Noob Psikyo ROM chip question

[Capitalistix]

If one had, say, the Japanese version of Sengoku Ace II, is that a board wherein the ROM chips could be swapped for the English version (either genuine chips or burnt EPROM copies/backups) known as Tengai overseas? Or is there more involved on Psikyo boards than that?

 

[ekorz]

Here’s the mame driver https://github.com/mamedev/mame/blo...66b95cb32031/src/mame/psikyo/psikyo.cpp#L1768

Compare CRC to see which chips are different. Only “main cpu” program roms u40 and u41 are different, so those would be your target. (Not often but sometimes regions also need some gfx or sound differences)

4-U59 is listed as an undumped security chip so that might block you, though typically the security is the same between regional revisions of a game.

For bonus points, unzip both rom files into separate folders inside mame/roms (eg mame/roms/tengai) and then delete the zips. Delete the two program roms from one folder. Rename and replace the other game’s program roms into that folder. Launch from a command line and see if you converted it in emulation!