SpritesMind.Net

After some investigation, I figured the problem came from Timer B counter not being loaded properly, in my case because I was doing this to detect Timer B LOAD bit changes (FM register 0x27):

if ((v&2) & !(ym2612.OPN.ST.mode&2))
ym2612.OPN.ST.TBC = ym2612.OPN.ST.TBL;
I'm surprised your compiler ...

BTW, I play with your NTSC filter on my RPTV at all times. Would you consider a comparison between raw emulator output color counts, the NTSC filter's, and Composite useful in any way?
Maybe for the NES one. The SNES one reduces to 13-bit RGB before filtering. The Genesis one isn't very accurate ...

One thing is that the Genesis pixel rate is slightly less than twice the color carrier frequency, so the color fringes do a rainbow as you go horizontally across the screen. For example, a simple black and white alternative vertical pattern will generate a rainbow. On the other hand, the SNES pixel ...

Well, shouldn't we just apply a limit like it was done in the original core ? By doing this, you are reducing FM output level (relative to PSG)... I think it's not very common that all channels are set to max, hence why a limiter was used but I wonder which solution is best.

It's definitely rare ...

yeah, it seems I can't download them :wink:
OK, try this mirror: genesis_recordings.zip

Yeah. I just modified the channel muting mask from ~0 to ~((1 << 7) - 1). This preserves the sign bit. This was in the MAME version, where it applies this mask to each channel, sums them, divides by 2, then ...

Here are some recordings (sorry for mp3, as I lack FLAC or anything modern): genesis_recordings.zip (2.6 MB; let me know if you have problems, as this host sucks)

These are from the original Sega Genesis model, not a later one where sound is really crappy (on those, getting rings in Sonic for ...

I was doing some testing today on a YM2612 emulator of the number of bits in the DAC. I believe it's a 7- or 8-bit DAC, that's time-division multiplexed (as the YM2612 Wikipedia page says). This means that the DAC really operates at 6 times the normal rate, or 1/24 the clock input. So for the Sega ...