company's   products  under   development   are  complex
semiconductor   devices  that  require   extensive  design  and  testing  before
prototypes can be  manufactured.  The  integration of a number of functions in a
single  chip  or  in a  chipset  requires  the  use  of  advanced  semiconductor
manufacturing  techniques.  This can  result in chip  redesigns  if the  initial
design  does  not  permit  acceptable   manufacturing   yields.   The  Company's
telecommunications  products are designed for  customers  who in many  instances
have not yet fully defined their hardware  products.  Design delays or redesigns
by these  customers  could in turn delay  completion or require  redesign of the
semiconductor  devices  needed for the final hardware  product.  In this regard,
many of the relevant  standards and  protocols for products  based on high speed
networking technologies have not been widely adopted or ratified by the relevant
standard-setting  bodies. Redesigns or design delays often are required for both
the hardware  manufacturer's products and the Company's chipsets as industry and
customer  standards,  protocols or design  specifications  are  determined.  Any
resulting  delay  in the  production  of the  Company's  products  could  have a
material adverse effect on the Company's operating results.

         A  subsidiary  of  the  Company   acquired   in-process   research  and
development and developed  technology relating to Ethernet switching  technology
from BIT,  Inc..  The  acquired  technology  is generally in the early stages of
development.  The Company has redesigned one product acquired from BIT, Inc. and
has announced a customer's  intention to include this integrated  circuit in the
customer's product. Two other products acquired from BIT, Inc. are in the design
phase,  two  more  are  undergoing  product  definition,   and  four  have  been
conceptually  outlined.  The Company will need to expend significant  additional
resources to complete products based on this technology.  Completion of products
based on the acquired  technology  is  primarily  dependent  upon the  Company's
ability  to hire  additional  engineering  staff in the  areas of  software  and
firmware design,  system level  application  development,  product testing,  and
evaluation and characterization. The Company estimates that in order to complete
and bring to market the first products based on the acquired technology, it will
need to expend approximately $3.3 million in 1997, and to acquire  approximately
$1.0 million of additional  capital  equipment in 1997. The Company  anticipates
that  internally  generated  cash  flows  will be the  source of funds for these
expenditures.

         The Company  cannot  assure that these  products will be completed in a
timely  manner  or  at  all,  or  that  if  completed  these  products  will  be
commercially adopted.

COMPETITION

         The   semiconductor   industry   is   intensely   competitive   and  is
characterized by rapid technological  change and by price erosion.  The industry
consists of major domestic and international  semiconductor  companies,  many of
which have substantially greater financial and other resources than the Company.
Emerging companies also provide  significant  competition in this segment of the
semiconductor   market.  The  Company  believes  that  its  ability  to  compete
successfully  in this market  depends on a number of factors,  including,  among
others, the price, quality and performance of the Company's and its competitors'
products,  the timing and success of new product  introductions  by the Company,
its  customers  and  its  competitors,  the  emergence  of  new  standards,  the
development   of  technical   innovations,   the  ability  to  obtain   adequate
manufacturing  capacity  and  sources  of  raw  materials,   the  efficiency  of
production,  the rate at which the  Company's  customers  design  the  Company's
products into their products, the number and nature of the Company's competitors
in a  given  market,  the  assertion  of  the  Company's  and  its  competitors'
intellectual property rights and general market and economic conditions.

         The Company's  competitors  include,  among others,  Texas Instruments,
Level One Communications,  Inc., Lucent  Technologies,  Dallas Semiconductor and
Transwitch.  The  number  of  competitors  in this  market  and  the  technology
platforms on which their products will compete may change in the future. To date
there have been several  competing  technologies in the  telecommunications  and
networking  markets and not all standards  have been  established  to date.  The
Company's success will depend on the successful  development of a market for its
customers'  products.  It is  likely  that  over the next few  years  additional
competitors  will enter the market with new products.  These new competitors may
have  substantially  greater  financial  and other  resources  than the Company.
Competition among  manufacturers of semiconductors  like the Company's  products
typically occurs at the design stage, where the customer  evaluates  alternative
design approaches that require integrated circuits. Because of shortened product
life  cycles and even  shorter  design-in  cycles in  certain  of the  Company's
customers  products,   the  Company's  competitors  have  increasingly  frequent
opportunities to achieve design wins in next generation systems.  Any success by
the  Company's  competitors  supplanting  the  Company's  products  would have a
material adverse effect on the Company's operating results.
<PAGE>
ACCESS TO WAFER FABRICATION AND OTHER MANUFACTURING CAPACITY

         The Company does not own or operate a wafer fabrication  facility,  and
all of its semiconductor  device requirements are supplied by outside foundries.
Substantially  all  of  the  Company's   semiconductor  products  are  currently
manufactured by third party foundry  suppliers.  The Company's foundry suppliers
fabricate products for other companies and produce products of their own design.
The  Company's  reliance on  independent  foundries  involves a number of risks,
including  the  absence  of  adequate   capacity,   the   unavailability  of  or
interruptions in access to certain process technologies and reduced control over
delivery  schedules,  manufacturing  yields and  costs.  In the event that these
foundries  are unable or  unwilling  to continue to  manufacture  the  Company's
products in required  volumes,  the  Company  will have to identify  and qualify
acceptable additional or alternative foundries. This qualification process could
take six months or longer.  No assurance can be given that any such source would
become  available  to the Company or that any such source would be in a position
to satisfy the Company's  production  requirements in a timely basis, if at all.
Any  significant  interruption  in the supply of  semiconductors  to the Company
would result in the allocation of products to customer, which in turn could have
a material adverse effect on the Company's operating results.

         All  of  the   Company's   semiconductor   products  are  assembled  by
sub-assemblers  in  Asia.  Shortages  of raw  materials  or  disruptions  in the
provision of services by the Company's  assembly  houses or other  circumstances
that would  require the Company to seek  additional  or  alternative  sources of
supply or assembly could lead to supply constraints or delays in the delivery of
the Company's  products.  Such  constraints  or delays may result in the loss of
customers or other  adverse  effects on the  Company's  operating  results.  The
Company's  reliance on independent  assembly  houses  involves a number of other
risks, including reduced control over delivery schedules, quality assurances and
costs and the possible  discontinuance of such contractors'  assembly processes.
Any supply or other  problems  resulting  from such risks  would have a material
adverse effect on the Company's operating results.

CUSTOMER CONCENTRATION

         The Company has no long-term  volume purchase  commitments  from any of
its major customers.  In 1995 and 1996, Apple Computer, Inc. represented 24% and
10%,  respectively,  of net  revenues  of the  Company.  In 1996,  two modem and
graphics  board  manufacturers,  SCI  Manufacturing,  Inc.  and  Askey  Computer
Corporation,  each represented  approximately 11% of the Company's net revenues.
In the future,  sales to these customers are expected to decline, as the Company
shifts its focus  away from  non-networking  products,  and exits from the modem
chipset  business.  Due to the  Company's  exit from the modem  business,  these
customers are not expected to be significant customers in the future.

         The  reduction,  delay  or  cancellation  of  orders  from  one or more
significant  customers  could  materially  and  adversely  affect the  Company's
operating  results.  Due to the  relatively  short  product  life  cycles in the
telecommunications  and data  communications  markets,  the Company's  operating
results  would  be  materially  and  adversely  affected  if one or  more of its
significant  customers  were  to  select  devices  manufactured  by  one  of the
Company's competitors for inclusion in future product generations.  There can be
no assurance that the Company's  current customers will continue to place orders
with the Company,  that orders by existing customers will continue at the levels
of previous  periods or that the Company will be able to obtain  orders from new
customers.  Loss  of one  or  more  of  the  Company's  current  customers  or a
disruption in the Company's sales and distribution channels could materially and
adversely affect the Company's operating results.
<PAGE>
INTERNATIONAL OPERATIONS

         During fiscal years 1996, 1995 and 1994,  international sales accounted
for approximately 53%, 39% and 38% of the Company's net revenues,  respectively.
The Company  expects  that  international  sales will  continue  to  represent a
significant  portion  of its net  revenues  for the  foreseeable  future.  PMC's
operations,  which are  primarily in Canada,  are expected to represent a larger
percentage of the Company's overall operations.  In addition,  substantially all
of the Company's products are manufactured,  assembled and tested by independent
third parties in Singapore,  Taiwan,  Malaysia and the  Philippines.  Due to its
reliance on international sales and foreign third-party manufacturing,  assembly
and  testing  operations,  the  Company is  subject  to the risks of  conducting
business outside of the United States.  These risks include  unexpected  changes
in, or impositions of, legislative or regulatory requirements and policy changes
affecting  the  telecommunications  and  data  communications   markets,  delays
resulting from difficulty in obtaining  export licenses for certain  technology,
tariffs,  quotas,  exchange  rates and other trade  barriers  and  restrictions,
longer payment cycles,  greater  difficulty in accounts  receivable  collection,
potentially  adverse  taxes,  the burdens of complying with a variety of foreign
laws and other factors beyond the Company's control. The Company is also subject
to general  geopolitical risks in connection with its international  operations,
such as political,  social and economic  instability,  potential hostilities and
changes in  diplomatic  and trade  relationships.  Sales in Europe are generally
denominated  in local  currencies,  while  sales in the  rest of the  world  are
generally  denominated in U.S. dollars.  As a result,  the Company is subject to
the risks of currency  fluctuations.  There can be no assurance that one or more
of the  foregoing  factors  will  not  have a  material  adverse  effect  on the
Company's operating results.

FUTURE CAPITAL NEEDS

                  The Company must continue to make  significant  investments in
research  and  development  as  well  as  capital  equipment  and  expansion  of
facilities for networking  products.  The Company's future capital  requirements
will depend on many factors,  including, among others, product development,  the
Company's  ability to sell existing  modem chipset  inventories,  investments in
working  capital,  and  acquisitions  of  complementary  business,  products  or
technologies.  To the extent that  existing  resources  and future  earnings are
insufficient  to fund the  Company's  operations,  the Company may need to raise
additional  funds  through  public  or  private  debt or equity  financings.  If
additional  funds are raised  through  the  issuance of equity  securities,  the
percentage  ownership  of current  shareholders  will be reduced and such equity
securities  may have rights,  preferences  or privileges  senior to those of the
holders of the Company's Common Stock. No assurance can be given that additional
financing  will be available or that, if available,  it can be obtained on terms
favorable  to the  Company  and its  shareholders.  If  adequate  funds  are not
available,  the Company may be required to delay, limit or eliminate some or all
of its proposed operations.

                  The Company  has  available a line of credit with a bank under
which the Company  may borrow up to $10  million.  Advances  made under the line
will be fully secured by cash deposited by the Company. The agreement expires in
July 1997. The Agreement requires the Company to maintain, on a quarterly basis,
minimum cash equal to three times the then current outstanding principal balance
of the term loan. The agreement  prohibits  dividend payments without the bank's
prior written consent and other major  transactions  except that the Company may
(i) acquire other companies, using up to $1 million in cash, (ii) enter into off
balance sheet equipment leases, not to exceed $15 million in the aggregate,  and
(iii) issue convertible securities with subordination provisions satisfactory to
the bank.
<PAGE>
DEPENDENCE ON KEY PERSONNEL

         The  Company's  success  depends  to  a  significant  extent  upon  the
continued  services of its key technical  personnel,  particularly  those highly
skilled at the design and test  functions  involved in the  development  of high
speed  networking  products  and  related  software.  The  competition  for such
employees is intense.  The Company has no  employment  agreements  in place with
these key  personnel.  However,  the Company from time to time issues  shares of
Common  Stock or options to  purchase  Common  Stock of the  Company  subject to
vesting.  To the extent shares  purchased from or options granted by the Company
have economic value,  these securities could create  retention  incentives.  The
loss of the services of one or more of these key personnel, and any difficulties
the Company may experience in hiring  qualified  replacements,  would materially
and  adversely  affect  the  Company's  operating  results.  As a result  of the
Company's  decision to exit the modem chipset business and restructure its other
non-networking operations,  certain key administrative and engineering personnel
in  non-networking  operations  may  terminate  their  employment by the Company
earlier  than  planned  by the  Company.  The  Company  cannot  assure  that the
retention incentives which the Company has put in place, which include retention
payments  of up to six  months  salary,  will  be  sufficient  to  retain  these
individuals.  If one or more of these personnel  terminate their employment with
the Company, the operating results of the Company could be adversely affected.

  PATENTS AND PROPRIETARY RIGHTS

         The Company's  ability to compete is affected by its ability to protect
its  proprietary  information.  The Company  relies on a combination of patents,
trademarks,  copyrights,  trade  secret  laws,  confidentiality  procedures  and
licensing  arrangements to protect its intellectual property rights. The Company
currently holds several patents in the networking and  non-networking  areas and
has a number of pending  patent  applications.  There can be no  assurance  that
patents will issue from any of the Company's  pending  applications  or that any
claims  allowed will be of  sufficient  scope or  strength,  or be issued in all
countries  where the  Company's  products  can be sold,  to  provide  meaningful
protection or any commercial advantage to the Company. In addition,  competitors
of the Company may be able to design around the Company's  patents.  The laws of
certain  foreign  countries  in  which  the  Company's  products  are  or may be
developed,  manufactured or sold,  including  various countries in Asia, may not
protect the  Company's  products  or  intellectual  property  rights to the same
extent as do the laws of the  United  States  and thus make the  possibility  of
piracy of the Company's  technology  and products  more likely.  There can be no
assurance  that the  steps  taken by the  Company  to  protect  its  proprietary
information  will be adequate to prevent  misappropriation  of its technology or
that the Company's  competitors will not independently develop technologies that
are substantially equivalent or superior to the Company's technology.
<PAGE>
         The semiconductor  industry is characterized by vigorous protection and
pursuit of  intellectual  property  rights or positions,  which have resulted in
significant and often  protracted and expensive  litigation.  The Company or its
customers  or  foundries  have in the  past,  and may  from  time to time in the
future,  be notified of claims  that the  Company may be  infringing  patents or
other intellectual property rights owned by third parties. If it is necessary or
desirable,  the Company may seek licenses under patents or intellectual property
rights.  There can be no assurance  that  licenses will be available or that the
terms of any offered licenses will be acceptable to the Company.  The failure to
obtain a license  from a third party for  technology  used by the Company  could
cause  the  Company  to  incur  substantial   liabilities  and  to  suspend  the
manufacture of products or the use by the Company's foundry suppliers  requiring
the  technology.  In the past,  the  Company's  customers  have been required to
obtain  licenses from and pay royalties to third parties for the sale of systems
incorporating the Company's semiconductor devices. If this occurs in the future,
the customers'  businesses may be materially  and adversely  affected,  which in
turn would have a material  adverse effect on the Company's  operating  results.
Furthermore, the Company may initiate claims or litigation against third parties
for  infringement  of the  Company's  proprietary  rights  or to  establish  the
validity  of the  Company's  proprietary  rights.  Litigation  by or against the
Company  could  result in  significant  expense  to the  Company  and divert the
efforts of the Company's technical and management personnel, whether or not such
litigation results in a favorable determination for the Company. In the event of
an adverse result in any such  litigation,  the Company could be required to pay
substantial damages, cease the manufacture, use and sale of infringing products,
spend significant resources to develop  non-infringing  technology,  discontinue
the use of certain  processes or obtain  licenses to the infringing  technology.
There  can be no  assurance  that  the  Company  would  be  successful  in  such
development or that such licenses would be available on reasonable  terms, or at
all, and any such  development  or license  could  require  expenditures  by the
Company  of  substantial  time  and  other  resources.  Patent  disputes  in the
semiconductor   industry  have  often  been  settled   through   cross-licensing
arrangements.  Because  the  Company  currently  does  not  have  a  substantial
portfolio  of patents,  the Company may not be able to settle an alleged  patent
infringement claim through a cross-licensing  arrangement.  Any successful third
party  claim  against the Company or its  customers  for patent or  intellectual
property  infringement,  would have a material  adverse  effect on the Company's
operating results.

ACQUISITIONS

         The Company's strategy may involve, in part,  acquisitions of products,
technologies or businesses from third parties. Identifying and negotiating these
acquisitions  may divert  substantial  management  time away from the  Company's
operations.  An  acquisition  could absorb  substantial  cash  resources,  could
require the Company to incur or issuance of additional  equity  securities could
dilute,  and  could  represent  an  interest  senior  to  the  rights  of,  then
outstanding  common stock. An acquisition  which is accounted for as a purchase,
like the acquisition of PMC in 1994 and the acquisition of certain assets of BIT
in September 1996,  could involve  significant  one-time  write-offs,  and could
involve the amortization of goodwill and other  intangible  assets over a number
of years,  which would adversely affect earnings in those years. Any acquisition
will require  attention from the Company's  management to integrate the acquired
entity  into the  Company's  operations,  may  require  the  Company  to develop
expertise  outside  its  existing  businesses  and may result in  departures  of
management  of  the  acquired  entity.  An  acquired  entity  may  have  unknown
liabilities,  and its  business may not achieve the results  anticipated  at the
time of the acquisition.

VOLATILITY OF STOCK PRICE

         Factors such as  announcements  of the  introduction of new products by
the  Company  or  its  competitors,  quarterly  fluctuations  in  the  Company's
financial results or the financial results of other  semiconductor  companies or
of companies in the telecommunications or networking equipment industry, general
condition in the semiconductor industry, and conditions in the financial markets
have  in  the  past  caused  the  price  of  the  Common   Stock  to   fluctuate
substantially,  and may do so in the future.  In addition,  the stock market has
recently  experienced  price and volume  fluctuations,  which have  particularly
affected the market  prices for many high  technology  companies  and which have
often been unrelated to the operating performance of the specific companies.
<PAGE>
                                 USE OF PROCEEDS

         The Company will not receive any  proceeds  from the sale of the Shares
but will pay all expenses related to the  registration of the Shares.  See "Plan
of Distribution."

                              SELLING SHAREHOLDERS

         The Shares of the Common Stock of the Company are to be offered for the
account of BIT and the Selling Shareholders.  Prior to the offering BIT may hold
up to 804,407 shares of Common Stock,  which represent  beneficial  ownership of
approximately 2.76% of the Company's outstanding Common Stock. BIT may offer and
sell all or any of the Shares pursuant to this  Prospectus.  The following table
sets forth the name of each Selling Shareholder, the aggregate maximum number of
shares of Common  Stock each Selling  Shareholder  may be entitled to out of the
Shares and the aggregate number of shares of Common Stock registered hereby that
each Selling Shareholder may offer and sell pursuant to this Prospectus.  All of
the Shares offered are issued and outstanding as of the date of this Prospectus.
Because BIT and the Selling Shareholders may sell all or a portion of the Shares
at any time and from time to time after the date hereof, no estimate can be made
of the number of shares of Common  Stock that BIT and each  Selling  Shareholder
may retain upon  completion  of the  Offering.  To the knowledge of the Company,
none of the Selling Shareholders has any material  relationship with the Company
except as set forth in the footnotes to the following table.
<TABLE>
<CAPTION>

                                Selling Shareholder                                            Shares           Shares to be
                                                                                             Entitled to       Offered for the
                                                                                            Prior to the          Selling
                                                                                              Offering         Shareholder(1)

<C>                                                                                      <C>                 <C>
1215 ASSOCIATES                                                                                 140                 140
ABBATE, ANTHONY M. and ALLIE J. JT TEN                                                          280                 280
AENEAS VENTURE GROUP                                                                         73,744              73,744
AGRON, RUTH and GARY JT TEN                                                                     140                 140
AKERS, WILLIAM B                                                                                280                 280
ALCORN, WILLIAM C/O WOOD STRUCTURES, INC                                                        140                 140
ALRUMAIH, ABDULRAHMAN N                                                                         280                 280
AMSOUTH BANK NA TTEE, NORWOOD CLINIC INC PC MONEY PURCHASE PENSION TRUST FBO R.                 140                 140
CARRAWAY
ANDERSON, LARRY                                                                                 140                 140
ANDREWS, MILBREY W                                                                              140                 140
ARATA, MARGIT W                                                                                 280                 280
ARBITTER, ARNOLD I. C/O S.J. BERARDINO                                                          140                 140
AYANIAN, ZAVEN S. MR                                                                            140                 140
B&G TRADERS INC PROFIT SHARING PLAN & TRUST 002 FBO GARY GOLDSTEIN                              140                 140
BAIRD, DAVIS                                                                                    140                 140
BANCBOSTON VENTURES                                                                          38,954              38,954
BANCORP HAWAII SBIC #303                                                                        403                 403
<PAGE>
BATTERTON, THOMAS H                                                                             280                 280
BEAR STEARNS, INC. FBO M. SCOTT ATHANS IRA: ACCT #215-01212                                     140                 140
BEAUMONT, PETER W                                                                               280                 280
BENNER, WILLIAM B. TTEE FBO WILLIAM B. BENNER TRUST                                             140                 140
BERGER, GARY & REIKO                                                                            140                 140
BHATI, BALVEER S. BHATI, SANTOSH JTWROS                                                         280                 280
BIBBY, DOUGLAS BIBBY, LORRAINE C. JTWROS                                                        140                 140
BILLINGS, RUTH MCCALDEN, THOMAS                                                                 140                 140
BIT HOLDINGS, LTD ATTN: ELMER YUEN C/O ROBERT SOLOMON                                       314,412             314,412
BLAIR, ROBERT                                                                                   280                 280
BLOCK, MERRILL BLOCK, EILEEN JTWROS                                                             561                 561
BOGIN, RONALD J                                                                                 140                 140
BONANNO, PHILIP MDPC PENSION TRUST                                                              140                 140
BOTTINELLI, MARIAN J                                                                            140                 140
BOWER, THOMAS K                                                                                 140                 140
BOYER, MARY A .                                                                                 280                 280
BRACKEEN, DANIEL L                                                                              140                 140
BRADY, PAT FOY                                                                                  280                 280
BRAINERD, STEVE                                                                                   1                   1
BRAMAN, DANIEL H. JR                                                                            561                 561
BRITTAIN, JANE A                                                                                140                 140
BROOKER, JAMES                                                                                  140                 140
BROOKS FAMILY TRUST ATTN: REX & COLLEEN BROOKS C/O BROOKS TECHNICAL GROUP                         3                   3
BROWN, DONALD                                                                                   140                 140
BROWN, JANE M                                                                                   140                 140
BROWN, MARTIN S                                                                                 140                 140
BROWN, MORTON E                                                                                 140                 140
BROWNING, STEPHEN                                                                               140                 140
BRUEMMER, BRYAN TTEE BRYAN BRUEMMER TRUST                                                       140                 140
BRYAN, JACK L                                                                                   140                 140
BUFFUM, BETTY UPHAM                                                                             140                 140
BURDICK, ALLAN L                                                                                140                 140
BURKE, JOSEPH A                                                                                 140                 140
BUSCH, SUZANNE TEROLLER TTEE SUZANNE TEROLLER BUSCH TRUST                                       140                 140
CALL, NEIL J                                                                                    140                 140
CAMPBELL, LINDA FRYE, NELLIE GARRETT JTWROS                                                     140                 140
<PAGE>
CAREY, WILLIAM J                                                                                140                 140
CARSON, ELIZABETH E. TTEE FBO ELIZABETH E CARSON TRUST                                          140                 140
CARTER, ALBERT M                                                                                140                 140
CASTELLANI, MARIE E                                                                             140                 140
CB CAPITAL INVESTORS, INC. ATTN: EDWARD L. KOCH III PRESIDENT                                   784                 784
CECKLER, WILLIAM H. CECKLER, MARY E. JT TEN                                                     140                 140
CEDENO, ANSBERTO (BERT)                                                                           1                   1
CHAPIN, ROSS K                                                                                   11                  11
CLARK, JACK L. CLARK, JUDITH COMM PROP                                                          140                 140
CLEARWATER VENTURES LP                                                                          183                 183
CLINE, ANITA DAVIES                                                                             140                 140
COBLE, G. WILLIAM                                                                               140                 140
CONN, J.D. C/O BEACON CADILLAC                                                                  140                 140
CONNOR, THOMAS K                                                                                140                 140
COOPER, BARRY R                                                                                 280                 280
CORRINGTON, RICHARD                                                                             140                 140
COSGROVE, ROBERT C. TTEE ROBERT C COSGROVE TRUST                                                561                 561
COSTELLO, ROBERT DR                                                                             140                 140
COSTENBADER, VIRGINIA                                                                           280                 280
COUSIN, WINNIE CUST FBO JEFFREY N. COUSIN                                                       140                 140
COUSIN, WINNIE CUST FBO JENNIFER A. COUSIN                                                      140                 140
COUTTS, CARLYLE B                                                                               140                 140
COWAN, BARBARA                                                                                  140                 140
COWEN & COMPANY ATTN: MICHAEL DORSEY                                                             53                  53
COYLE, ALFRED J                                                                                  37                  37
CRAWFORD, SAMUEL J. CRAWFORD, PATTI J. JTWROS                                                   140                 140
CYRIAC, IGNATIUS CYRIAC, BABYCENT I. JTWROS                                                     140                 140
DE EUROPA, MODELISTA SA ETUDE DEMMESMUDRY ET IGLEHART 4 RUE CHARLES BONNET                      280                 280
DECKER, MARGARET M. DICKINS, MARGARET E. JTWROS                                                 561                 561
DEVOR, DANIEL DEVOR, NINA M. JTWROS                                                             140                 140
DFC VENTURES, LTD. ATTN: CHRIS ELLISON GENERAL PARTNER                                        1,411               1,411
DIAZ, REINALDO                                                                                  117                 117
DINEGAR, THOMAS                                                                                 140                 140
DOPERAK, GEORGE M                                                                               140                 140
DOWN EAST ORTHOPEDIC ASSOCIATE                                                                  280                 280
DOZZI, DOMENIC P                                                                                140                 140
<PAGE>
DOZZI, PETER C                                                                                  280                 280
EDWARD RUFF & ASSOCIATES EMPLOYEE PROFIT SHARING PLAN AND TRUST                                 561                 561
EDWARDS, R. DEAN                                                                                140                 140
EICHEL, NORMAN                                                                                  140                 140
EISING, PETER W                                                                                  87                  87
ENRIGHT, PATRICK                                                                                 22                  22
ERVIN WEIL FAMILY TRUST ATTN: DAVID WEIL                                                      2,901               2,901
EWING, ANDREW JR EWING, JOANNE B. JT TEN                                                        140                 140
FARMCO FARMERS & MERCHANTS TRUST CO. OF LONG BEACH TRUST #36-55-8                               140                 140
FLY, WILLIAM S                                                                                  140                 140
FOLLMAN, ROBERT FOLLMAN, CAROLE JT TEN                                                          421                 421
FOOTE, LAWRENCE R. FOOTE, ROSEMARY G. JTWROS                                                    140                 140
FRANTZ, PAUL T                                                                                  280                 280
FRANTZ, THECLA S                                                                                140                 140
FUCHS, PAUL H                                                                                     1                   1
FUTRELL, J. WILLIAM                                                                             140                 140
GAJENDRAGADKAR, S. DR. MDPC BRADLEY CLINIC                                                      280                 280
GARDNER, JOHN O. GARDNER, PENNY A. JTWROS                                                       140                 140
GATON, LEO S                                                                                    280                 280
GEARY, HELEN S. TTEE UNDER DECLARATION OF TRUST 11/14/88                                        140                 140
GELLER, ROBERT C                                                                                140                 140
GERDAU, CARLSON                                                                                 140                 140
GERRIE, ROBERT                                                                                  280                 280
GIBSON, SALLY                                                                                   140                 140
GILCHRIST, WILLIAM TRUSTEE FOR JUDY SCHLOTZHAUER                                                  5                   5
GILCHRIST, WILLIAM TRUSTEE FOR KATHRYN SCHLOTZHAUER                                               5                   5
GILES, KENNETH E                                                                                 49                  49
GLOVER INVESTMENTS LTD 23 SAN MARTIN STREET MAGALLANES VILLAGE                                2,804               2,804
GOLDSCHLAGER, ARNOLD W                                                                          140                 140
GOSCHA, GARY E                                                                                  280                 280
GRAPHIC ARTS PUBLISHING INC                                                                     140                 140
GROBE, RUTH H                                                                                   280                 280
GUERRA, GASTON G. SURGICAL PRACTICE PROFIT SHARING PLAN                                         280                 280
GULLACE, RALPH                                                                                  140                 140
HALL CAPITAL MANAGEMENT ATTN: RONALD HALL                                                    19,746              19,746
<PAGE>
HAMMAD, SAMY & SAWSON                                                                           140                 140
HARRIS, EDMUND J. HARRIS, MARILYN C                                                             140                 140
HARRIS, SARA GRAYSON                                                                            140                 140
HAVANEK, JOSEPH                                                                                 561                 561
HAY, ROBERT F                                                                                   140                 140
HAYDEN, KENNETH                                                                                 140                 140
HAYNES, HARLEY ANDERSON                                                                         140                 140
HEMER, RICHARD E                                                                                140                 140
HERSH, CARL TTE MARION HERSH REVOCABLE TRUST DTD 4-29-85                                        140                 140
HIGHNESS, JOEL HIGHNESS, NANCY JT TEN                                                           140                 140
HODGSON, RICHARD                                                                              7,759               7,759
HOFFMAN, CLIVE & CAROL TTEES CLIVE HOFFMAN ASSOCIATES PROFIT SHARING RETIREMENT                 140                 140
PLAN
HOLLIS, PHILIP D                                                                                140                 140
HOOVER, KATHRYN                                                                                 140                 140
HSIANG, SHI-LING C                                                                              140                 140
HUBBARD, STEVEN S                                                                            27,017              27,017
HUDSON, A. RAY M.D                                                                              140                 140
HUGHES, PAUL A                                                                                  140                 140
HUGHES, WILLIAM C                                                                               140                 140
INTERNATIONAL STRATEGIC ALLIANCE ATTN: GEORGE KOO                                                70                  70
INTERVEN PARTNERS 1987 ATTN: JONATHAN E. FUNK                                                   368                 368
INTERVEN PARTNERS II LP ATTN: WAYNE KINGSLEY CHAIRMAN                                        73,821              73,821
ISLAND PARTNERS C/O GEORGE TEXTOR                                                                38                  38
JACOBS, JOHN III                                                                                280                 280
JAQUES, S. CARLENE                                                                              140                 140
JOHNSON, HOWARD B                                                                                51                  51
JOHNSON, S. ALLAN                                                                               280                 280
JONES, CONLEY ROY                                                                               280                 280
JONES, WHITNEY M                                                                                140                 140
JORDAN, GARY JORDAN, ANNETTE                                                                    561                 561
JOSEPH KIRK DAVENPORT (INC) RETIREMENT TRUST                                                    140                 140
JOY, WILLIAM                                                                                      4                   4
JUSTICE, SUSAN H                                                                                140                 140
KAKOS, GERARD S                                                                                 561                 561
KANDATHIL, VALSAMMA TERESA                                                                      140                 140
KANE, ALAN KANE, MARY JT TEN                                                                    561                 561
<PAGE>
KAPLAN, JANET S                                                                                 140                 140
KEE, DR. HERBERT L. KEE, VIRGINIA M                                                             140                 140
KELEKAR, DILIP MD TTEE FBO DILIP R. KELEKAR RETIREMENT TRUST                                    140                 140
KIDDER PEABODY AND COMPANY ATTN: KEN KANAPAN                                                     13                  13
KINGSLEY, WAYNE                                                                               7,653               7,653
KLEINER, EUGENE                                                                                  37                  37
KOBBE, JOHN                                                                                   4,842               4,842
KOLBE INC. PROFIT SHARING PLAN                                                                  140                 140
KORNFELD, KENNETH H. KORNFELD, RONDA E. JTWROS                                                1,121               1,121
KURUVILLA, DR. M. P                                                                             140                 140
LAESCH, JOHN                                                                                    140                 140
LANDBERG, BETTY                                                                                 280                 280
LANE, CECELIA B                                                                                 140                 140
LAWSING, JAMES F. III MD PA PROFIT SHARING PLAN UA DTD 6/21/84                                  140                 140
LEHMAN, JOSEPHINE TTEE FOR WILLIAM LEHMAN RESIDUARY TRUST DTD 2/28/92                           280                 280
LEHMAN, WILLIAM L. JR                                                                           140                 140
LICHT, HARLEY EXECUTIVE VP BROOKS TECHNICAL GROUP                                                 1                   1
LIN, XIN YING                                                                                   544                 544
LINCOFF, MILTON H. LINCOFF, MIRIAM L. JT TEN                                                    140                 140
LISSAUER, TED                                                                                   140                 140
LITTLEFIELD, THOM LITTLEFIELD AND SMITH ASSOC                                                     1                   1
LLOYD, PETRINA A                                                                                140                 140
LOWE, JACK M. LOWE, MARJORIE A. JTWROS                                                          140                 140
M&L VENTURES ATTN MORT SADOWSKY                                                                 140                 140
MACKINTOSH, J. HERBERT                                                                          140                 140
MACON, GEORGE W. III                                                                            280                 280
MADDEN, DAVID                                                                                    44                  44
MANER, DOUGLAS O                                                                                140                 140
MANLEY, THERESA K. (DOZZI, THERESA K.)                                                          140                 140
MARDELLI, T. JOSEPH TTEE MONEY PURCHASE & PENSION TRUST FBO T JOSEPH MARDELLI                   140                 140
MARSH, ALBERT P. MARSH, ANGELA A. JT TEN                                                        140                 140
MAURICE, DEBORAH BUFFUM C/O ALEX C. HOROWITZ                                                    140                 140
MAXWELL, JAMES T. MD                                                                            140                 140
MCGINN, JOHN M.D.PROFIT SHARING PLAN DATED 9/25/85                                              280                 280
MCGURN, WILLIAM MCGURN, DARLENE                                                                 280                 280
MCLARNEY, CHARLES PATRICK MCLARNEY, MARTINA J                                                   140                 140
<PAGE>
MCNEE, JOHN C. MCNEE, DOROTHY M. JT TEN                                                         140                 140
MEMORIAL MEDICAL CENTER FOUNDATION ATTN: TIM JACKERT                                            140                 140
MERHAUT, JAMES                                                                                    2                   2
METZE, JARRED R. METZE, BRENDA JTWROS                                                           280                 280
MICHAUD, JOSEPH E. MICHAUD, JONETTE                                                             561                 561
MIDLAND INC                                                                                     280                 280
MILLER, BRUCE (2)                                                                             7,719               7,719
MILLER, DAVID C                                                                                 280                 280
MILLER, GORDON                                                                                  217                 217
MILLER, HARRIET C                                                                               280                 280
MILLER, JOHN H. III                                                                             280                 280
MILLER, RICHARD P                                                                               561                 561
MILLS, JANICE M                                                                                   1                   1
MOORE, ALLEN III & ANNE TRUSTEES FBO ALLEN MOORE III TRUST DTD 7-27-87                          280                 280
MOORMAN, DALE & MILDRED                                                                         280                 280
MORGAN, DONALD G                                                                                280                 280
MORRIS, JANET M (2)                                                                           7,719               7,719
MORTON, SCOTT M                                                                                   1                   1
MOSS, WILLIAM F                                                                                 140                 140
MUTRUX, PHILIPPE G                                                                              140                 140
NASON, IRVING C. MD TTEE IRVING C NASON MD PENSION PLAN                                         140                 140
NEAL, W. RONALD NEAL, MONA S. JT. TEN                                                           140                 140
NETTLES, CHARLES NETTLES, EMMA JTWROS                                                           140                 140
NIMEH, NADIM                                                                                    140                 140
NOLAN, DAVID AND NOLAN, CYNTHIA JTWROS                                                          140                 140
NORTHEAST VENTURES ATTN: W. BRIAN SATTERLEE                                                     809                 809
NUBER, CLARK & CO CONTRIBUTORY PROFIT SHARING PLAN AND TRUST FBO THOMAS J SEDLOCK               140                 140
O'DONNELL & MASUR, L.P. ATTN: MARK MASUR                                                        416                 416
ONEIDA SURGICAL PC PENSION PLAN TRUST DTD 6/15/73 FBO ROBERT E. PICKELS, JR. MD                 140                 140
OTTEMAN, MERLIN DR. NORTHERN COLO. SURGICAL ASSOC                                               140                 140
PACIFIC VENTURE FINANCE ATTN: NATHALIE WESSLING                                                 178                 178
PAINEWEBBER FBO PAINEWEBBER DEVELOPMENT CORP. CARRIED INTEREST SHARING PLAN                     360                 360
PAINEWEBBER FBO PAINEWEBBER DEVELOPMENT CORP                                                  1,158               1,158
PAINEWEBBER INC. FBO ANDREW, FRED W                                                             140                 140
<PAGE>
PAINEWEBBER INC. FBO ASHTON, CHARLES F IRA                                                      140                 140
PAINEWEBBER INC. FBO BEARD, ESTHER ANN (IRA)                                                    140                 140
PAINEWEBBER INC. FBO BIBBY, DOUGLAS IRA                                                         140                 140
PAINEWEBBER INC. FBO BREWER, LESLIE IRA                                                         140                 140
PAINEWEBBER INC. FBO CAROL SHRIBER IRA                                                          140                 140
PAINEWEBBER INC. FBO CRONIN, TERRENCE DR. IRA                                                   561                 561
PAINEWEBBER INC. FBO CROSSLAND, MERLE F IRA                                                     140                 140
PAINEWEBBER INC. FBO DAVENPORT, JEAN MCLEAN                                                     140                 140
PAINEWEBBER INC. FBO DUNN, WILLIAM W IRA                                                        140                 140
PAINEWEBBER INC. FBO FOLEY, TIMOTHY W DR. IRA                                                   140                 140
PAINEWEBBER INC. FBO GERIAK, JAMES W. IRA                                                       280                 280
PAINEWEBBER INC. FBO HANDY, PETER                                                               140                 140
PAINEWEBBER INC. FBO MICHIGAN AVENUE NAT'L BANK FBO JACK M. BUFFINGTON HR-10                    280                 280
PAINEWEBBER INC. FBO PAUL, IRVING A IRA                                                         140                 140
PAINEWEBBER INC. FBO ROGERS, JOHN W                                                             140                 140
PAINEWEBBER INC. FBO ROSE, PAUL F                                                               140                 140
PAINEWEBBER INC. FBO RUCINSKI, TIM SEP IRA                                                      140                 140
PAINEWEBBER INC. FBO SECURITY PACIFIC TRUSTEE FOR ROBERT L. SHIPP SR. IRA                       561                 561
PAINEWEBBER INC. FBO SLEEPER, MITCHELL IRA                                                      280                 280
PAINEWEBBER INC. FBO WAHLERT, ROBERT C/O FDL FOODS                                              140                 140
PAINEWEBBER INC. FBO WEST, DOUGLAS M IRA                                                        140                 140
PAINEWEBBER TRUST COMPANY METZGER, FRANK C KEOGH                                                140                 140
PAINEWEBBER TRUST COMPANY FBO GILMER, JOHN H KEOGH                                              140                 140
PATCH, RICHARD A                                                                                140                 140
PATHOLOGY ASSOCIATES INC TTEE FBO FRANK B KIMBAL PROFIT SHARING PLAN                            140                 140
PATTON, EUGENE J                                                                                561                 561
PEARSON, HAI                                                                                      1                   1
PEDIATRICS & ADOLESCENT MEDICINE INC. MONEY PURCHASE PLAN & TRUST ATTN: E. LITWER               140                 140
PENFOLD, MARGARET                                                                               561                 561
PENGUE, M. LOUIS (2)                                                                          7,719               7,719
PENN, FRANK R                                                                                   140                 140
PENOBSCOT RESPIRATORY PENSION PLAN FBO EDWARD M. HARROW                                         140                 140
PETRIK, JACK S                                                                                  140                 140
PHILLIPS, JAMES W                                                                               280                 280
<PAGE>
PICKETT, JAMES M                                                                                 49                  49
PISTOLE, MICHAEL DEFINED CONT PENSION PLAN EMPLOYEE OF MICHALE PISTOLE                          140                 140
POLAVRAPU, VENUGOPALAKRISHNA POLAVRAPU, ARUNA JTWROS                                            140                 140
POPS, RICHARD F                                                                                  37                  37
PRATER, LETHA M                                                                                 140                 140
PREIS, WILLIAM PREIS, IRENE M. JTWROS                                                           140                 140
PRINGLE COMPANY, THE ATTN: ROGER PRINGLE                                                        563                 563
PRINSTER, LEO T                                                                                 561                 561
PULMONARY MEDICINE ASSOCIATES PROFIT SHARING PLAN FBO JOSEPH HENRY                              280                 280
PULVARI, CHARLES F                                                                              140                 140
RANDLES, THOMAS L                                                                               140                 140
RAVENDHRAN, NATARAJAN DR                                                                        140                 140
RAYTHEON COMPANY ATTN: DAVE DWELLEY VP OF STRATEGIC BUS. DEVELOP                             90,485              90,485
READING, AGNES PEARSON TTEE FOR THE AGNES PEARSON READING REVOCABLE TRUST U/A/D                 140                 140
6-26-94
REDDY, KUMAR S                                                                                  140                 140
REED, JACK W                                                                                    140                 140
REIDENBACH, FREDERICK N                                                                         140                 140
RETIREMENT ACCOUNTS, INC FBO IRWIN, RONALD B IRA                                                140                 140
RETIREMENT ACCOUNTS, INC. FBO IRWIN, MERRY E IRA                                                140                 140
RILEY, LAURA                                                                                    561                 561
RISK, JOHN W. TTEE JOHN W. RISK LIVING TRUST C/O PAM MOTLAGH - FORD MOTOR CO                    140                 140
RIVERS, ROBERT RIVERS, DOREEN JTTEN                                                             140                 140
ROBINSON, PATRICIA                                                                              280                 280
ROSS, MICHAEL J. ROSS, JENNIFER COMM PROP                                                       140                 140
ROSSI, ROBERT A                                                                                 140                 140
ROTH, KATHLEEN                                                                                  140                 140
ROTHMAN, PAUL                                                                                   280                 280
RUCINSKI, TIMM                                                                                  561                 561
RUFENER RAYMOND E.  RUFENER, MARTHA J. JTWROS                                                   140                 140
RUTIGLIANO, ESTATE OF CHARLES R                                                                  17                  17
RUTLAND, GEORGE                                                                                   5                   5
SAHARIA, PRAKASH C. SAHARIA, REETA JT TEN                                                       140                 140
SALIBA, RUTH                                                                                    140                 140
<PAGE>
SALZMAN, JEFFREY                                                                                421                 421
SANCHALA, VAJUBHAI DR. SANCHALA, SARSLOATI JTWROS                                               140                 140
SAWYER JR., W. TOM                                                                              561                 561
SAYEGH, JOSEPHINE                                                                               140                 140
SAYEGH, PAUL                                                                                    140                 140
SCHLOTZHAUER, DALE E                                                                          5,435               5,435
SCHLOTZHAUER, DALE ELIZABETH                                                                 23,158              23,158
SCHLOTZHAUER, DALE ELIZABETH                                                                     19                  19
SCHLOTZHAUER, DALE ELIZABETH                                                                     19                  19
SCHMIDT, PAUL SCHMIDT, KATHLEEN JT TEN                                                          140                 140
SEITZ, DANIEL WARD                                                                              280                 280
SHAW, OLIVER TRUSTEE FBO OLIVER SHAW LIVING TRUST DTD 9/12/91                                   280                 280
SHEPELA, JOSEPH C. SHEPELA, KAREN S. TTEES SHEPELA FAMILY TRUST                                 280                 280
SHEPHERD, JAMES W                                                                                 1                   1
SIMPSON, STANLEY S. SIMPSON, WENDY S                                                            280                 280
SKARSTON, ROGER A                                                                               280                 280
SMAHA, AL                                                                                       140                 140
SMITH & QUIMBY PARTNERSHIP C/O COLONIAL CARPETS                                                 140                 140
SMITH, DONALD LITTLEFIELD AND SMITH ASSOCIATES                                                    1                   1
SODERLAND, ROBERT A. TTEE ROBERT A. SODERLAND LIVING TRUST                                      140                 140
SOLTESZ, LADISLAO (LES)                                                                          49                  49
SOUTHERN ARIZONA ANESTESIA SERVICE PC MON PUR PEN PL&TR AGMT UAD 7-11-85 FBO                    140                 140
RONALD W YAKAITIS
SPAULDING, C. ARTHUR TTEE C. ARTHUR SPAULDING LVG TRUST                                         140                 140
SPIGELMIRE, EILEEN C                                                                            140                 140
SPOKANE RADIATION ONCOLOGY ASSOCIATES PROFIT SHARING PLAN FBO DONALD A. SCHMUTZ,                140                 140
M.D
STANTON S. BERMAN MD PS PROFIT SHARING PLAN                                                     140                 140
STATE FARM MUTUAL INSURANCE CO. ATTN: JOHN CONCKLIN INVESTMENT DEPARTMENT                    10,413              10,413
STEIN, H. THOMAS STEIN, MADLYN W. JTWROS                                                        140                 140
STEVENS, KENNY                                                                                  561                 561
STEVENS, RONALD W. STEVENS, ROSEMARY N. JTWROS                                                  561                 561
STRONG, F. CALVERT                                                                              140                 140
STRONG, F. CALVERT & SMISSEN, PATRICIA JOAN CO-TTES OF THE                                      140                 140
FRANCIS L. BUFFUM REV LIV TR UAD 12/9/92
<PAGE>
SUSZ, MARK A. C/O INTER STATE SERVICE INC                                                       561                 561
SWANSON, MICHAEL SWANSON, MARTHA JTWROS                                                         140                 140
TESTA, ESTHER C. REVOCABLE TRUST                                                                140                 140
THE VICTOR FREEMAN INC PROFIT SHARING PLAN                                                      140                 140
THOMPSON, HUGH C. III                                                                           140                 140
THORNER, BRITTMARIE                                                                             140                 140
TOONE,EUGENE&WENAAS, JOHN E.J. COTTEES ARIZONA ORAL & MAXILLOFACIAL SURGEONS, P.C               140                 140
PSP DTD 5-1-72 FBO: JOHN E.J. WENAAS
TOUCHSTONE, BLAKE                                                                               561                 561
TRUSLOW, CAROLINE                                                                               280                 280
UDY, DOYLE C                                                                                    280                 280
UNION VENTURE CORPORATION ATTN: MIKE NAKAMA                                                   1,919               1,919
WALKER, HOWARD A                                                                                561                 561
WALLER, WILLIAM                                                                                 140                 140
WANG, ELISE T                                                                                    27                  27
WARD, JOHN M                                                                                    140                 140
WARTHMAN, FORREST                                                                               140                 140
WASHINGTON, J. BARRY                                                                            140                 140
WEBSTER, FRANK A. FBO JONATHAN A. WEBSTER CUST                                                  140                 140
WEEDEN CAPITAL MANAGEMENT ATTN: TOM FLAHERTY                                                    220                 220
WEINER, LAWRENCE WEINER, JOAN JT TEN                                                            140                 140
WEINER, STANFORD A                                                                              140                 140
WEISS, WILLIAM J. WEISS, LOLA W                                                                 561                 561
WEISSBERG, GLORIA                                                                               561                 561
WELCH, HENRY W. TTEE FOR THE EDITH H. WELCH FAMILY TRUST DTD 12/29/83                           280                 280
WESTMINSTER MEMORIAL PARK INC                                                                   140                 140
WESTMORELAND, WILLIAM                                                                         3,860               3,860
WIATER, JEROME P. MDPC                                                                          140                 140
WILKINSON, LAWRENCE                                                                             140                 140
WILLIAM T. MCGURN INC. PENSION PLAN AND TRUST                                                   140                 140
WILLIAM T. MCGURN INC. PROFIT SHARING PLAN & TRUST                                              140                 140
WILLIAMS, LESLIE L                                                                              140                 140
WILLSON, J. G. JR PARTNER JGW & COMPANY                                                         140                 140
WILSON, DOROTHY                                                                                   4                   4
WILSON, GEORGE                                                                                   43                  43
WILSON, GEORGE R. TRUSTEE FOR CHERYL WILSON                                                       1                   1
<PAGE>
WILSON, GEORGE R. TRUSTEE FOR CURTIS WILSON                                                       1                   1
WILSON, GEORGE R. TRUSTEE FOR DAVID WILSON                                                        1                   1
WILSON, GEORGE R. TRUSTEE FOR JILL WILSON                                                         1                   1
WITT, AXEL WITT, MARGARET                                                                       561                 561
WOO, DONNA JUNG                                                                                  50                  50
WOODSON, RONALD G. M.D. TTEE RONALD G. WOODSON,M.D. INC PROFIT SHARING PLAN                     140                 140
XANDER, ALBERT                                                                                  140                 140
YEDDIS, ABE & BARBARA TEN ENT                                                                   140                 140
YERKES, DOUGLAS D                                                                               561                 561
YOAKAM, ROBERT E                                                                                841                 841
YOCUM, MARTIN D. PHYLLIS D YOCUM COMM PROP                                                      280                 280
YOUNG, WILLIAM D. YOUNG, SHARYN JT TEN                                                          280                 280
ZICKUS, DONALD C                                                                                140                 140
                                                                                          ---------            --------
                                                                                            804,407             804,407
                                                                                          =========            =========
<FN>

- -----------------
(1)  None  of  the  Selling  Shareholders  beneficially  owns 1% or  more of the
     Company's  Common  Stock,  except for BIT Holding,  LTD which if all Shares
     were distributed to BIT's  stockholders,  would own approximately  1.08% of
     the Company's Common Stock.
(2)  This  selling  shareholder  serve  as  an  employee  of  BIT  prior  to the
     Company's  acquisition of certain assets of BIT and currently  serves as an
     employee of a subsidiary of the Company.
</FN>
</TABLE>

                              PLAN OF DISTRIBUTION

         The shares of Common Stock covered hereby may be distributed  from time
to time by BIT to the Selling Shareholders,  or sold or distributed from time to
time by or for  the  account  of BIT or the  Selling  Shareholders.  BIT and the
Selling  Shareholders  will act independently of the Company in making decisions
with respect to their respective sales of the shares.

         The  Selling  Shareholders  may sell or  distribute  some or all of the
Shares  from time to time  through  underwriters  or dealers or brokers or other
agents or directly to one or more purchasers, in transactions (which may involve
block  transactions)  on Nasdaq,  privately  negotiated  transactions  or in the
over-the-counter  market,  or  in  a  combination  of  such  transactions.  Such
transactions  may be  effected  by the  Selling  Shareholders  at market  prices
prevailing  at the time of sale,  at prices  related to such  prevailing  market
prices, at negotiated prices, or at fixed prices, which may be changed. Brokers,
dealers, agents or underwriters  participating in such transactions as agent may
receive  compensation in the form of discounts,  concessions or commissions from
the Selling  Shareholders  (and,  if they act as agent for the purchaser of such
shares,  from such  purchaser).  Usual and customary or specifically  negotiated
brokerage  fees  or  commissions  may be  paid by the  Selling  Shareholders  in
connection with such sales.
<PAGE>
         The Selling Shareholders and any such underwriters, brokers, dealers or
agents that participate in such  distribution may be deemed to be "underwriters"
within the meaning of the  Securities  Act, and any  discounts,  commissions  or
concessions received by any such underwriters,  brokers, dealers or agents might
be deemed to be underwriting discounts and commissions under the Securities Act.
Neither the Company nor the Selling  Shareholders  can  presently  estimate  the
amount of such  compensation.  The  Company  knows of no  existing  arrangements
between any Selling Shareholder and any other Selling Shareholder,  underwriter,
broker,  dealer  or other  agent  relating  to the sale or  distribution  of the
Shares.

         Under  applicable  rules and  regulations  under the Exchange  Act, any
person  engaged in a  distribution  of any of the Shares may not  simultaneously
engage in market  activities  with  respect to the Common  Stock for a period of
nine business days prior to the commencement of such  distribution.  In addition
and without limiting the foregoing,  the Selling Shareholders will be subject to
applicable  provisions  of the  Exchange  Act  and  the  rules  and  regulations
thereunder,  including without  limitation Rules 10b-5,  10b-6 and 10b-7,  which
provisions  may limit the timing of purchases  and sales of any of the Shares by
the Selling  Shareholders.  All of the foregoing may affect the marketability of
the Common Stock.

         The Company will pay substantially all of the expenses incident to this
Offering  of the Shares by the  Selling  Shareholders  to the public  other than
commissions and discounts of underwriters, brokers, dealers or agents.


                          DESCRIPTION OF CAPITAL STOCK

         The  authorized  capital  stock of the Company  consists of  50,000,000
shares of Common Stock, no par value, 5,000,000 shares of undesignated Preferred
Stock,  no par value,  and 405,916  shares of Series D Preferred  Stock,  no par
value.

         The  following  summary of certain  provisions  of the Common Stock and
Preferred Stock does not purport to be complete and is subject to, and qualified
in its entirety by, the  provisions of the Company's  Articles of  Incorporation
and by the provisions of applicable law.

Common Stock

         Subject  to  preferences  that  may be  applicable  to any  outstanding
Preferred  Stock which may be issued in the future,  the holders of Common Stock
are entitled to receive ratably such non-cumulative dividends, if any, as may be
declared  from  time to time by the  Board of  Directors  out of  funds  legally
available  therefor.  The Common Stock has no preemptive or conversion rights or
other  subscription  rights.  There are no redemption or sinking fund provisions
available to the Common  Stock.  The holders of Common Stock are entitled to one
vote per share on all matters to be voted upon by the shareholders,  except that
upon  giving  the  notice  required  under  the  California  Corporations  Code,
shareholders may cumulate their votes in the election of directors. In the event
of a  liquidation,  dissolution  or winding up of the  Company,  the  holders of
Common Stock are entitled to share ratably in all assets remaining after payment
of liabilities,  subject to liquidation preferences,  if any, of Preferred Stock
which may be issued in the future.  All  outstanding  shares of Common Stock are
fully paid and non-assessable.
<PAGE>
Preferred Stock

                  The Board of  Directors  of the Company has the  authority  to
issue up to  5,000,000  shares of  undesignated  Preferred  Stock in one or more
series, to fix the rights,  preferences,  privileges and restrictions granted to
or imposed upon any wholly  unissued series of Preferred  Stock,  and to fix the
number of shares  constituting  any series and the  designations of such series,
without any further vote or action by the shareholders.  The Board of Directors,
without Common Stock  shareholder  approval,  can issue  undesignated  Preferred
Stock with voting and conversion  rights which could adversely affect the voting
power of the holders of Common  Stock.  The issuance of  undesignated  Preferred
Stock may have the  effect of  delaying,  deferring  or  preventing  a change in
control  of  the  Company.  There  are no  outstanding  shares  of  undesignated
Preferred Stock.

                  The shares of Series D Preferred Stock were authorized  before
the  Company's  initial  public  offering . There are no  outstanding  shares of
Series D Preferred  Stock and the Company has no intention of issuing  shares of
Series D Preferred Stock.

Rights of Holders of Special Shares of PMC-Sierra, Inc.

         The Special Shares of PMC-Sierra,  Inc. are redeemable for Common Stock
of the Company.  Special Shares do not have voting rights in the Company, but in
all other respects they represent the economic and functional  equivalent of the
Common  Stock of the Company for which they can be  redeemed.  Under  applicable
law,  each class of Special  Shares  will have  class  voting  rights in certain
circumstances  with respect to transactions  that effect the rights of the class
and for  certain  extraordinary  corporate  transactions.  Two kinds of  Special
Shares are outstanding: A Special Shares and B Special Shares.


                                  LEGAL MATTERS

         The validity of the Shares  offered  hereby will be passed upon for the
Company by Wilson Sonsini Goodrich & Rosati, Professional Corporation.


                                     EXPERTS

         The   consolidated   financial   statements   and  schedule  of  Sierra
Semiconductor  Corporation  included in the Sierra  Semiconductor  Corporation's
Annual  Report  (Form  10-K) for the year ended  December  31,  1996,  have been
audited by Ernst & Young LLP, independent auditors, as set forth in their report
included  therein  and  incorporated  herein  by  reference.  Such  consolidated
financial  statements are incorporated by reference herein in reliance upon such
reports  given upon the  authority  of such firm as experts  in  accounting  and
auditing.

<PAGE>

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

              ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

         The following  table sets forth the expenses  payable by the Registrant
in connection with the filing of this Registration Statement (1).


Securities and Exchange Commission Filing Fee                      $  3,001.29

Nasdaq Additional Listing Fee                                       $10,240.00

Printing and Engraving Expenses                                             --

Legal Fees and Expenses                                            $  5,000.00

Accounting Fees and Expenses                                       $  5,000.00

Blue Sky Fees and Expenses                                                  --

Transfer Agent and Registration Fees                               $  1,000.00

Miscellaneous expenses                                             $  1,758.71
                                                                   -----------
Total                                                              $ 26,000.00
                                                                   ============

- ----------------------
(1)  All of such  expenses,  other than the filing  fee for the  Commission, are
estimates and are subject to future contingencies.

ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         Section 317 of the California  Corporations  Code authorizes a court to
award,  or a corporation's  board of directors to grant,  indemnity to directors
and officers in terms  sufficiently broad to permit such  indemnification  under
certain  circumstances  for liabilities  (including  reimbursement  for expenses
incurred)  arising under the Securities Act. The Company's  Restated Articles of
Incorporation and Bylaws provide for indemnification of its directors, officers,
employees  and other agents to the maximum  extent  permitted by the  California
Corporations  Code.  In addition,  the Company has entered into  Indemnification
Agreements with its officers and directors.

         Insofar as indemnification for liabilities arising under the Securities
Act may be  permitted to  directors,  officers  and  controlling  persons of the
Company  pursuant  to the  California  Corporation  Law  and the  Bylaws  of the
Company, the Company has been informed that in the opinion of the Securities and
Exchange  Commission such  indemnification is against public policy as expressed
in the Securities Act and is therefore unenforceable.
<PAGE>

ITEM 16.  EXHIBITS

         The  following   exhibits  are  filed  as  part  of  this  Registration
Statement:

         NUMBER EXHIBIT DESCRIPTION

         5.1          Opinion of Counsel as to the validity of the Shares.*

         23.1         Consent of Counsel (included in Exhibit 5.1 above).*

         23.2         Consent of Ernst & Young LLP.

         * Previously Filed

         ITEM 17.  UNDERTAKINGS.

         (a)    The undersigned Registrant hereby undertakes:

                  (1) To file,  during any  period in which  offers or sales are
being made, a post-effective amendment to this Registration Statement:

                           (i)     To include any prospectus required by Section
                                   10(a)(3) of the Securities Act;

                           (ii)    To  reflect in  the  prospectus  any facts or
                                   events  arising after the  effective  date of
                                   this  Registration  Statement  (or  the  most
                                   recent   post-effective   amendment  thereof)
                                   which,  individually  or  in  the  aggregate,
                                   represent   a   fundamental   change  in  the
                                   information  set  forth in this  Registration
                                   Statement;

                           (iii)   To  include  any  material  information  with
                                   respect  to  the  plan  of  distribution  not
                                   previously  disclosed  in  this  Registration
                                   Statement  or any  material  change  to  such
                                   information in this Registration Statement.

         Provided,  however,  that paragraphs  (a)(1)(i) and (a)(1)(ii) above do
not  apply  if the  information  required  to be  included  in a  post-effective
amendment by these  paragraphs  is contained in periodic  reports  filed with or
furnished by the Registrant  pursuant to Section 13 or 15(d) of the Exchange Act
that are incorporated by reference in this Registration Statement.

                  (2) That, for the purpose of determining  any liability  under
the Securities Act, each such  post-effective  amendment shall be deemed to be a
new registration  statement  relating to the securities  offered herein, and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

                  (3) To remove from  registration by means of a  post-effective
amendment  any of the  securities  being  registered  which remain unsold at the
termination of the Offering.

         (b) The undersigned  Registrant hereby undertakes that, for purposes of
determining  any  liability  under  the  Securities  Act,  each  filing  of  the
Registrant's  annual  report  pursuant to Section  13(a) or Section 15(d) of the
Exchange Act that is  incorporated by reference in this  Registration  Statement
shall be deemed to be a new  registration  statement  relating to the securities
offered herein, and the offering of such securities at that time shall be deemed
to be the initial bona fide offering thereof.
<PAGE>
         (c)  Insofar  as  indemnification  for  liabilities  arising  under the
Securities Act may be permitted to directors,  officers and controlling  persons
of the  Registrant  pursuant to the  foregoing  provisions,  or  otherwise,  the
Registrant  has  been  advised  that  in  the  opinion  of the  Commission  such
indemnification  is against public policy as expressed in the Securities Act and
is,  therefore,  unenforceable.  In the event  that a claim for  indemnification
against such  liabilities  (other than the payment by the Registrant of expenses
incurred or paid by a director,  officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director,  officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as  expressed  in the  Securities  Act and will be  governed by the final
adjudication of such issue.

<PAGE>


                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the  requirements  for  filing  on  Form  S-3 and has  duly  caused  this
registration  statement or  amendment  thereto to be signed on its behalf by the
undersigned,  thereunto  duly  authorized,  in the  City of San  Jose,  State of
California, on May 6, 1997.


                                     SIERRA SEMICONDUCTOR CORPORATION

                                     By: /s/ GLENN C. JONES
                                     ---------------------------------- 
                                     Glenn C. Jones
                                     Chief Financial Officer and
                                     Senior Vice President, Finance 
                                    (Principal Financial and Accounting Officer)
                                    (Duly Authorized Officer)

         Pursuant to the requirements of the Securities Act of 1933, as amended,
this  registration  statement  or  amendment  thereto  has  been  signed  by the
following persons in the capacities and on the dates indicated.

   Signature                          Title                           Date
   ---------                          -----                           ----


/S/ JAMES V. DILLER*            Chief Executive Officer           May 6, 1997
 ---------------------         (Principal Executive Officer
James V. Diller                 Chairman of the Board of 
                                Directors
      

/S/ GLENN C. JONES              Senior Vice President, Finance    May 6, 1997
- ----------------------          and Chief Financial Officer 
Glenn C. Jones                 (Principal Financial and 
                                Accounting Officer)
     

/S/ALEXANDRE BALKANSKI*         Director                          May 6, 1997
- ----------------------
Alexandre Balkanski


/S/ MICHAEL L. DIONNE*          Director                          May 6, 1997
- ----------------------
Michael L. Dionne


/S/ FRANK J. MARSHALL*          Director                          May 6, 1997
- ----------------------
Frank J. Marshall
      


* BY: /S/ GLENN C. JONES
- --------------------------
Glenn C. Jones, Attorney-in-fact



<PAGE>


                                  EXHIBIT INDEX


                           NUMBER EXHIBIT DESCRIPTION

                       23.2 Consent of Ernst & Young LLP.

                                                                   Exhibit 23.2

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We  consent to the  reference  of our firm under the  caption  "Experts"  in the
Registration Statement (Form S-3) and related Prospectus of Sierra Semiconductor
Corporation  for the  registration  of 804,407 shares of its common stock and to
the  incorporation by the reference therein of our report dated January 22, 1997
with respect to the  consolidated  financial  statements and schedules of Sierra
Semiconductor Corporation included in its Annual Report (Form 10-K) for the year
ended December 31, 1996, filed with the Securities and Exchange Commission.



                                                  /s/ Ernst & Young LLP
                                                  ------------------------------
                                                  ERNST & YOUNG LLP


San Jose, California
May 2, 1997


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