Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!apple!snorkelwacker.mit.edu!hsdndev!husc6!encore!pinocchio!schwalbe
From: schwalbe@pinocchio.Encore.COM (Jim Schwalbe)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: 386sx, set high-memory to extended or expanded memory?
Message-ID: <13724@encore.Encore.COM>
Date: 4 Jan 91 17:36:42 GMT
References: <1991Jan2.091603.24584@d.cs.okstate.edu>
Sender: news@Encore.COM
Reply-To: schwalbe@pinocchio.UUCP (Jim Schwalbe)
Organization: Encore Computer Corp, Marlboro, MA
Lines: 31

In article <1991Jan2.091603.24584@d.cs.okstate.edu> ong@d.cs.okstate.edu 
(ONG ENG TENG) writes:
>I just got a 386SX with NEAT chips.  The NEAT chips allow me to
>set the memory greater than 1 meg to expanded memory (EMS 4.0). 
>I have 4 meg.  Should I set the motherboard memory to
>expanded or should I set it to extended then use QEMM.SYS to
>make it work like expanded memory (I have QEMM)?  Which is
>faster?  I should think it does not matter that much.  Anybody
>has any experience?
>

I'll tell you what I did and it works just fine.  Set the bit in the XCMOS
setup to disable expanded memory.  When you install QEMM.SYS in your CONFIG.SYS
file, it will automatically allocate your >1Meg memory to either expanded or
extended depending on what the programs that are running need.  I've run all
kinds of programs that use expanded and extended memory and haven't had any
problems yet.  The only negative effect I've noticed so far from QEMM is that
it slow the hard drive data transfer rate down from about 800 K-bytes/sec to
just over 500 K-bytes/sec :-(  Someone on the net here warned about that and
it is true, I noticed it right away.  I've decided to live with it for the 
benefits of QEMM.  BTW, QEMM takes up less memory below 640K than other
expanded memory managers alone (including Windows expanded memory manager) and
it acts like a expanded and extended memory manager.

.---------------------------------------------------------------------------.
: Jim Schwalbe               .----------------. "Half of what I say is      : 
: Hardware Research Group .--+-------------.  |  meaningless; but I say it  :
: Encore Computer Corp.   |  | E N C O R E |  |  so that the other half may :
: Mail:                   |  `-------------+--'  reach you."                :
:  schwalbe@encore.com    `----------------'             - Kahil Gibran     :
`---------------------------------------------------------------------------'