DOCUMENT:Q75081 17-DEC-2000 [msdos] TITLE :Cannot Use /U Switch with DOS=LOW and MOUSE.COM Version 8.0 PRODUCT :Microsoft Disk Operating System PROD/VER:MS-DOS:5.x,6.0,6.2,6.21,6.22 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft MS-DOS operating system versions 5.0, 5.0a, 6.0, 6.2, 6.21, 6.22 ------------------------------------------------------------------------------- SUMMARY ======= Microsoft Mouse drivers versions 8.0 and later allow for the use of an XMS driver to load themselves high. The /U switch allows you to load the mouse driver high, but does not work if MS-DOS is loaded into conventional memory. MS-DOS loads into conventional memory with the line DOS=LOW in the CONFIG.SYS file, or the lack of a DOS= line in the CONFIG.SYS file. To work around this feature, type the following command: " setver mouse.com 4.00 " (without the quotation marks) Make sure that SETVER.EXE is being loaded in the CONFIG.SYS file, and then restart the machine. To verify that the mouse driver is loading into XMS, type "MEM /C" (without the quotation marks). The size of the driver in conventional memory should be approximately 3.5K. NOTE: Microsoft does not recommend using the /U switch when DOS=HIGH with Microsoft Mouse Driver, version 8.0. For more information, query on the following words: " conflicts and mouse.com and DOS=HIGH " (without the quotation marks) MORE INFORMATION ================ MOUSE.COM uses an XMS Sub-Allocate call to load itself high. This call requires MS-DOS to be loaded into the HMA before the mouse can load high. MOUSE.COM has a version check built into it that allows it to load into the HMA in MS-DOS versions earlier than 5.0. If the MS-DOS version is earlier than 5.0, MOUSE.COM does not check to see if MS-DOS has been loaded high first. Loading SETVER.EXE allows MOUSE.COM to make the appropriate XMS initialization calls to allow for proper HMA loading. Additional query words: 6.22 5.00 5.00a 6.00 6.20 8.00 ====================================================================== Keywords : Technology : kbMSDOSSearch kbMSDOS621 kbMSDOS622 kbMSDOS620 kbMSDOS600 kbMSDOS500 kbMSDOS500a Version : MS-DOS:5.x,6.0,6.2,6.21,6.22 ============================================================================= 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.