78081g503.ic655 -

This part number appears to be a specific reference for an Allen-Bradley/Rockwell Automation 1771-OBDN Output Module (or a compatible derivative). The suffix ic655 often refers to the General Electric Series Six/IC655 product line, suggesting this may be a legacy interface or a specific catalog entry for an 8-Point Discrete Output module.

This file serves as a component for several arcade system boards. Without it, games built on these systems will not launch in MAME. 78081g503.ic655