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Using Scanline IRQs
http://forums.nesdev.com/viewtopic.php?f=10&t=105
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Author:  Link [ Sat Dec 18, 2004 7:16 pm ]
Post subject:  Using Scanline IRQs

I guess some scanline counters trigger IRQs at different time depending on the mapper or something. So if I want to make a certain scanline use a different chr bank how would I do that?

If the scanline counter triggers the IRQ at the beginning of the scanline and then I change the chr bank would that make it so the whole scanline uses that bank? I was reading the PPU timing document and it seems if I did that the first 2 tiles would be from the other bank since the first 2 tiles would be fetched in the end of the last scanline right?

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