Article View: comp.sys.ibm.pc
Article #40274Re: USING TWO GRAPHICS CARDS IN A COMPAQ 386/25
From: Vidiot
Date: Sat, 23 Dec 1989 17:56
Date: Sat, 23 Dec 1989 17:56
24 lines
1741 bytes
1741 bytes
In article <5209@arctic.nprdc.arpa> trejo@nprdc.arpa (Leonard J. Trejo) writes:
<
<We're trying to use two graphics cards in a Compaq 386/25 computer
<running MS-DOS 3.1. One card is the Compaq Video Graphics Controller
<(VGA-compatible) and the other is the Compaq Video Display Controller
<(CGA-compatible). We'd like to use, simultaneously, the VGA for
<graphics-only display purposes only and the CGA as a text-only
<console which echoes keyboard input. Problem is that despite our
<best efforts, graphics always go to the CGA card. I'm told that
<this is because VGA and CGA screen memory overlap, plus that
<whenever another graphics card is installed with the Compaq VGA,
<graphics are forced to go to the other card and the VGA runs in
<monochrome mode.
You have been told correctly. You can only run a monochrome and a color card
in the same system. Both the VGA and CGA use the same memory mapped space and
control registers (CGA is a sub-set of VGA cards).
You are SOL.
--
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!samsung!zaphod.mps.ohio-state.edu!uwm.edu!uwvax!astroatc!vidiot!brown From: brown@vidiot.UUCP (Vidiot) Newsgroups: comp.sys.ibm.pc Subject: Re: USING TWO GRAPHICS CARDS IN A COMPAQ 386/25 Keywords: VGA CGA COMPAQ 386 GRAPHICS Message-ID: <354@vidiot.UUCP> Date: 23 Dec 89 17:56:52 GMT References: <5209@arctic.nprdc.arpa> Reply-To: brown@vidiot.UUCP (Vidiot) Distribution: na Organization: Vidiot's Hangout Lines: 24