HIMEM.SYS - /machine:xxxx Startup Options

DocumentID: 643077
Revision Date: 29-Feb-96 8:18:49 PM

The information in this document applies to:
WordPerfect® 5.1 for DOS

Problem

Solutions: The /machine:xxxx startup option specifies the A20 handler to be used. An A20 handler is a part of your computer that gives it access to the high memory area. The xxxx value can be any of the following codes or their equivalent numbers: Code Number A20 Handler at 1 IBM PC/AT ps2 2 IBM PS/2 pt1cascade 3 Phoenix Cascade BIOS hpvectra 4 HP Vectra (A and A+) att6300plus 5 AT&T 6300 Plus acer1100 6 Acer 1100 toshiba 7 Toshiba 1600 and 1200XE wyse 8 Wyse 12.5 MHz286 Tulip 9 Tulip SX Zenith 10 Zenith ZBIOS at1 11 IBM PC/AT at2 12 IBM PC/AT (alternative display) css 12 CSS Labs at3 13 IBM PC/AT (alternative delay) philips 13 Philips fasthp 14 HP Vectra Typically, HIMEM.SYS detects which A20 handler is being used. You might have to specify a value for this setting if the A20 handler reports problems using MS-DOS in the high memory area. If the machine you are using is not listed, see the REAM+DME.TXT on-line file for additional values. The default value for the /machine:xxxx switch is at or 1. /a20control:on/off Specifies whether HIMEM.SYS is to take control of the A20 line even if A20 was on when HIMEM.SYS was loaded. The default setting is /a20control:on.

Answer:

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