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MORERAM.DOC
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1988-11-20
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title moreram 12-16-83 [12-16-83]
;-------------------------------------------------------------------------------
; MORERAM.COM - by Daniel M. O'Brien (v 1.0) 21 Dec 1983
;
; - freely adapted from a PC-WORLD User-to-User column program
; of the same name (object disassembled using ASMGEN) and from
; a program shown in a DR. DOBBS Journal article
; (Socha's 16 bit Toolkit) called MEMSIZE.
;
; This program has two (or three) purposes.
;
; 1) Allow a PC to use more memory than is allowed via the motherboard
; memory switches (544 K bytes for the 64K motherboard and 640 K bytes
; for the newer 256K motherboard). And because of 1)...
;
; 2) Allow faster power-up sequence by setting the motherboard memory
; switch settings to 64 K bytes installed.
;
; And as long as we are in the neighborhood...
;
; 3) Patch the ROM BIOS data area to indicate that this PC has four
; floppy diskettes installed (instead of the normal two). This is for
; ram disk emulation programs that require the motherboard equipment
; options switch to be set to include the number of ram disks.
; This is most notably required by the AST RESEARCH ramdisk program
; called SUPERDRV. This code is commented out. To use it you must
; uncomment out the code and reassemble. Search for the string:
;
; ;stub***
;
; Using MORERAM.
;
; First, copy MORERAM.COM to your boot device (floppy or fixed).
; Next, create or edit your AUTOEXEC.BAT file found on your
; boot device to include MORERAM as the **FIRST** program that
; will be executed. This is important as results are not guaranteed
; if MORERAM is not the first command executed at boot time.
; Next, open the covers of your PC and set the memory switches
; to indicate that your PC only has 64K.
;
; Now try rebooting your PC using the Alt-Ctrl-Del sequence.
;
; MORERAM will first display a hello banner and the amount of
; memory DOS thinks your PC has (should be 64K). Next, MORERAM
; will pause a second or two while it determines how much memory
; your PC really has. (It also clears this memory in the process
; to eliminate PARITY 2 errors later).
; Once the physical memory limit is determined, MORERAM will display
; that amount and then automatically re-boot. (Don't get excited,
; this won't loop indefinitely, because...) The next time MORERAM
; is again executed from your AUTOEXEC.BAT it will find that the amount
; of memory DOS thinks you have will be the same as that installed, and
; a reboot will be avoided!
;
; I use this program on my PC that has 576K (64K + 512K) worth of memory.
; Also, I have successfully tested it with 704K (64K + 512K + 128K) of memory,
; but this requires placing memory into the semi-forbidden zone (segment A000)
; designated by IBM as "reserved". But that's ok, as long as you don't install
; memory beyond this into the B000 segment where monochrome and graphics display
; memory live!
;
; Questions or comments should be left for me (DAN OBRIEN) on Gene Plantz'
; BBS in Chicago, IL (312-882-4227). I will attempt to fix bugs that may
; crop up, but I make no guarantees. You use this at your own risk (just like
; I do!). If you break something valuable, it's your own fault.
;
;-------------------------------------------------------------------------------
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