Memory management utilities
If you use a memory management utility such as EMM386 or QEMM, you
need to configure it so that it runs with your DOS-compatibility hardware and
software.
IMPORTANT
Apple Computer does not recommend using automated memory
configuration utilities with your DOS-compatible Macintosh, because they
can require more memory than management utilities you configure manually.
In addition, some memory configuration utilities may not be compatible with
DOS-compatibility hardware.
If you want to use the EMM386 utility (included as part of DOS) and don’t
require expanded memory, set a “DEVICE=” line in the CONFIG.SYS file to
the following:
DEVICE=C:\DOS\EMM386.EXE NOEMS RAM=D000-EFFF
If you require expanded memory, set a “DEVICE=” line in the CONFIG.SYS
file to the following:
DEVICE=C:\DOS\EMM386.EXE RAM=D000-EFFF FRAME=D000
If you want to use the QEMM utility, use the frame option (ST:F):
DEVICE=C:\QEMM\QEMM386.SYS RAM ST:F ARAM=B080-B7FF
ARAM=C900-DFFF R:1
If you want to use the Stealth mapping option (ST:M), set a “DEVICE=” line
in the CONFIG.SYS file to the following:
DEVICE=C:\QEMM\QEMM386.SYS RAM ST:M X=C800-CFFF X=FC00-
FCFF X=FE00-FFFF ARAM=B080-B7FF ARAM=C900-DFFF R:2
Configure other memory management utilities so that D000 through EFFF is
the only area in the BIOS that can be mapped to upper memory.
To prevent the read-only memory (ROM) BIOS from becoming damaged
when the DOS-compatibility card is configured for 2 MB of memory, set the
switch in the CONFIG.SYS file to turn memory testing off.
DEVICE=C:\DOS\HIMEM.SYS /TESTMEM:OFF
For more information on making the best use of memory, read the sections on
memory management in your DOS manual, or refer to the documentation for
your memory manager if you are using a utility other than EMM386
or QEMM.
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Operating in the PC Environment