Article View: comp.dsp
Article #129Adress of memory beyond 1M on PC
From: Tim Channon
Date: Thu, 23 Jul 1992 00:43
Date: Thu, 23 Jul 1992 00:43
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> > We have a TANG IBM/PC 386 which has 4M of memory. Normally the adress
> >of memory in the PC consists of a segment plus an offset, say, ****:****.
> >1M is the limitation. My question is how can I access the memory beyond 1M?
> >In other words, is there an adress of the memory beyond 1M in the PC?
>
As a slight side issue -- and this is rumour, no doubt unreliable but
interesting just the same.
I have heard reported some strange findings when the MicroSoft SmartDrv disk
cache program is loaded, the version that is supplied with Window 3.1
It appears that this program does things to the processor configuration
registers so that _all_ the processor memory is accessible via the ES
segment.
It was found that segment wrapping did not occur.
----
MicroSoft can supply the XMS specification and demonstration programs on disk
to do with various standard memory accessing schemes. The disk here is
labelled 'XMS Specification and Drivers, Version 2.0'
TC.
E-mail: tchannon@black.demon.co.uk or tchannon@cix.compulink.co.uk
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Newsgroups: comp.dsp From: tchannon@black.demon.co.uk (Tim Channon) Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!demon!black!tchannon Subject: Adress of memory beyond 1M on PC Distribution: world References: <1992Jul22.163525.3983@mpifr-bonn.mpg.de> Organization: null Lines: 24 Date: Thu, 23 Jul 1992 00:43:00 +0000 Message-ID: <711852180snx@black.demon.co.uk> Sender: usenet@gate.demon.co.uk