How to change video modes??

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2 total messages Started by Jeff Meyers Thu, 07 Jan 1993 08:40

#7492

Author: Jeff Meyers
Date: Thu, 07 Jan 1993 08:40

24 lines
1384 bytes

OK, here's the situation: I have two monitor (VGA and mono) and want to write
a TSR that will display text on the mono monitor without disturbing the
VGA screen.

I have tried using BIOS interrupt 10, function 00 (set video mode).  This will
work when changing modes to anything but 7 - the one I need.  It switches to
mode 0 when I try this.

I need to be able to do three things: clear the mono screen, write text to
it, and scroll up one line.  As usual, I would like the easiest and most
efficient method - other than writing directly to video memory.

Any suggestions?  Do I need to do something else to change video modes with
the above listed BIOS call?

Please e-mail me...

Thanks!

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| Jeff Meyers      |  jmeyers@ecst.csuchico.edu      | 39x43'N  121x48'W   |
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Re: How to change video modes??

#7521

Author: Jeff Kenton
Date: Fri, 08 Jan 1993 02:41

21 lines
1212 bytes

jmeyers@ecst.csuchico.edu (Jeff Meyers) writes:

>OK, here's the situation: I have two monitor (VGA and mono) and want to write
>a TSR that will display text on the mono monitor without disturbing the
>VGA screen.

>I need to be able to do three things: clear the mono screen, write text to
>it, and scroll up one line.  As usual, I would like the easiest and most
>efficient method - other than writing directly to video memory.

>Any suggestions?  Do I need to do something else to change video modes with
>the above listed BIOS call?

Do the VGA stuff the normal way, and write directly to video memory for mono.


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=			Jeff Kenton	(617) 894-4508			=
=			    jkenton@world.std.com			=
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