Hm, the mismatch is caused by an in-game SRAM checking routine, so no clues there. The game fills each SRAM byte with a pseudorandom value, reads it back to verify and then restores the original value.
http://sd2snes.de/files/v0.1.4test/fpga_base.bit <- please put in sd2snes folder
Does this change anything? All it does is give the SNES address a bit more time to stabilize before taking the value from RAM. (assumes longer address setup time).



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