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Old 26 December 2012, 17:34   #8
mark_k
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Yes I think that's pretty much it. The half-rate VSYNC pulses would be to make the Amiga output long/short fields corresponding to long/short genlock video fields. (I wonder whether the VPOSW LOF bit has any effect in that case?)

As for the half-rate HSYNC pulses (CIA-B TICK)... perhaps that's to do with the NTSC long/short lines thing???
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