Search found 2 matches

by olivecc
Mon Aug 12, 2019 1:30 am
Forum: NESemdev
Topic: Help with APU Triangle emulation bug?
Replies: 7
Views: 6629

Re: Help with APU Triangle emulation bug?

Thanks a bunch! I independently came to the same conclusion by reading blargg's apu_ref.txt, which mentions nothing about that flag being set on write to $4008, only $400B; changing it solved the issue. I'm deeply grateful for you going the length of checking your own implementation to check it out ...
by olivecc
Sun Aug 11, 2019 7:35 am
Forum: NESemdev
Topic: Help with APU Triangle emulation bug?
Replies: 7
Views: 6629

Help with APU Triangle emulation bug?

Hello, I'm making progress on writing a NES emulator, and having gotten through CPU/PPU emulation and the NROM mapper (testing with Donkey Kong), am now working on the APU. The pulse channels seem alright, but the triangle channel implementation has a bug that I can't diagnose for the life of me; I ...