Path: utzoo!attcan!uunet!lll-winken!ames!pacbell!cpro!asgard
From: asgard@cpro.uucp (J.R. Stoner)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Load tsr in "resrved" memory (D000:0000 etc)?!
Message-ID: <77@cpro.UUCP>
Date: 25 Feb 89 02:14:59 GMT
References: <15128@princeton.Princeton.EDU>
Organization: COG Gateway, Hayward, CA
Lines: 33

From article <15128@princeton.Princeton.EDU>, by mg@notecnirp.Princeton.EDU (Michael Golan):
> I have a 386 machine with the "neat" chips set. IT seems that the only way
> to use the "reserved" (384K) of memory above the 640K (out of 1M ram) is
> as bios shadow and/or as ram in locations C800:000 to F000:0000 (160K).

Please don't do that.  It has been said to me (the source could be wrong)
that Compaq 386/25 with Flexcache has some kind of interaction with that
region of memory, specifically 0x00d0000.  I can't test this myself as I
do not have a Compaq machine.

I do know that Novell/SMC and CompuPro network adapters use this memory
for packet buffers.  If you want to also get the purported benefits of
IBM SAA they also use this region of memory as the cluster adapter IPC buffer.

> I know that many people have "ram holes" unused in these locations. The only
> use for it I could find in simtel20 is a program called ADJREM which creates
> a ram disk from this memory.

SIMTEL20 is not the universe, you know.  Real programmers working for real
companies are writing code that make use of this memory according to real
published specifications.  In the case of a program making unknown use of
the network buffer memory, if it works more power to you, but be cautious
from now on about attributing bugs to program authors where they more properly
reside with the system integrator.

> Thanks for your time
>  Michael Golan
>  mg@princeton.edu
-- 
"To prevent having to tell fools to RTFM don't let on you WTFM in the first
place." - J.R. (May the Source be With You) Stoner
asgard@cpro.uucp	asgard@wotan.uucp	asgard@well.uucp
...decwrl!pacbell!cpro!asgard