Final Fantasy VI Repro SNES

Hi,

I am trying to make a FFVI repro for SNES. I have a FFVI jap cartridge, and I would like to replace the ROM with the FFIII [USA] version of the game. I have done many repros before in the past, but mainly with the m27c801 chips and now I'm experimenting with the m29f032 on the adapter boards.

My question: The original ROM is 24Mb and is spread over 2 chips with a MAD-1 to handle the split. How do I replace these with a m29f032? Can I desolder both and simply put a single 032 where the P0 chip was? Or do I need to split the ROM over 2 032s and solder them into both P0 and P1? If I'm using one chip, do I need to somehow bypass the MAD-1?

Below is a picture of the PCB. Thanks for any help, guys.

 

Desolder the U1 P0, leave the other one in.

• Leg 2 is currently connected to Ground, instead this needs to go to Cart Edge Connector 46, which is also linked to MAD-1 Decoder Leg 13 (purple wire)
• Leg 33 is currently connected to MAD-1 Leg 16, needs to be connected to MAD-1 Leg 4 instead (orange wire)
• Leg 35 is currently connected to Ground, instead, this should to go to Cartridge Edge Connector 48 which is A22, the 29F032B doesn’t use A22 though, so we can ignore this one

http://www.mmmonkey.co.uk/converting-mother-2-cart-to-earthbound/

 

Great, that's exactly what I was looking for! Thanks. Would this method work for any game that has 2 Mask Rom slots, and you want to replace them with only 1 m29f032? It would seem so to me...

As an aside: I was considering dremeling the side of the adapter boards themselves to make them fit inside the cases without removing that support post, this would require the rebuild of a trace or two but at least you wouldn't have to modify the case at all. Anyone else do this?