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advice on why NES DPCM is making MMC5 irq fluctuate?
http://forums.nesdev.com/viewtopic.php?f=10&t=15140
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Author:  infidelity [ Mon Nov 21, 2016 7:17 am ]
Post subject:  advice on why NES DPCM is making MMC5 irq fluctuate?

When I converted Mario 3 to mmc5, I also converted the original mmc3 irq's to mmc5. On real hardware, there is a very noticeable jump of the irq scanline, everytime a DPCM note is played. The irq will fluctuate/jump about 2 scanlines. I'm not sure if I'm missing something regarding $4010 and my mmc5 irqs. Thanks for reading. :-)

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