AMDAHL CORP
SC 13G/A, 1994-04-07
ELECTRONIC COMPUTERS
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SCHEDULE 13G

Amendment No. 1
Amdahl Corporation
common stock
Cusip # 023905102
Filing Fee: No


Cusip # 023905102
Item 1:	Reporting Person - FMR Corp. - (Tax ID:  04-2507163)
Item 4:	Commonwealth of Massachusetts
Item 5:	178,828
Item 6:	None
Item 7:	14,016,150
Item 8:	None
Item 9:	14,016,150
Item 11:	12.24%
Item 12:	HC 




Cusip # 023905102
Item 1:	Reporting Person - Edward C. Johnson 3d - (Tax ID:  ###-##-####)
Item 4:	United States of America
Item 5:	None
Item 6:	None
Item 7:	14,016,150
Item 8:	None
Item 9:	14,016,150
Item 11:	12.24%
Item 12:	IN 




SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)


Item 1(a).	Name of Issuer:

		Amdahl Corporation

Item 1(b).	Name of Issuer's Principal Executive Offices:

		1250 East Arques Avenue
		Sunnyvale, CA  94088

Item 2(a).	Name of Person Filing: 

		FMR Corp.

Item 2(b).	Address or Principal Business Office or, if None, Residence:

		82 Devonshire Street, Boston, Massachusetts  02109

Item 2(c).	Citizenship:

		Not applicable

Item 2(d).	Title of Class of Securities:

		Common Stock

Item 2(e).	CUSIP Number:  

		023905102

Item 3.	This statement is filed pursuant to Rule 13d-1(b) or 13d-2(b) and the 
person filing, FMR Corp., is a parent holding company in accordance 
with Section 240.13d-1(b)(ii)(G).  (Note:  See Item 7).

Item 4.	Ownership

	(a)	Amount Beneficially Owned:
	14,016,150

	(b)	Percent of Class:
	12.24%

	(c)	Number of shares as to which such person has:  

	(i)	sole power to vote or to direct the vote:
	178,828

	(ii)	shared power to vote or to direct the vote:
	None

	(iii)	sole power to dispose or to direct the disposition of:
	14,016,150

	(iv)	shared power to dispose or to direct the disposition 
of:	None




Item 5.	Ownership of Five Percent or Less of a Class.

	Not applicable.

Item 6.	Ownership of More than Five Percent on Behalf of Another Person.

	Various persons have the right to receive or the power to 
direct the receipt of dividends from, or the proceeds from 
the sale of, the common stock of Amdahl Corporation.  The 
interest of one person, Fidelity Magellan Fund, an 
investment company registered under the Investment Company 
Act of 1940, in the common stock of Amdahl Corporation, 
amounted to 9,616,800 shares or 8.40% of the total 
outstanding common stock at March 31, 1994.  

Item 7.	Identification and Classification of the Subsidiary Which Acquired 
the Security Being Reported on By the Parent Holding Company.

	See attached Exhibit(s) A and B.

Item 8.	Identification and Classification of Members of the Group.

	Not applicable, see attached Exhibit A. 

Item 9.	Notice of Dissolution of Group.

	Not applicable.


Item 10.	Certification.

	By signing below I certify that, to the best of my knowledge and 
belief, the securities referred to above were acquired in the 
ordinary course of business and were not acquired for the purpose 
of and do not have the effect of changing or influencing the 
control of the issuer of such securities and were not acquired in 
connection with or as a participant in any transaction having such 
purpose or effect.


Signature

	After reasonable inquiry and to the best of my knowledge and 
belief, I certify that the information set forth in this statement 
is true, complete and correct. 



	April 8, 1994	
Date



	/s/Arthur S. Loring
Signature



	Arthur S. Loring, Vice President
	
Name/Title




SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)

	Pursuant to the instructions in Item 7 of Schedule 13G, Fidelity 
Management & Research Company ("Fidelity"), 82 Devonshire Street, Boston, 
Massachusetts 02109, a wholly-owned subsidiary of FMR Corp. and an 
investment adviser registered under Section 203 of the Investment Advisers 
Act of 1940, is the beneficial owner of 13,837,322 shares or 12.08% of the 
common stock outstanding of Amdahl Corporation ("the Company") as a result 
of acting as investment adviser to several investment companies registered 
under Section 8 of the Investment Company Act of 1940.  

	The ownership of one investment company, Fidelity Magellan Fund, 
amounted to 9,616,800 shares or 8.40% of the common stock outstanding.  
Fidelity Magellan Fund has its principal business office at 82 Devonshire 
Street, Boston, Massachusetts 02109.  

	Edward C. Johnson 3d, FMR Corp., through its control of Fidelity, and 
the Funds each has sole power to dispose of the 13,837,322 shares owned by 
the Funds.

	Neither FMR Corp. nor Edward C. Johnson 3d, Chairman of FMR Corp., has 
the sole power to vote or direct the voting of the shares owned directly by 
the Fidelity Funds, which power resides with the Funds' Boards of Trustees.  
Fidelity carries out the voting of the shares under written guidelines 
established by the Funds' Boards of Trustees.

	Fidelity Management Trust Company, 82 Devonshire Street, Boston, 
Massachusetts 02109, a wholly-owned subsidiary of FMR Corp. and a bank as 
defined in Section 3(a)(6) of the Securities Exchange Act of 1934, is the 
beneficial owner of 178,828 shares or 0.16% of the common stock outstanding 
of the company as a result of its serving as investment manager of the 
institutional account(s).  

	FMR Corp., through its control of Fidelity Management Trust Company, 
has sole voting and dispositive power over 178,828 shares of common stock 
owned by the institutional account(s) as reported above.

	Edward C. Johnson 3d owns 34.0% of the outstanding voting common stock 
of FMR Corp.  Mr. Johnson 3d is Chairman of FMR Corp.  Various Johnson 
family members and trusts for the benefit of Johnson family members own FMR 
Corp. voting common stock.  These Johnson family members, through their 
ownership of voting common stock, form a controlling group with respect to 
FMR Corp.



SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)

RULE 13d-1(e)  AGREEMENT

	The undersigned persons, on April 8, 1994, agree and consent to the 
joint filing on their behalf of this Schedule 13G in connection with their 
beneficial ownership of the common stock of Amdahl Corporation at March 31, 
1994.

	FMR Corp.
	By	/s/Arthur S. Loring
Arthur S. Loring
Vice President - Legal
		Edward C. Johnson 3d
	By	/s/Arthur S. Loring
Arthur S. Loring
Under Power of Attorney 
dated 5/17/89
On File with Schedule 13G 
for
Airborne Freight Corp. 
9/10/91
	Fidelity Management & Research Company
	By	/s/Arthur S. Loring
Arthur S. Loring
Sr. V.P. and General 
Counsel
	Fidelity Magellan Fund
	By	/s/Arthur S. Loring
Arthur S. Loring
Secretary



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