Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!oakhill!val!ben
From: ben@val.com (Ben Thornton)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Computer slow since installation of SCSI drive
Message-ID: <1990Dec14.023306.2966@val.com>
Date: 14 Dec 90 02:33:06 GMT
References: <1990Dec9.050509.1470@vax5.cit.cornell.edu> <1990Dec9.195558.16216@bigsur.uucp> <4477@altos86.Altos.COM> <1990Dec11.030412.6655@amd.com>
Distribution: comp
Organization: Video Associates Labs
Lines: 22

phil@brahms.amd.com (Phil Ngai) writes:

>In article <4477@altos86.Altos.COM> rcollins@altos86.UUCP (Robert Collins) writes:
>|In article <1990Dec9.195558.16216@bigsur.uucp> mussar@bcars53.uucp (G. Mussar) writes:
>|>You can't shadow the video RAM only the video ROM. (What good would it do for
>|
>|Wrong!
>|
>|There are numerouse chipsets that allow you to shadow video RAM (A0000-BFFFF).

>BUT WHAT'S THE POINT?

The point is that most SUPER VGA's use this technique to extend the display
memory size to accomodate the hi-res modes without expanding the address
space seen by the CPU.  End of Discussion.

Ben
-- 
Ben Thornton             packet:  WD5HLS @ KB5PM
Video Associates       Internet:  ben@val.com
Austin, TX                 uucp:  ...!cs.utexas.edu!val!ben
Did Schrodinger exist? ...or was that in another universe?