<PAGE>

                                                                EXHIBIT 10.25(a)

                                    AMENDMENT

This is an Amendment to the Technology Development and License Agreement
("Agreement") entered into as of October 1, 1998 by and between Advanced Micro
Devices, Inc. and its Subsidiaries ("AMD"), a Delaware Corporation, with
principal offices located at One AMD Place, P.O. Box 3453, Sunnyvale, California
94088-3453, and Motorola, Inc. and its Subsidiaries ("Motorola"), a Delaware
corporation, with principal offices located at 1303 East Algonquin Road,
Schaumburg, Illinois 60196.

Add Section 1.40 as follows:

1.40  ***** a semiconductor manufacturing process wherein *****.  ***** may be
      used in conjunction with semiconductor manufacturing technologies such
      as Logic Process Technologies and Embedded Flash Technology.

Amend Section 5.1 as follows:

Change the first sentence to read "The parties will undertake Projects to
complete and develop Logic Process Technologies and ***** in conjunction with
Logic Process Technologies."

Add new Section 5.8 as follows:

     5.8  ***** Licenses.
          --------------

          (a)  The parties intend to create a Statement of Work on ***** and to
               collaborate on the remaining development of that technology.  It
               is anticipated that each party will make contributions to the
               development of that technology. Any contributions or Improvements
               to ***** developed solely by AMD will be deemed AMD Technology,
               subject to Motorola's rights in *****. Any contributions or
               Improvements to ***** developed solely by Motorola will be deemed
               Motorola Technology, subject to AMD's rights in *****.

          (b)  Motorola hereby grants to AMD under Motorola Intellectual
               Property a non-exclusive, non-transferable, worldwide, royalty-
               free (except as provided in Sections 6.5 and 6.6) license to:

               (i)    practice the methods and processes of ***** and Motorola
                      Improvements to *****,


CONFIDENTIAL                                                            Page 1

Confidential treatment has been requested for portions of this exhibit. The
copy filed herewith omits the information subject to the confidentiality
request. Omissions are designated as *****. A complete version of this exhibit
has been filed separately with the Securities and Exchange Commission.
<PAGE>

               (ii)   make, have made, use, import and sell devices manufactured
                      using ***** and Motorola Improvements to *****,

               (iii)  make Improvements to ***** and Derivative Processes using
                      ***** technology,

               (iv)   only with Motorola approval, such approval not to be
                      unreasonably withheld, undertake ***** within ***** after
                      the first commercial shipment of a product manufactured
                      using ***** and without approval,  undertake *****
                      thereafter with respect to ***** and sublicense the rights
                      granted in Section 5.8 (b)(i), (ii) and (iii) only as part
                      of such *****,

               (v)    only with Motorola approval, such approval not to be
                      unreasonably withheld, undertake ***** with respect to
                      ***** and sublicense the rights granted in Section 5.8
                      (b)(i),(ii) and (iii) only as part of such *****,

               (vi)   only with Motorola approval, such approval not to be
                      unreasonably withheld, undertake ***** with respect to
                      ***** and sublicense the rights granted in Section 5.8
                      (b)(i), (ii) and (iii) only as a part of such *****, and

               (vii)  only with Motorola approval, such approval not to be
                      unreasonably withheld, undertake ***** within *****
                      after the first commercial shipment of a product
                      manufactured using ***** and without approval, undertake
                      unlimited ***** thereafter with respect to ***** and
                      sublicense the rights granted in Section 5.8 (b)(i),
                      (ii) and (iii) only as a part of such *****, and

               upon the later of (i) first commercial shipment of a product
               manufactured using HIP7L  or (ii) ***** after the first
               commercial shipment of a product manufactured using HIP6L:

               (viii) undertake ***** with respect to ***** and sublicense the
                      rights granted in Section 5.8 (b)(i), (ii) and (iii)
                      only as part of such *****,

               (ix)   undertake ***** with respect to ***** and sublicense the
                      rights granted in Section 5.8 (b)(i), (ii) and (iii)
                      only as part of such *****,


CONFIDENTIAL                                                            Page 2

*****Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

               (x)    undertake ***** with respect to ***** and sublicense the
                      rights granted in Section 5.8 (b)(i), (ii) and (iii)
                      only as a part of such *****, and

               (xi)   undertake ***** with respect to ***** and sublicense the
                      rights granted in Section 5.8 (b)(i), (ii) and (iii)
                      only as a part of such *****.


          (c)  AMD hereby grants to Motorola under AMD Intellectual Property, a
               non-exclusive, non-transferable, worldwide, royalty-free license
               to:

               (i)    practice the methods and processes of ***** and AMD
                      Improvements to *****,

               (ii)   make, have made, use, import and sell devices manufactured
                      using ***** and AMD Improvements to *****,

               (iii)  make Improvements to ***** and Derivative Processes using
                      ***** technology,

               (iv)   undertake ***** with respect to ***** and sublicense the
                      rights granted in Section 5.8 (c)(i), (ii) and (iii)
                      only as part of such *****,

               (v)    undertake ***** with respect to ***** and sublicense the
                      rights granted in Section 5.8 (c)(i), (ii) and (iii)
                      only as part of such *****,

               (vi)   undertake ***** with respect to ***** and sublicense the
                      rights granted in Section 5.8 (c)(i), (ii) and (iii)
                      only as a part of such *****, and

               (vii)  undertake ***** with respect to ***** and sublicense the
                      rights granted in Section 5.8 (c)(i), (ii) and (iii)
                      only as a part of such *****.

          (d)  In the event that AMD exercises its rights granted by Motorola
               in Section 5.8(b) (iv)-(xi) Motorola will negotiate in good
               faith with such ***** for a license under Motorola patents
               essential to utilize ***** and Improvements thereto on
               reasonable terms, or, at Motorola's option, will represent and
               warrant to AMD that it will not assert it's patents essential
               to utilize ***** against the *****. In the event that Motorola
               enters into a patent license with, or covenants not to assert
CONFIDENTIAL                                                            Page 3

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

               its patents against, a ***** who received a ***** under *****
               as described in this Section, AMD will ***** from such *****
               upon the later of (i) first commercial shipment of a product
               manufactured using the combination of HIP7L and ***** or (ii)
               ***** after the first commercial shipment of a product
               manufactured using HIP6L.

          (e)  In the event that Motorola exercises its rights granted by AMD
               in Section 5.8(c) (iv)-(vii) AMD will negotiate in good faith
               with such ***** for a license under AMD patents essential to
               utilize ***** and Improvements thereto on reasonable terms, or,
               at AMD's option, will represent and warrant to Motorola that it
               will not assert it's patents essential to utilize ***** against
               the *****. In the event that Motorola enters into a patent
               license with, or covenants not to assert its patents against, a
               ***** who received a ***** under ***** as described in this
               Section, ***** from such ***** upon the later of (i) first
               commercial shipment of a product manufactured using the
               combination of HIP7L and ***** or (ii) ***** after the first
               commercial shipment of a product manufactured using HIP6L.

          (f)  AMD will assign engineers to work in agreed-upon wafer
               fabrication facilities of Motorola in order to gain an
               understanding of *****. AMD will install an ***** production
               process in AMD's *****. Motorola will train and support the AMD
               engineers with respect to ***** including but not limited to,
               disclosing all necessary information and know-how and providing
               all necessary documentation and technical support.

          (g)  The parties understand that Motorola may gain access to *****
               process or design information or know-how. In such event and
               provided it is legally permitted to do so, Motorola will
               disclose such information to AMD further provided that prior to
               any such disclosure i) Motorola describes in writing to AMD any
               restrictions placed upon Motorola or AMD by the ***** of such
               information or know-how as well as the identity of the *****,
               and (ii) AMD agrees in writing to the described restrictions.
               In the particular situation of Motorola entering into an
               agreement with ***** pertaining to ***** design information,
               AMD agrees that Section 5.8(g)(ii) above shall not apply and
               that AMD shall accept such restrictions.

          (h)  It is the further intent of the parties to jointly develop or
               to disclose to one another design information specific to the
               design of well-known, general purpose circuit block in *****
               technology. It is the intent of the parties that each shall be
               able to use such information to design and have designed
CONFIDENTIAL                                                           Page 4

***** Certain information on this page hgas been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

               semiconductor products. Notwithstanding the above, no licenses
               are granted by this Section to proprietary circuit blocks or
               designs of Motorola or AMD.

Replace Section 6.7 with the below new Section 6.7.

     6.7  HIP6F.
          -----

(a)  The parties will undertake one or more Projects and create a Statement of
     Work therefore of HIP6F and SGEFT and collaborate on the development of
     those technologies. It is anticipated that each party will make substantial
     contributions to the development of those technologies.  Any contributions
     or Improvements to HIP6F and SGEFT developed solely by AMD will be deemed
     AMD Technology, subject to Motorola's rights in HIP6F and SGEFT. Any
     contributions or Improvements to HIP6F and SGEFT developed solely by
     Motorola will be deemed Motorola Technology, subject to AMD's rights in
     HIP6F and SGEFT.  *****. In the event that the parties cannot agree on a
     Statement of Work for a Project hereunder within ***** of the execution of
     this Amendment, Sections 1.40, 5.8, this Section 6.7, and the change to
     Section 5.1 shall become null and void or revert back to the original
     Sections prior to this Amendment, as the case may be.

IN WITNESS WHEREOF, the parties hereto have executed this Amendment as of
January 21, 2000.

ADVANCED MICRO DEVICES, INC.    MOTOROLA, INC.

Signature:                      Signature:
          --------------------            --------------------
Name:                           Name:
     -------------------------       -------------------------


CONFIDENTIAL                                                           Page 5

***** Certain information on this page has been omitted and filed separately
with the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.