CPS2 B-Board Problem "Mixed music, voices of creatures"

[chacal231077]

Hi!

I bought a Japanese Street Fighter Zero 2 B-Board in very good condition.

I replaced all the Street Zero 2 EPROMs and MaskROMs with the ROM Set (I was just missing the 8 27C4096" EPROMs
and Original MaskROMs from Vampire Savior Vampire Savior: The Lord of Vampire.

I successfully programmed the Japanese ROM sets on the 10 EPROMs, configured the correct ON/OFF jumpers, and installed the correct CPS2 Suicide Free Modchip and the correct assembly that goes with the board revision 93646B-3.

I have a sound problem, such as Mixed Music and Voices of Creatures.

I thought it was a timing issue with the EPROMs at 105 and 150 ms, so I reprogrammed them with HITACHI HN27C4096HG-85s to be sure, but the problem is still there

.Thanks for your help

 

[GoldenGlover]

What revision B board & what PAL are you using?

 

[chacal231077]

Hi! GoldenGlover

I programmed a PAL-G on GAL16V8B10LP , I even tried with an infinity key same problem

 

[GoldenGlover]

What B board type are you using (is it a revision 3, 4, 5, 6 or 7) & do you have a green wire soldered underneath it?

 

[chacal231077]

I Have a board revision 93646B-3 so this is Revision 3 and I have no green wires underneath

 

[GoldenGlover]

The only suggestion I can make (aside from reburnung your program roms & verifying that they’re valid) is to make sure the traces are cut between the open jumpers. Even if they look separated, they can sometimes still be connected in the middle by a very thin trace. Hopefully that fixes your issue.

 

[chacal231077]

Hi!

I've taken matters into my own hands and will start again step by step.

First, I restored Street Fighter Zero 2.

Everything is fine, no sound issues.

I suspect Maskroms 11 and 12 are the culprit.

I have two identical semi-complete Vampire Savior sets. Both sets were missing EPROMs 3, 4, 5, 6, 7, and 8.

I'll find a real download site with real, unmodified ROMs for emulators, or if someone could offer me their dumper set via Mega nz in a PM, that would be great.

Then, I'll program everything on two 27C010s, two 27C160s, eight 27C4096s, and the rest of the GFX on 27C322s.

And I'll run the tests by reconfiguring the jumpers. If it works the first time, it means that one or more Maskroms are defective on the original Set

 

[ForestOfDreams]

Rev 3 & 4 need that wire added for pal G

 

[chacal231077]

Rev 3 & 4 need that wire added for pal G

Hi!

Is this the wiring for the PAL-G ?

Lift the leg off the PAL and connected to pin 13 of CN3 ?

 

[GoldenGlover]

You can remove that wire if you’re using a G PAL. Try it & see if that clears up your sound issues.

 

[ForestOfDreams]

Color me confused. Is it only required on F pal?

 

[xodaraP]

F PAL and G PAL both require a jumper on rev 3/4 but to different pins

Did you replace the EPROM/s at 1 and 2?

What size and type of EPROMs are you using for 1/2 and for 11/12?