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From: kjh@pollux.usc.edu (Kenneth J. Hendrickson)
Newsgroups: comp.os.minix
Subject: Re: Screen blankers
Message-ID: <27857@usc>
Date: 3 Nov 90 02:08:41 GMT
References: <12681@chaph.usc.edu> <72802@sgi.sgi.com> <73038@sgi.sgi.com>
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Does anybody know how to program the EGA and VGA hardware directly?

I was working on getting Donald Duncan's screen blanker going, and it
doesn't work for EGA.  I studied it, and I see that it should work well
with MDA or CGA (after making a couple of very minor changes so it would
link).

I have a couple of "good" books on the subject, that only show how to do
this using the BIOS.  Of course, the BIOS can't be used in protected
mode.  The hardware must be programmed directly.  Neither the Norton
"Guide to IBM PC and PS/2" nor the Wilton "Programmer's Guide to PC &
PS/2 Video Systems" book show how to program the hardware directly.  :-(
(They do show how to program CGA and MGA hardware directly.)

Of course, if you know how to program the hardware directly, then you
can just fix the screen blanker yourself.  However, I would still like
to have to information, so I can go ahead and do it.

-- 
Ken Hendrickson N8DGN/6       kjh@usc.edu      ...!uunet!usc!pollux!kjh