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That's good to know. BGB is doing the looping FF in 0x38. I implemented those reads as 0. Since my sound emulation is still WIP, I wasn't even turning off channel 1 when the length hit 0, so that worked haha, I still added the code to reset the sound timers when FF04 is written to. Now the game boot...

Ok awesome, I managed to fix my emu, and now it can pass 6 more of your diabolic tests. I'm still failing most of the "gpu" ones, which are cumbersome. However, how about this timer related one ? https://github.com/Gekkio/mooneye-gb/blob/master/tests/acceptance/timer/rapid_toggle.s Do you ...

Wow, really ? I've been using BGB logic to lock everything, I will analyze it a little and fix it. I wonder how the anti emulator protection works for "airaki" with this logic, since it's supposed to do a DMA and then jump to bank 0. this changes everything. Thanks for your time, and your ...

Yeah, I know .. I'm not reading them all at once, I have it separated it like that, and it passes blarggs instructions timings tests. This is what Im doing: execute OAM ... eventually, I reach pc = 0xFDFF: read memory: 0xE9 advance clocks read memory: 0x42 (this is wrong, I should get 0xFF in here) ...

Hi all, I've been trying to iron out some of the many bugs that my emulator still has. Fortunately, each day I manage to fix most of them, and today I think my compatibility ratio for commercial games is near 100%. I've been trying to fix edge case scenarios, so for starters, this test: https://gith...

Well, I'm getting closer. Still it sounds like sh*t Comparing it to the real sound, my frequencies sound really low. According to this: http://bgb.bircd.org/pandocs.htm#vramspriteattributetableoam Frequency = 131072/(2048-x) Hz So for my first note in the bios, x is 0x783. Frequency using that formu...

Ok, that's super helpful I managed to get the 2 notes playing and the second one gets the volume lowered until muted. I created a square generator sound, but the notes are super long, and they are blocking the emulator, so new questions now: 1) I'm creating a buffer, but I really don't know which si...

Well, I'm still super confused about sound, Here's my findings on the DMG bios rom (using BGB). FF26 set to 80 (internal value now is F0). This is turning on the sound (in your previous post, you said putting 1 to bit 7 destroyed the sounds registers, but I think it's the other way around, right ?) ...

Wow, thanks for your awesome answer !

I will read it many times, trying to get everything. And I will try that sound rom too.

Time to analyze and code, Thanks !! =D

Hi again, I need once more the help from you masters of emulation. I managed to nail GBC, I couldn't find any visual bugs with Aladdin, Tomb Raider, Rayman and some others. So I decided it was time to add the only major feature I was missing from my emulator (and cable link, that's still pending). I...

Brilliant ! I managed to make the CGB bios to work perfectly. Time to move to those new DMA features.

Thanks !

Hi, I've been trying to add color support to my GB emulator. DMG compatibility is very high now (some window issues mostly), but I'm having a hard time with color GB. I already emulated the palette registers for bg and obj, but I can't draw anything yet. This document for example (http://gbdev.gg8.s...

I want to know if the interrupt sequence timings is correct, as seen on my last post.

Thanks !

Anyone ?

So this is what Im doing with interruptions: if IME is ON: Turn off IME 4 cycles 4 cycles Reset bit on memory 0xFF0F of current interrupt. Write upper byte of pc to stack 4 cycles Write lower byte of pc to stack 4 cycles Change pc to interrupt vector 4 cycles reset halted state to non halted. if IME...