I've looked at the Y decoder on the 6561 (PAL) chip. It decodes: Y=1 start of vblank Y=10 end of vblank Y=4 start of vsync Y=7 end of vsync Y=311 last line of (even?) frame Y=312 and INT and not INT last line of (odd?) frame so interlace mode does nothing in effect: 311 is enabled on every frame, 312 is never enabled. Would be fun to compare with a 6560 :-) Segher Message was sent through the cbm-hackers mailing listReceived on 2011-08-26 16:00:14
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