Battle Bakraid Unlimited UO131 and UO721

[nem]

I bought sheepnova's slightly broken Battle Bakraid Unlimited PCB. It boots to an eeprom error. The eeprom on the board has already been replaced at one point, it's a CSI 93C66S. I assume a 4kbit EEPROM is correct for this board? Can someone check their board? With the jamma edge facing down, it's on the top, to the right of the Z80, UO721.

The board also has the 4-pin reset IC replaced with a 3-leg T518B. Looks bad on an expensive board. I might change that as well. Is the original a PST575 as written on the silkscreen? This one sits right above the 32MHz X011 crystal, UO131.

Thanks!

 

[nem]

I just hot aired the CSI EEPROM off. Board silk screen calls for a 93LC86, which is 16 kbit? That sounds a lot.

So I booted mame and the NVRAM file for bbakraid is 512 bytes, so 4kbit it is!

 

[A-M]

I checked on mine, the UO721 is a 93LC66A and the UO131 is a 575D. Good luck for the repair!

 

[nem]

I checked on mine, the UO721 is a 93LC66A and the UO131 is a 575D. Good luck for the repair!

Perfect, thanks!