Replacing the GPU on a Wangan Midnight Maximum Tune 3DX+

[nem]

WMMT3DX+ uses a custom bios for the GPUs. English language (Export) version wants a GeForce 7600GS and the Japanese language one will need a 7800GS. If you pair it with a wrong card the game will boot to a 'Failed to mount img' error.

I tried putting these cards into a regular computer to dump the bios with NvFlash, but the computer wouldn't boot at all with either card. A motherboard with onboard video and an AGP slot could work, but I didn't have one at my disposal.

No matter, the bios is stored on a 512Kbit serial flash. Let's just rip that out.

GeForce 7600GS



Bios is stored on U504. Original chip is a PMC PM25LD512.

GeForce 7800GS



Bios is stored on U3. Original chip is an Atmel AT25F512AN.

Both files in attachments below.

 

[Mrhide]

haha ! nice work

 

[nem]

I need to replace the card in my Export version. It's displays broken graphics. I found an Asus 7600GS Silent/HTD/256M/A locally. The seller was asking three euros for it, I was more than happy to pay him five.

Here's the original card and the Asus one next to each other:



Apart from the fan, they look identical.

Since I had the programmer out, I didn't even try to flash it with NvFlash. Sorry. I ripped out U504, threw it in my programmer, erased it, programmed it and soldered it back.



It's a complete success.