78081g503.ic655 (2026)

For those looking to repair physical original arcade hardware, the 78081g503.ic655 is a significant hurdle. Because it is a microcontroller rather than a standard EPROM, you cannot simply dump the data and burn it to a new chip without having the original, un-protected chip, which is often rare or unavailable.

A built-in 8-channel A/D converter and a 3-wire serial interface. 78081g503.ic655

settings (MAME, RetroArch, etc.).