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M1 driver requests by unknownfile at 5:57 PM EDT on July 27, 2008
Hi, I'm sort of bored, so you can now annoy me about M1. If you want me to work on a driver to submit, you can do so now.
by Knurek at 6:28 PM EDT on July 27, 2008
Well, I'd love to see a Psikyo SH2 one (psikyosh.c and psikyo4.c), but RB told once those don't have a separate sound CPU, so would
require hacking the bejeebus out of the games.

suprnova.c and ssv.c would be fine too look at as well (mostly for Vasara 1/2 and Cyvern). IIRC RB had done some work on one of those ages ago (song select codes or such).

deco_mlc.c games look interesting as well if Hoops '96 is anything like the NeoGeo game.
by unknownfile at 8:18 PM EDT on July 27, 2008
OH SWEET JESUS IT'S A SH-2 CPU

I haven't worked with SuperH assembly code before, so it looks like I'm in for a bit of a challenge.

OFF TO SPACE BOMBER I GO

----

OOPS EXCUSE ME, THE MAME DEBUGGER SUCKS:

-----------------------------------------------------
Exception at EIP=009A3326: ACCESS VIOLATION
While attempting to read memory at 001AA6E0
-----------------------------------------------------
EAX=00000000 EBX=00000001 ECX=10321000 EDX=001AA6E0
ESI=02850994 EDI=021AA6E0 EBP=02CDEBCC ESP=02CDEBA4

edited 8:27 PM EDT July 27, 2008
by unknownfile at 7:01 PM EDT on July 29, 2008
Well, I've put this off long enough.

Time to get working on Genesis music hacking again. I'm doing it for M1 this time around, and I have a single game working right now. Impressive!

Too bad the PCM is all corrupted and suck.
by DChronos at 5:43 PM EDT on July 30, 2008
How about fixing the one for Gunlock/Rayforce?
by marcusss at 9:04 PM EDT on July 30, 2008
Yeah the music from the vasara games is cool and wish it could be done.. I believe it can't be done currently :( awww.. That would be really nice of you :D
by Arbee at 3:17 PM EDT on July 31, 2008
I was just sent a possible fix for the missing drums in Gunlock/Rayforce by the Hoot guys. If it actually works it'll be in the next MAME (and M1, and of course Hoot).

UF's done some awesome work lately on the single-Z80 games. Hopefully he can work out the goofy PCM on SMPS games (something I've chased on and off since I got Sonic 2 running).

SSV seemed to have a weirdly isolated sound driver in many of the games last time I looked at it (the main code ROMs were one place in the memory map and the sound driver was elsewhere in a separate ROM) so it may be a possibility. No promises though.
by unknownfile at 8:11 PM EDT on July 31, 2008
There are a multitude of suggestions that the samples sent to the DAC are actually decoded from something, but there is no code in the Z80 memory that says that they are. Perhaps the entire thing's just a case of improper emulation but I'm not going to count on that.
by DChronos at 8:41 PM EDT on July 31, 2008
I don't hear what's wrong with Gunlock in Mame... I hear drums and everything fine, the music is synced right, sounds right, and everything. What's wrong with it?
by Richter X at 1:42 AM EDT on August 1, 2008
If it'll help any, there's been recent documentation discovered on the YM2608, which was stripped down to become the YM2612. Needless to say. All the major sound emulation bugs have been fixed with this documentation, especially the GEMS/Flashback bug.

http://www.spritesmind.net/_GenDev/forum/viewtopic.php?t=386&postdays=0&postorder=asc&start=0

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