NetNews Usenet Archive 1993 #1/NN_1993_1.iso/spool/comp/lang/pascal/8027

Internet Message Format | 1993-01-11 | 1.8 KB

Xref: sparky comp.lang.pascal:8027 comp.os.msdos.misc:6957 comp.sys.ibm.pc.misc:16525
Newsgroups: comp.lang.pascal,comp.os.msdos.misc,comp.sys.ibm.pc.misc
Path: sparky!uunet!mcsun!sun4nl!fwi.uva.nl!wijkstra
From: [e-mail] (Marcel Wijkstra (AIO))
Subject: Switch video mode in Turbo Pascal (5.5, 8514)
Message-ID: <[e-mail]>
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Organization: FWI, University of Amsterdam
Date: Mon, 11 Jan 1993 09:07:44 GMT
Lines: 27

Hi,

We use Turbo Pascal 5.5 on a PS/2 with a 8514 for a Computer Graphics course.
My suprevisor wrote a set of graphics procedures, that supports both standard
VGA as well as 8514. In VGA mode, we have no problems at all.
However, when we use the 8514 mode, there is a problem with switching back to
text mode when an error occurs (proghram termination), or when using the IDE
for debugging. In both cases, the 8514 screen stays on top, and the text
screen remains invisible.
When the program terminates normally, the text screen does appear.

Is there some solution to this problem?
I've heard you can control the video mode switching for debugging with the
specification of one monitor for the IDE, and one for program output, but
I cannot find anything about it in the manual. How can this be done?
Is there a simple way of writing a TSR that takes over control of the
video mode switching (I never wrote a TSR before...)?
Or can it be done by programming the 8514 differently (I did not write the
grapphics procedures, but I do have access to its source code)?

Thanks in advance,
Marcel.
--
 X       Marcel Wijkstra   AIO   ([e-mail])
|X|         Faculty of Mathematics and Computer Science
 X           University of Amsterdam   The Netherlands
======Life stinks. Fortunately, I've got a cold.========