POW pcb

[sukhbir]

repairing a original snk pow pcb at the moment where it has issues with sprites,I’ve come to a conclusion that the mask roms which hold the data are corrupt.
The version I have is without the daughter board,my board instead has 4xmask roms soldered In the pcb.
From the web I’ve found out that these roms are 512kb and are pin compatible with a 27c400 eprom.
Ive removed 1 mask rom and dumped it but not recognised in romident?
Has anyone got the dumps for these mask roms?

POW8804
POW8806
POW8803
POW8805

 

[TheDaddy]

These :-

POW8804
POW8806
POW8803
POW8805

Do not match any of the rom names withing MAME. Depending on the set these are the roms




Dave.

 

[sukhbir]

Hi,
The Romset you have shown is for the pcb which has the daughter pcb populated with eproms which holds the sprite data (gfx2).

That's the trouble I can't find the dumps for my single board 😖

 

[TheDaddy]

Can you confirm the size of the roms you have ?? Have you a picture of the board or tell me how many graphics roms there actually is on the board.

Either way you will need to merge the 1024 roms & burn , You can read the ones you have , split the files and then check with romident.

Dave.

 

[favouredson]

They are in the powa set in MAME and are just the smaller ROMs combined.
I have just had a play and combined them and the checksums match those listed in MAME.
Here is a zip of just the graphics ROMs.

 

[TheDaddy]

They are in the powa set in MAME and are just the smaller ROMs combined.
I have just had a play and combined them and the checksums match those listed in MAME.
Here is a zip of just the graphics ROMs.

FFS Yeh you are right , The only set I didnt check as I thought they all be the same !



Even says ' Mask Rom Sprites ' , Unsure how i missed that.

Dave.

 

[sukhbir]

Thanks for your help guys! so the first mask rom i removed checks out ok,im going to remove the other 3 and do a checksum.