Hello, once i red a forum member who used a 27c020 to replace a broken sm1 but 27c020 hasn't same sm1 pinout. did someone remember the schematics that he used?
Thank you for your answer. I have some issues because sm1 has same 27c1000a pinout as i can read on neogeo wiki , but the 27c301 ha pin 2 and pin 24 swapped. i also noticed that 27c1000a has same 27c010 and 27c020 pinout.
EDIT: i build an adapter to swap pin 2 with 24 but unfortunatly the sm1 unresponsive error persist. :\