Paul,
Thanks for catching this. I have run into it before, and it is exactly as
you said, an index across a page boundary that screws up my playfield draw.
Billy
> -----Original Message-----
> From: owner-stella@xxxxxxxxxxx [mailto:owner-stella@xxxxxxxxxxx]On
> Behalf Of Paul Slocum
> Sent: Friday, February 08, 2002 2:57 AM
> To: stella@xxxxxxxxxxx
> Subject: Re: [stella] Warring Worms Final Debug
>
>
>
> >I am posting the final debug version of Warring Worms. Please give it a
> >shot. I finally fixed the last glaring bug and added some new features.
> >The bug was the collision detection problem that happened
> occasionally where
> >a missile would miss a head and hit the body of the snake behind it.
>
> I played a bit and I found a bug where some extra lines appear on the
> screen. It doesn't happen very often so it may be a bit tricky to track
> down, but I did manage to get a screen shot of it. I was playing game
> #10. It seems to only happen in the middle of the screen.
>
> One possibility if you're using a symmetrical playfield is that
> your middle
> playfield write is off by one cycle. Looks like you might be doing
> something that sometimes takes a cycle more than expected, like indexing
> across a page boundary. It showed up on both the real Atari via Cuttle
> Cart and PCAEWin.
>
> -Paul
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