Search found 5 matches

by andsve
Fri Jan 01, 2021 9:40 am
Forum: NESemdev
Topic: Missing score rendering in Donkey Kong
Replies: 1
Views: 2430

Re: Missing score rendering in Donkey Kong

Turns out I'm a huge dumbass. Realising that the only chars missing was zeros it reminded me I had a stupid check in my nametables debug code; if (chr_i > 0) { // ... } Essentially, it didn't render anything that used chr with index 0. Screenshot 2021-01-01 at 17.40.02.png
by andsve
Wed Dec 30, 2020 7:27 pm
Forum: NESemdev
Topic: Missing score rendering in Donkey Kong
Replies: 1
Views: 2430

Missing score rendering in Donkey Kong

Hi all, I'm just started implementing the PPU in my emulator, and for the most part it is going OK. After some initial issues I can actually play the game, even though a lot of stuff is still to do. But there is an issue I just can't wrap my head around, the score and top bar is missing some tiles i...
by andsve
Mon Sep 03, 2018 3:50 pm
Forum: NESemdev
Topic: Understanding nestest STA to $4015
Replies: 4
Views: 10234

Re: Understanding nestest STA to $4015

Makes sense! Thanks man for the help, really been scratching my head at this. :)
by andsve
Mon Sep 03, 2018 3:40 pm
Forum: NESemdev
Topic: Understanding nestest STA to $4015
Replies: 4
Views: 10234

Re: Understanding nestest STA to $4015

Aha! I was thinking along those lines, but it didn't make sense to me since $4015 should be set to 0x00 at init?
by andsve
Mon Sep 03, 2018 3:22 pm
Forum: NESemdev
Topic: Understanding nestest STA to $4015
Replies: 4
Views: 10234

Understanding nestest STA to $4015

Hi all, long time lurker here! :) Been hacking for a while, but now I'm in dire need for some help about something I can't wrap my head around regarding nestest.log. On line 8981 the rom does a STA, where A is 02, to $4015. My emu writes 02 to this address (which should be APU status reg?), but acco...