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MEMO1008.TXT
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1992-12-02
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╔═════════════════════════════════════════════════════════════════════════╗
║ ║
║ ISA Bus: Installing Quarterdeck's QRAM ║
║ ║
╚═════════════════════════════════════════════════════════════════════════╝
QRAM
QRAM is a "memory enhancer" for 8088/8086 or 80286-based computers which
have an EMS 4.0 compatible memory board such as the Above Board ISA, Plus,
or Plus 8. It requires an EMS page frame larger than 4 pages (4 pages =
64Kb). QRAM takes over EMS pages beyond the required 4 pages and converts
them to "high memory". Quarterdeck's LOADHI program can then load device
drivers and memory resident programs into high memory, leaving more
conventional memory free for other programs. You can instruct QRAM to use
the entire page frame if you do not have any applications that require
expanded memory.
Tech Notes:
Quarterdeck's QRAM v2.0 in the IBM PS/2 Model 30 requires the NOXBDA
parameter on the QRAM.SYS device driver line in the CONFIG.SYS file.
NOXBDA stands for No Extended BIOS Data Area. If the NOXBDA parameter is
not present, QRAM will attempt to relocate it resulting in system lockup.
MOVE'EM from Qualitas may have a similar command.
QRAM COMPATIBILITY WITH ABOVE BOARDS
The Above Board Plus and Above Board Plus 8 are completely compatible.
Other installed options, such as VGA boards or network boards, may limit
the number of extra pages in the EMS page frame.
NOTE: The QRAM manual contains an error about the Above
Board upgrade kit. The Above Board Plus does not need to be
upgraded to allow QRAM to function; the Above Board 286 does.
To upgrade an Above Board 286, call (800) 356-3071 and order
the "Above Board Upgrade Kit". The cost of the kit is $99
(US.).
Any Above Boards which have switches, (Above Board PC, PS/PC, AT, PS/AT),
have LIMITED compatibility. Since these boards do not support page frames
larger than 4 pages (64Kb), QRAM must be instructed to use the entire page
frame for high memory. This will prevent other programs from accessing
expanded memory. Some Above Board AT and PS/AT users may find it
acceptable to set the Above Board for 512Kb expanded and the remaining
memory as extended, then have QRAM use the entire page frame as high
memory.
USING QRAM WITH ABOVE BOARDS
REQUIREMENTS:
- Above Board ISA, Plus 8, Above Board Plus, (or an Above Board 286
that's been upgraded to a Plus), or the Matched Memory Classic.
- Above Board installation software diskette dated 6/90 or later.
The expanded memory page frame must be in at least a 64Kb contiguous
block. Additional 16Kb pages may be discontiguous. Intel Above Boards
can map the range C000-EFFF on 8088/8086 based systems, and C000-DFFF on
80286 based systems or better.
ADJUSTING THE EXPANDED MEMORY PAGE FRAME...
By default, the expanded memory manager EMM.SYS will automatically search
the range C000-DFFF and map available 16Kb pages. There are parameters
you can add to the EMM.SYS device driver line in the CONFIG.SYS file that
will allow you to specify exactly which pages EMM.SYS is to map. These
parameters are used to resolve conflicts with other add-in boards having
ROM in the same address space as the expanded memory page frame.
PARAMETERS...
Run the program SOFTSET from the Above Board installation diskette before
adding any additional parameters.
EXPF= (EXPanded First) Sets the starting address for EMM's search for
available pages. Add EXPF=C800 to tell EMM to search the range C800-DFFF
instead of the default search range of C000-DFFF.
EP= (Exclude Page) Allows you to exclude a page, a list of pages, or a
range of pages to prevent EMM.SYS from using them. Add EP=C000,C800 to
exclude those two particular pages. Add EP=C000-CFFF to exclude the
entire range from C000-CFFF.
══════════════════════════════════════════════════════════════════════════════
End of file Intel FaxBack # 1008 December 2,1992