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From: weisen@eniac.seas.upenn.edu (Neil Weisenfeld)
Newsgroups: comp.sys.ibm.pc
Subject: Re: what display combinations can coexist in a PC?
Message-ID: <23258@netnews.upenn.edu>
Date: 13 Apr 90 16:58:15 GMT
References: <28045@ut-emx.UUCP> <3871.26250e21@vax5.cit.cornell.edu>
Sender: news@netnews.upenn.edu
Reply-To: weisen@eniac.seas.upenn.edu.UUCP (Neil Weisenfeld)
Distribution: comp
Organization: University of Pennsylvania
Lines: 37

In article <3871.26250e21@vax5.cit.cornell.edu> hd7x@vax5.cit.cornell.edu writes:
>In article <28045@ut-emx.UUCP>, keshava@walt.cc.utexas.edu (Sanjay Keshava) 
>writes:
>> Does anyone have a summary on which combinations of display adapters
>> can coexist in a PC?  In particular, I would like 2 VGA cards
>> displaying different screens, eventually one will be upgraded to a
>> TIGA board.  Simultaneous display would be great, but I can live with
>> a soft-switch to toggle between displays.  Suggestions of other
>> combinations (eg CGA-VGA, Mono-VGA, Herc-EGA, etc) are also welcome.
>
	[ stuff deleted ... ]
>
>But, there is one exception to this rule that will allow your dream of two VGA
>displays.  On an IBM PS/2, you CAN have the internal VGA coexist with an IBM
>8514/A adapter and monitor.  For this to work, one of the displays has to be
>using one of the 8514/A's advanced modes (1024x768) while the other displays
>standard VGA (640x480).
>
>-Sanjay Aiyagari (HD7X@vax5.cit.cornell.edu)


I wasn't the programmer who  worked on the project, but...

I believe that the 8514/A will drive two monitors -- one in text and one in graphics (both
color)

Neil

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