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CHIPSET.DOC
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1990-12-21
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2KB
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60 lines
CHIPSET.EXE is a small program that simply checks to see if your PC
has one of the memory controllers required to use The Last Byte
memory manager.
To see if your PC has one of the supported memory controllers,
simply enter the following command at the DOS prompt:
A>CHIPSET
To see the entire list of what devices are supported, add a question
mark to the command line, as in:
A>CHIPSET ?
If your PC has one of these devices, then The Last Byte (tm) memory
manager will work on your PC, and you will be able to load device
drivers, TSRs, DOS buffers and more into upper memory above 640k.
If your PC uses another kind of chipset, it may not be supported for
one of the following reasons:
(1) No shadow ram hardware:
Examples: VLSI Technologies 82C100 series
Western Digital chipsets
(2) No shadow ram read/write mode; read-only and write-only modes only.
Examples: ACC Microelectronics 2036 and 2121, and all
chipsets from Headland Technologies (previously
known as G2)
(3) Only the CPU (and not DMA) can access the shadow ram. (Several
device drivers and TSRs use disk buffers that DOS accesses via
DMA.)
Examples: VLSI Technologies VL82C286 & VL82C386 TOPCAT
(4) Shadow ram control not based on one enable bit per segment.
Examples: Zymos chipsets
However, some of these chips have hardware support for LIM 4.0 EMS,
and thus many of their motherboards come with a EMS device driver
designed specifically to take advantage of this capability. So in
many cases, you can install this driver first, and then The Last Byte
can use it to manage upper memory.
A free demo version of The Last Byte may be downloaded using the
filename TLB-Vnnn.ZIP, where the "nnn" is replaced by the latest
version number. The demo version is fully functional except that it
limits you to 32k of memory and no more than two device drivers
and/or TSRs loaded into upper memory. If you can't find a copy of
The Last Byte, contact us and we'll be happy to send you a copy.
Key Software Products
440 Ninth Avenue
Menlo Park, CA 94025
(415) 364-9847