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- Recently I discovered a little know fact about QEMM. With a little searching
- you can remap RAM into a unused ROM location. On my Everex Step 386/20, this
- results in a gain of 24K. This was very helpful to me due to the fact that I
- must exclude Ram for both a video card and a network card.
-
- There may be some of you hackers out there who would like to write a program
- to locate all unused ROM locations in a computer. I would recommend to just
- upgrade to QEMM 5.0 when it arrives. I have been told by Quarterdeck Tech, that
- 5.0 has a program to evaluate all memory locations and to use them as mappable
- memory.
-
- For now just use DOS DEBUG. All typed commands will be entered in [ ]'s. Don't
- type the [ ]'s just the commands. [ENTER] is used for the return or enter key.
-
- [DEBUG][ENTER]
-
- -[RCS][ENTER]
-
- CS xxxx
-
- :[F000][ENTER]
-
- -[DCS:0000 0FFF][ENTER] ;Numbers will scroll by, watch for numbers
- ;other than 00's. If any occur you can't
- ;remap this section.
- -[DCS:1000 1FFF][ENTER] ;This section in my 386 was blank. There
- ;must be no code in an area to use it for
- ;High RAM.
- -[DCS:2000 2FFF][ENTER] ;Continue this for [DCS:3000 3FFF] Through
- ;[DCS:F000 FFFF] taking note of any blanks.
- -[DCS:XXXX XXXX][ENTER] ;Remember A000 follows 9FFF and so on.
-
- -[Q][ENTER] ;This will return you to a DOS prompt.
-
- Each section is 4K of memory. QEMM doesn't like breaking it down any further
- than 4K. So if there is ANY code in a section don't try to use it!
-
- Next you will need to edit your CONFIG.SYS file. Mine turned out like this:
-
-
- DEVICE=C:\nDV\QM.SYS ROM=C000-C7FF X=D800-DFFF I=B000-B7FF I=C800-D7FF
- I=F100-F5FF I=F700-F7FF RAM HA=256 ROM=F800-FFFF
-
- ROM=C000-C7FF maps my VGA video card ROM to RAM to speed it up.
- X=D800-DFFF excludes my Lantastic Network card ram so it will function.
- I=B000-B7FF remaps memory that would normally be used for a Mo