what data does the 27c010 roms on sf2 ww contain

discgolfer72

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i have 2 sf2 ww boards here
1 has a sound problem (only plays half the sound and no fighter sounds aka when throwing fireball or punching)
the other has great sound and works ok but there is no background graffix during a fight and the charter select screen shows no fighter pictures


i tried swaping the top boards and the problems stay with the bottom boards
so im ready to start messing with new roms

i wanted to convert one to the rainbow ed but from the mame roms it looks like its the 40 pin flash roms are what contain the rainbow files

i font have my 40 pin adaptor yet for my burner so im wondering what the roms that are 27c010 that are labeled 28b to 38 b are and the 2 labled 18 and 19 are

im pretty shure the rom located at 128 wich is a 27c 512 is the sound rom


i cant seem to find a data sheet for the sf2 board

any help would be great
 
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18/19 are sound data ROMs for the D/A playback chips...

The 512k is the sound program ROM.

The other 27C010 chips are the program ROMs. They can either be separate 1Mb chips or the images combined to a single 4Mb one.

RJ
 
Thanks
I just got one working fully looks like it was a problem with the socketed chips on the a board(bottom board)
I swaped the chips marked soun1 pgr1 and the other 2 small chips of the same type from the board with bad sound over to the board that had good sound but no background graffix


So now I have 1 board with bad sound and missing background gffx
and one working board
 
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little update


i ended up getting olth the sf2 ww boards up and running
after getting the one board fully working i decided to goof around with the one that only had half of the sound

symptoms
game worked fine, no glitching ,but there were no sound effects, the back ground music would play,but no fighter sounds or back ground sfx

i asumed i had a failing or bad sound amp but since i was bored today i ended up burning a full set of pgr roms for the board and decided to chane from rev b to rev i just on the chance i had a bad sound chip

after burning the new set and installing them placed the board in my test cab and still bad sound
damn not the sound roms



so i started inspecting the sound amp so i could mabey scavange one from one of the many parts boards i have in my pile , and while i was eyeballing it
i noticed that 3 of the 10uf 16 v caps had small dents in the tops (looked like another board had sat on top of it and the solder points dented the caps (no bulging or any other normal signs of a bad cap)

so walked over to my solder station and found a few old caps i had in my just incase drawr from old monitor rebuilds

desolderd the suspect caps from the board and installed the old used ones
(btw thoes damn caps on this board are a pia to desolder dang super tiney solder pads)

plug it into my test cab and bam full sound weeeeeeeeeeeeeeeeeeeee

anmyone want a good sf2 ww baord with rev i roms lol
 
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