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From: TLC (all posts)
Date: 1998-05-15
Subject: Re: Interlace bug
Hi!

> Levente:
> I downloaded and checked your interlace routine. Pretty nice. :)
> I've found a bug. The odd and even lines are swapped. You just
> have to swap the values written into $ff12, so write $d8 instead of $d0,
> and $d0 instead of $d8. This bug can be best seen on the red car picture.
> ...

Yep, I was right. It has to be fixed using the scope. The screens looked well on my displays (the 1802 and a Videoton Super Color TV).
Actually, they look worse if I swap the frames. So whether I'd think my routine should be correct (after playing with it again) I can't be sure unless I compare the signal to a valid one.

Or, please tell me if you found a solution.

L8er...

Levente

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