Path: utzoo!mnetor!uunet!kddlab!ccut!kcvax!z34
From: z34@kcvax.kyocera.JUNET (Yutaka Matsumoto)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Expanded memory from extended memory?
Message-ID: <234@kcvax.kyocera.JUNET>
Date: 1 Feb 88 06:04:30 GMT
References: <1127@hp-sdd.HP.COM> <251@sun.soe.clarkson.edu>
Organization: KYOCERA Corporation, Tokyo Central Research Lab., JAPAN
Lines: 31
Keywords: device driver EMS extended expanded LIM 4.0

Hello!!
I'm sorry interrupt you.

In article <251@sun.soe.clarkson.edu>, nelson@sun.soe.clarkson.edu (Russ Nelson) writes:
> In article <1127@hp-sdd.HP.COM> hoff@hp-sdd.UUCP (Tom Hoff) writes:
> >...What I need
> >is a device driver to turn 80286 extended memory in to LIM EMS memory.
> 
> No can do, according to some sources.  The LIM EMS spec lets you map one
> memory block to multiple main memory windows.  The emulator(s) work by
> copying from extended memory into read main memory.  I think that you

Does it mean LIM expanded memory area must be read through the LIM window?
and it must be MAPPED the same CPU address space (page frame address) ?

> can see what this copying would do to software that expected to be able
> to modify the SAME block of memory at two addresses.  :-(
> -russ

I am looking for a LIM driver implemented by software emulation.

Is there anyone who made LIM emulation driver for 80286 or 80386 ?
I heard there is a LIM emulator using 80386 protection mode or
exception or virtual mode or another function.

Please let me know such kind of LIM driver.
And please post in net, not by mail.

Thanks,
		Yutaka Matumoto
	z34%.kyocera.junet@uunet.uu.net