NetNews Usenet Archive 1992 #18/NN_1992_18.iso/spool/comp/os/os2/programm/4333

Internet Message Format | 1992-08-19 | 1.7 KB

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From: [e-mail] (Tony Coates)
Subject: OS/2 DVISCR problem (EmTeX)
Message-ID: <[e-mail]>
Keywords: OS/2 DVISCR TeX EmTeX graphics
Sender: [e-mail] (USENET News System)
Organization: Physics Dept. The University of Queensland
Date: Thu, 20 Aug 1992 00:52:19 GMT
Lines: 21

I am running OS/2 v2.0 on a 25MHz 386 with 8M RAM, AMI BIOS, and a
TRIDENT SVGA graphics card with 1M RAM.  I have recently installed
EmTeX, and it all seems to be working except for DVISCR.  It works if I
manually select CGA mode, but if set for automatic graphics-mode
selection, or if set to an EGA or VGA mode, it gives the following error:

2520: **** graphics mode not supported .

OS/2 uses 800x600 SVGA mode as I currently have it set up.  I don't
understand why DVISCR cannot get the card to run in any mode other than
CGA emulation.  Would anyone know if it is due to the virtualisation of
the screen under OS/2?  I read in the documentation that it should be
possible to set explicit parameters for the screen mode, and
unfortunately there are no supplied parameters for the TRIDENT SVGA.
Is it just that I need the correct values for AX and BX for the INT 10
interrupt?  If so, does anyone know what they should be for the TRIDENT
card (my documentation doesn't mention anything on this level).

    Thanks in advance for any help that anyone can give me in this.

                                Tony.