Michael Chiaramonte shows us once again how to do some NES Programming.

NES Programming #24 – Interrupting the interrupter

Watch this video on YouTube.

Quote:

In this episode I got the MMC3 IRQ working once I realized the I had to re-enable interrupts on the CPU. After that, we saw what happened as you mess with the nametables while scrolling and experimented with one solution to vertical scrolling and scanline counting. I need to some more research to see how other games do this. Thanks for watching and see you next stream!