wire job for rolling thunder (rambo pcb) for Xybots?

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wire job for rolling thunder (rambo pcb) for Xybots?
by nintendo2600 on 2010-01-28 (#55834)
Hey,

I was wondering if anyone has the schematic for the wire job needed when turning the rolling thunder version of the the tengen "rambo" pcb into a suitable board for use with the xybots proto please.

Thanks!!

by nintendo2600 on 2010-02-02 (#56087)
no love? :oops:

by Memblers on 2010-02-02 (#56103)
Prototypes are by definition unique. If you're sure it's "just another mapper #x" game, then all you need is the pinout of the Tengen MaskROM.

by nintendo2600 on 2010-02-08 (#56310)
Memblers wrote:
Prototypes are by definition unique. If you're sure it's "just another mapper #x" game, then all you need is the pinout of the Tengen MaskROM.


I have no clue, all I know is that Skull & Crossbones is a proper donor for standard eprom modification use and the Rolling Thunder can also be used BUT it needs more address lines rewired.

Rolling Thunder seems to be a more involved PCB with extra logic on the board compaired to Skull & Crossbones so I assume, but don't know how, to circumvent this additional logic.

Anyhow, I have no clue currently how to make this and I would like to know how if someone with the info would kindly share it please.

by coinheaven on 2010-02-08 (#56318)
yea use skull and crossbones. straight solder in a 27c512 chip for the CHR and wire the PRG like a TLROM. thats it, pretty simple

by nintendo2600 on 2010-02-08 (#56321)
coinheaven wrote:
yea use skull and crossbones. straight solder in a 27c512 chip for the CHR and wire the PRG like a TLROM. thats it, pretty simple


OK will do. Was just trying to have more options as I come across Rolling Thunder alot more than Skull & Crossbones locally. Thanks for the info for sure. I'll just grab Skull & Crossbones off ebay :)