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From: cyang%peruvian.utah.edu@cs.utah.edu (Cheng Yang)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Help needed to set up RAM
Message-ID: <1990Nov16.041239.27258@hellgate.utah.edu>
Date: 16 Nov 90 11:12:38 GMT
Organization: University of Utah CS Dept
Lines: 23

Hi, my 286 system has 2 MB RAM.  And I am running DOS 4.01 on my machine.

I used EMS 4.0 to configure my RAM.  0-640K is the base memory and
I have 2 blocks of 16K video shadow on C0000H and C40000H and also
a 64K shadow on F0000H for BIOS.  After I set DEVICE=EMM400.SYS in my
config.sys.  The system has 64 page (1024K) expanded memory.  However,
I prefer to have 64K memory to be set as extended memory.(to use the
HIMEM.SYS drive provided in DOS 4.01)  I could not find a way to do that.

In order to run HIMEM.SYS, I have to give up the expanded memory.  If I want
to have EMS, I can't run HIMEM.SYS.  Is there a way to reduce the EMS for
4 pages (64K) so that I set it to extended memory?  On the DOS manual, it
said that is possible.  But I could not figure out how to do that.
Or is the manual wrong?

I would be very appreciated if you can give me to find a way to figure that
out.  Especially how to set up the registers in 82c212.


Thanks a million.


Cheng Yang