Search found 3 matches

by kingdiesel
Sun Oct 11, 2020 6:22 pm
Forum: NESemdev
Topic: [SOLVED] Donkey Kong Visual Glitches
Replies: 1
Views: 2406

Re: [SOLVED] Donkey Kong Visual Glitches

Nice -- what was the issue?

I've also found a few bug in my CPU implementation even though NESTest passed.
by kingdiesel
Mon Sep 28, 2020 6:55 pm
Forum: NESemdev
Topic: Bad nametable and memory access in Iceclimber
Replies: 6
Views: 1671

Re: Bad nametable and memory access in Iceclimber

I'm starting to think the two oddities may be related. When I run FCEUX it definitely encounters the same address for BIT : F3C5: 2C A9 58 BIT $58A9 = #$55 This line of code occurs every time we scroll high enough to hit a tile boundary. So given the cpu memory map , we know that this address is in ...
by kingdiesel
Sun Sep 27, 2020 12:59 pm
Forum: NESemdev
Topic: Bad nametable and memory access in Iceclimber
Replies: 6
Views: 1671

Bad nametable and memory access in Iceclimber

Working on getting Ice Climber working and running into two weird issues. First the nametables seems good, but then when they start scrolling there appears to be a weird offset: https://i.imgur.com/CnrFuGN.png I looked over my mirroring code and I think it's correct, and SMB seems to be working well...