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Q78438: Newer Epson Computers Use A20 Handler 1 with HIMEM.SYS

Article: Q78438
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:5.x,6.0,6.2,6.21,6.22
Operating System(s): 
Keyword(s): 
Last Modified: 17-DEC-2000

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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 
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SUMMARY
=======

According to Epson, older Epson computers require various different A20 handlers
(machine switches) with the HIMEM.SYS device driver. More recent Epson computers
use A20 handler number 1.

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

The following computers use the HIMEM.SYS driver with an A20 handler (machine
switch) of one (/M:1):

- Epson Equity 286 Plus

- Epson Equity 386SX Plus

- Epson Equity 386SX/20 Plus

- Epson Equity 386/25 Plus

HIMEM.SYS is loaded through the CONFIG.SYS file as follows:

  device=<drive>:\<dir>\himem.sys

  -or-

  device=<drive>:\<dir>\himem.sys /m:1

where <drive> and <dir> are the drive and directory location of the
HIMEM.SYS file (typically C:\DOS).

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: 6.22 5.00 5.00a 6.00 6.20 3rdparty

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Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS621 kbMSDOS622 kbMSDOS620 kbMSDOS600 kbMSDOS500 kbMSDOS500a
Version           : MS-DOS:5.x,6.0,6.2,6.21,6.22

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