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Atari coding BBS
| Re: Timer-B at several lines? |
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Posted by: Leonard
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Jun,25.2015-16:39
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Btw reading your thread, I came with an idea. Not sure it works but you can try. As the count register is only fetched when timer fire or timer is explicitly restarted using $fa1b, maybe you could try this:
vbl:
addq.w #1,vblcount
move.w #$000,$fffff8240.w
clr.b $fffffa1b.w
move.b #32,$fffffa21.w
move.b #8,$fffffa1b.w ; run timer, line count=32
move.b #16,$fffffa21.w ; immediatly after set count to 16. Theorically you should still has 32 black lines, then 16 red lines.
Tell me if it works :)
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