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From: pilgrim@daimi.aau.dk (Jakob G}rdsted)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: I got problem with overscan*interlace*PAL
Message-ID: <1991Jun4.175631.20446@daimi.aau.dk>
Date: 4 Jun 91 17:56:31 GMT
References: <1991Jun2.183144.22881@daimi.aau.dk> <1991Jun3.135118.944@csc.canterbury.ac.nz>
Sender: pilgrim@daimi.aau.dk (Jakob G}rdsted)
Organization: DAIMI: Computer Science Department, Aarhus University, Denmark
Lines: 35

chem194@csc.canterbury.ac.nz (John Davis) writes:
>In article <1991Jun2.183144.22881@daimi.aau.dk>, pilgrim@daimi.aau.dk (Jakob G}rdsted) writes:
>> I use a PAL a500. Both of these programs fail on one type
>> of pictures. That is, interlaced, 4colour overscan pictures.
>> It seems like, when one tries this, that the machine acts like
>> the display is NTSC.
>If you mean that the display actually _truncates_ around the 400 line
>mark on the screen (i.e. ALL windows disappear beneath there, as opposed to 

Yes, this is what happens. The screen goes "NTSC", but the contents of
the screen stays what they should be. It looks like someone put tape
across the bottom of the display, so one cannot see what is going on down
there.

>the screen still visible) then it could be the reasonably well known
>bug relating to overscaned, 16 colour hires PAL screens. To find out,
>while the screen is truncated, load preferences and use the centering

I'll try this in a few hours from now.

>The solution is to leave your preferences set with the screen far enough
>to the left that the chop-off doesn't happen... 

And that is the only solution? And whose "fault" is it, i.e. is it
a hardware or software bug, is it OS dependant(= fixed in 2.0) ? or
what? I'm glad to hear it was not me going mad, it has driven me
crazy( :-) for the last 2 years.



--
From the notorious
                      Jakob Gaardsted, Computer Science Department
Bed og arbejd !            University of Aarhus,  Jylland (!)
(Pray and work!)  AMIGA!  pilgrim@daimi.aau.dk | I'd rather play Moria.