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From: davidsen@steinmetz.UUCP (Davidsen)
Newsgroups: net.micro.pc
Subject: Re: CGA vs EGA
Message-ID: <950@kbsvax.steinmetz.UUCP>
Date: Fri, 17-Oct-86 14:53:56 EDT
Article-I.D.: kbsvax.950
Posted: Fri Oct 17 14:53:56 1986
Date-Received: Wed, 22-Oct-86 22:24:57 EDT
References: <689@galbp.UUCP>
Reply-To: davidsen@kbsvax.UUCP (Davidsen)
Distribution: net
Organization: General Electric CRD, Schenectady, NY
Lines: 30

In article <689@galbp.UUCP> bing@galbp.UUCP (Bing Bang) writes:
>In article <> uchuck@ecsvax.UUCP (Charles Bennett) writes:
>>
>>We are currently getting ready to purchase new IBM PC/AT's for the
>>programming staff here.  We utilize the machines in a variety of ways
... most of which I deleted ...
>>                The question is this; what, if any, are
>>the incompatablities between the CGA board and the EGA board (with
>>appropriate monitor, of course).  Rumor postulates two completely
>>different circumstances; 1) CGA software does not run on the EGA, and
>>2) CGA software runs on the EGA but in CGA mode without special
>>intervention.  ????WHAT IS THE STORY????  !!!!PLEASE!!!!

There are two "CGA modes" on the IBM EGA and most compatibles. One is
selected by the hardware switches and is close to CGA. The other is
selected by a software program (I posted it to net.sources a few months
ago) which seems to get complete compatibility. I have yet to find a
problem with the IBM board, the Quadram, or the Video7 board. This
includes some *very* badly programs. Any hardware/software which
switches "automagically" will sooner or later do the wrong thing.
-- 
	-bill davidsen

	seismo!rochester!steinmetz!--\
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"Stupidity, like virtue, is its own reward"