================================================================================


                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549
                              --------------------

                                   FORM 10-Q/A

                                 AMENDMENT NO. 1

(Mark one)

[ X ]  Quarterly  Report  Pursuant  to  Section  13 or 15(d)  of the  Securities
Exchange Act of 1934 For the quarterly period ended June 28, 1997

                                       OR

[ ] Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange
Act of 1934 For the transition period from _______________________ to
--------------------------

                          Commission File Number 1-7352
                         ------------------------------

                            Data General Corporation
             (Exact name of registrant as specified in its charter)



           Delaware                                      04-2436397
          ----------                                    ------------
(State or other jurisdiction             (I.R.S Employer Identification Number)
of incorporation or organization)


4400 Computer Drive, Westboro, Massachusetts                01580
---------------------------------------------            ----------
 (Address of principal executive offices)                (Zip Code)

        Registrant's telephone number, including area code (508) 898-5000
                                                           --------------

Former name, former address and former fiscal year if changed since last report:
Not Applicable

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

      Indicate by check mark  whether the  registrant  (1) has filed all reports
    required to be filed by Section 13 or 15(d) of the  Securities  Exchange Act
    of 1934 during the preceding 12 months (or for such shorter  period that the
    registrant was required to file such  reports),  and (2) has been subject to
    such filing requirements for the past 90 days.

                                    Yes X No
                                       ---  ---
Number of  shares  outstanding  of each of the  registrant's  classes  of common
stock, as of July 25, 1997:

  Common Stock, par value $.01                             41,348,441
  ----------------------------                             ----------
    (Title of each class)                               (Number of shares)

================================================================================

<PAGE>

Item 6.  Exhibits and Reports on Form 8-K.

     This section is amended and restated in its entirety.

     (a)  Exhibits:

         4.  (d) Indenture,  dated as of May 21, 1997,  between the Company and
                 The Bank of New York filed by the Company on Form S-3 dated
                 June 27, 1997 is incorporated by reference.

             (e) Registration Rights Agreement dated as of May 15, 1997 by and
                 among the Company, Morgan Stanley and Co.Incorporated and
                 Dillon, Read & Co. Inc. filed by the Company on Form S-3 dated
                 June 27, 1997 is incorporated by reference.

        10. (dd) Amendment dated May 19, 1997 to Letter of Credit and
                 Reimbursement Agreement

        11.     Computation of primary and fully diluted earnings per share.

    (b)  Reports on Form 8-K

           The  Company  filed a  report  on Form  8-K on May  15,  1997,  which
included a copy of a press release  regarding  the sale of $212.8  million of 6%
Convertible  Subordinated  Notes due 2004 and the retirement of $23 million of 8
3/8% Sinking Fund Debentures due 2002.

         The Company filed a report on Form 8-K on July 21, 1997, which included
a copy of a press  release  regarding  the  retirement of $125 million of 7 3/4%
Convertible Subordinated Debentures due 2001.


<PAGE>







                                    SIGNATURE



        Pursuant to the requirements of the Securities Exchange Act of 1934, the
   registrant  has duly  caused  this  report to be signed on its  behalf by the
   undersigned thereunto duly authorized.



                                         DATA GENERAL CORPORATION
                                               (Registrant)


                                           /s/ Arthur W. DeMelle
                                  ----------------------------------------
                                               Arthur W. DeMelle
                                             Senior Vice President
                                            Chief Financial Officer



    Dated:  August 11, 1997





<PAGE>






                                    EXHIBITS


Index to Exhibits.

      This section is amended and restated in its entirety.

      4.  (d)    Indenture,  dated as of May 21, 1997,  between the Company
                 and The Bank of New York filed by the Company on Form S-3 dated
                 June 27, 1997 is incorporated by reference.

          (e)    Registration Rights Agreement dated as of May 15, 1997 by and
                 among the Company, Morgan Stanley and Co. Incorporated and
                 Dillon, Read & Co. Inc. filed by the Company on Form S-3 dated
                 June 27, 1997 is incorporated by reference.

    10.  (dd)    Amendment dated May 19, 1997 to Letter of Credit and
                 Reimbursement Agreement

    11.          Computation of primary and fully diluted earnings per share.



<PAGE>