Path: utzoo!utgpu!radio.astro!helios!dooley
From: dooley@helios.toronto.edu (Kevin Dooley)
Newsgroups: comp.sys.amiga
Subject: Re: video problem in interlace
Message-ID: <834@helios.toronto.edu>
Date: 27 Jun 89 13:55:57 GMT
References: <3104@csd4.milw.wisc.edu>
Reply-To: dooley@helios.physics.utoronto.ca (Kevin Dooley)
Organization: University of Toronto Physics/Astronomy/CITA
Lines: 29

In article <3104@csd4.milw.wisc.edu> duncan@csd4.milw.wisc.edu (Shan D Duncan) writes:
>
>Anybody had this problem before?
>
>While in interlace mode the screen "bounces" a few times then the text
>loses its "sharpness".  The display looks like you need to go in and get
>a new prescription for the ol glasses or maybe its time you had some!

I have seen this before and I think I know what caused it.  It
only ever happens (to me) when I am in the initial writing phases
of a program.  I believe that something has stomped a few selected
bytes in the Screen or NewScreen structure causing to be confused
about whether it is in interlaced mode or not.  Note that it is 
just as easy for a piece of sloppy code to stomp the WorkBench's
screen as any other screen.  Usually I reboot as soon as practical
after seeing this because the guru is probably hiding just around
the corner when the next byte gets trashed.  I may be wrong about
this being your problem, but I have never seen it with commercial
programs and it always goes away with mine as soon as I fix whatever 
stupid bug is invariably there. (actually, your bug is probably extremely 
subtle, MINE are stupid :-)  If it were hardware you would expect
it to remain after a warm reboot, but it doesn't.

		Kevin Dooley

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