DOCUMENT:Q103557 17-DEC-2000 [msdos] TITLE :HIMEM.SYS Fails to See More than 64 MB on EISA Machine PRODUCT :Microsoft Disk Operating System PROD/VER:MS-DOS:4.01,5.x,6.0,6.2,6.21; WINDOWS:3.1,3.11 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft MS-DOS operating system versions 4.01, 5.0, 5.0a, 6.0, 6.2, 6.21 - Microsoft Windows versions 3.1, 3.11 - Microsoft Windows for Workgroups version 3.1 ------------------------------------------------------------------------------- SYMPTOMS ======== Versions of HIMEM.SYS earlier than 3.10 may not recognize more than 64 megabytes (MB) of memory on EISA bus computers. CAUSE ===== This is because HIMEM.SYS does not recognize EISA memory blocks that start between 64 MB and 65 MB. On these machines, HIMEM.SYS only sees 64 MB of memory. NOTE: MS-DOS 6.2 and Windows for Workgroups version 3.11 provide HIMEM.SYS version 3.10. Additional query words: 6.0 5.0 5.00 5.00a 3.1 ====================================================================== Keywords : Technology : kbAudDeveloper kbWin3xSearch kbWFWSearch kbZNotKeyword3 kbWin310 kbWin311 kbWFW310 kbMSDOSSearch kbMSDOS621 kbMSDOS620 kbMSDOS600 kbMSDOS500 kbMSDOS401 kbMSDOS500a Version : MS-DOS:4.01,5.x,6.0,6.2,6.21; WINDOWS:3.1,3.11 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2000.