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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:

Details:


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