Xref: utzoo comp.windows.ms:648 comp.sys.ibm.pc:30069
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!att!chinet!patrickd
From: patrickd@chinet.chi.il.us (Patrick Deupree)
Newsgroups: comp.windows.ms,comp.sys.ibm.pc
Subject: Re: Expanded / Extended Memory
Message-ID: <8685@chinet.chi.il.us>
Date: 12 Jun 89 15:17:32 GMT
References: <11884@netnews.upenn.edu>
Reply-To: patrickd@chinet.chi.il.us (Patrick Deupree)
Followup-To: comp.windows.ms
Distribution: usa
Organization: The Whitewater Group
Lines: 32

In article <11884@netnews.upenn.edu> harnyo@grad1.cis.upenn.edu () writes:
>
>	o Which type of memory should I configure for best performance ?
>	  (Exp vs. Ext) ? I can have both of them.
To swap processes in Windows you should use expanded memory.  Extended just
buys you 64K (Windows uses it for something that I havn't figured out yet).

>	o In running WIndows 286, how do I make use of the extra memory
>          to open more applications instead of converting all to cache
>	  memory (using Smartdrive.sys). I read from the documentation
>	  that it supports only LIM 4.0 ?
This is where life gets tricky.  You basically need large frame EMS to do this.
So, depending on what kind of memory you have in your system, you may or may
not be able to do this.  You didn't mention what kind of memory card you have
in your system, so I have no clue if it's large frame or not.  However, I can
tell you that the AST Rampage and the Intel Above Board + are large frame EMS.
Then comes backfilling.  To get the best results for process swapping you should
backfill your computer from 256K on.  This basically means that you tell your
computer that you have 256K on the motherboard (this needs to be set via
hardware switches) and then tell the expanded memory board to start at 256K
on the motherboard.
>	o Will my above configuration be sufficient to run OS/2 with
>	  presentation manager ? What about Unix ?
The configuration that works best for Windows won't work for OS/2.  In their
infinitly grand way of doing things, Windows uses expanded memory, OS2 uses
extended memory.  I'm not sure why Microsoft (or IBM?) did this, but that's
how it is.  I believe that Unix uses extended memory also.
-- 
"I place my faith in fools.  Self confidence, my friends call it."
					-Edgar Allen Poe

Patrick Deupree -> patrickd@chinet.chi.il.us