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Q57809: SYSTEM.INI Entry Required for Zenith 386

Article: Q57809
Product(s): Microsoft Windows 95.x Retail Product
Version(s): WINDOWS:3.0,3.0a,3.1,3.11
Operating System(s): 
Keyword(s): 
Last Modified: 17-NOV-1999

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The information in this article applies to:

- Microsoft Windows versions 3.0, 3.0a, 3.1, 3.11 
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SUMMARY
=======

For proper operation under Microsoft Windows in 386 enhanced mode, the Zenith
386 requires the following entry in the [386Enh] section of the SYSTEM.INI
file:

  EMMExclude=E000-EFFF

MORE INFORMATION
================

The reason this is needed is because the Zenith 386 computers have ROM at these
segment addresses which does not have proper ROM signatures. Enhanced mode
normally automatically excludes regions of the machine address space that are
occupied by ROM, but this requires that the ROM be correctly marked as ROM.
Zenith used IBM's PS/2 ROM design (PS/2s also have improperly marked ROM at
E000-EFFF), but Zenith machines are not PS/2 MCA machines, they are ISA
machines. This region is properly excluded on PS/2 MCA machines through
MCA-specific code, but not on the Zenith machines since they are ISA machines.

The products included here are manufactured by vendors independent of Microsoft;
we make no warranty, implied or otherwise, regarding these products' performance
or reliability.

Additional query words: 3.00 win30 3.00a KBHW 3rdparty 3.10 3.11 win31

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Keywords          :  
Technology        : kbWin3xSearch kbZNotKeyword3 kbWin300 kbWin300a kbWin310 kbWin311
Version           : WINDOWS:3.0,3.0a,3.1,3.11

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