Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!uxc!iuvax!rutgers!att!ttrdc!ttrde!pfales
From: pfales@ttrde.UUCP (Peter Fales)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Use extended memory as EMS?
Keywords: EMS, Extended memory
Message-ID: <913@ttrde.UUCP>
Date: 27 Mar 89 15:29:17 GMT
References: <477@studsys.mu.edu> <9403@polyslo.CalPoly.EDU>
Distribution: usa
Organization: AT&T, Skokie, IL
Lines: 28

In article <9403@polyslo.CalPoly.EDU>, ddurbin@polyslo.CalPoly.EDU (Daniel A. Durbin) writes:
> The following was extracted from EMSIM.DOC:
> 
> The  EMSimulator  or Expanded Memory Simulator,  bridges the  gap 
> between   your  application  software  and  the  AT's  previously 
> unusable  Extended  memory.  Now programs such as Lotus  123  v2, 
> Symphony v1.1,  Lightning,  Reflex v1.1,  and most L-I-M Expanded 
> Memory  compatible software can access up to 8 megabytes of  your 
> AT's   extra  memory.   By  removing  the  640K  restriction  and 
> limitations of conventional memory,  expanded memory makes  large 
> spreadsheets and databases a reality.

So how do they do this??  I have a theory, but it sounds like the
cure is worse than the disease.  I think they steal 64K (out of your
640) and use the INT 15 extended memory block copy to copy data in and
out of that 64K block.  I would like to find out that there is a better way!

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Peter Fales			AT&T, Room 2F-217
				200 Park Plaza
UUCP:	...att!ttrde!pfales	Naperville, IL 60566
Domain: pfales@ttrde.att.com	work:	(312) 416-5357