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notaz / picodrive

Fast MegaDrive/MegaCD/32X emulator
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Desynchronized border in Golden Axe 3 #33

Closed vanfanel closed 6 years ago

vanfanel commented 8 years ago

Hi,

This game shows a noticeable error on the tittle screen, where the fast-moving background has a vertical border which seems "unaligned" with the rest of the screen are. It's way easier to see it in movement:

2015-10-25-125456_642x507_scrot

Any idea on what could be causing this? I have been fiddling with cycles per line, etc... but it remains there. CPU emulation and VDP seems to be pretty much spot on, so I doubt that's the case. Chosing the "8bit fast" renderer makes the deffect go away, so... is it something present on real HW that PicoDrive emulates faithfully or a problem with the "16bit accurate" renderer?

notaz commented 6 years ago

Finally fixed in 1.92, was a problem in drawing code.