Article View: comp.os.msdos.programmer
Article #5125Re: Dual Monitor Switching
From: Roger Fulton
Date: Mon, 11 Mar 1991 23:04
Date: Mon, 11 Mar 1991 23:04
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In article <1991Mar11.172914.4450@engin.umich.edu> pong@caen.engin.umich.edu (Bryan John Jalowitz) writes:
>
>Hi,
>I would like to know how, from within an application, I can switch
>monitors in a dual configuration. I would like something similar to
>"mode mono" vs. "mode co80", but that does not clear the display.
>
>More specifically, I am using a VGA/HERC dual monitor configuration,
>and I would like to be able to route text/graphics to one or the other
>display systems. I know about setting the mode with int 10h func 0,
>but there appears to be more to it than that. That doesn't "switch" the
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>video bios' notion of the current display.
Yes, there is. In addition to setting the video mode,
you need to also update the equipment flag at 0040:0010
appropriately: xx10xxxx for color, xx11xxxx for mono
(where 'x' means leave it alone). Also, you should account
for the fact that color systems have a different maximum
cursor line count than mono systems (so you should save and
restore the cursor when changing video modes).
.
--
Roger Fulton
roger@wrq.com
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Path: arc1-ca.pugleaf.net!utzoo!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!spool.mu.edu!uwm.edu!ogicse!milton!roger From: roger@wrq.com (Roger Fulton) Newsgroups: comp.os.msdos.programmer Subject: Re: Dual Monitor Switching Message-ID: <18203@milton.u.washington.edu> Date: 11 Mar 91 23:04:13 GMT References: <1991Mar11.172914.4450@engin.umich.edu> Sender: news@milton.u.washington.edu Organization: Walker Richer & Quinn, Inc., Seattle, WA Lines: 31