Path: utzoo!utgpu!attcan!uunet!ncrlnk!ncrcae!hubcap!gatech!rutgers!iuvax!bkliewer
From: bkliewer@iuvax.cs.indiana.edu (Bradley Dyck Kliewer)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Creating new EGA/VGA modes
Message-ID: <14869@iuvax.cs.indiana.edu>
Date: 10 Nov 88 19:06:10 GMT
References: <8811101454.AA28625@decwrl.dec.com>
Reply-To: bkliewer@iuvax.UUCP (Bradley Dyck Kliewer)
Organization: Indiana University CSCI, Bloomington
Lines: 22

In article <8811101454.AA28625@decwrl.dec.com> desmond@smaug.dec.com (President, LKG Sunset Club) writes:
>I would like to use IBM EGA and VGA cards in modes which are not
>supported by the BIOS.  Specifically, I'd like to be able to set
>them into something on the order of 720 by 400.
>
>Can I do this if I just set appropriate values into the CRT Controller
>registers?
>
>Is there any danger in doing this (i.e. is it possible to destroy

While writing _EGA/VGA A Programmer's Reference Guide_, I was reprogramming
the CRTC registers quite frequently.  The ECD monitor on my primary development
system burned out recently, but I don't know whether it was related (I've seen
comments from several others that this monitor is prone to failure after a 
few years of continuous use).  However, I would be _very_ careful.

Getting all of those registers set to the correct values is pretty tricky,
too -- but you may already realize that.

Bradley Dyck Kliewer                Hacking...
bkliewer@iuvax.cs.indiana.edu       It's not just an adventure
                                    It's my job!