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  /  78081g503.ic655

78081g503.ic655 Jun 2026

: Ensure you have the system bios files downloaded, specifically coh3002c.zip (for ZN-2 games) and coh1002m.zip (for TPS games).

The explicit .ic655 suffix indicates the component is an (IC) and likely the 655th unique IC in a larger library or schematic set. In repair contexts, “IC655” could refer to: 78081g503.ic655

Ensure you have the required parent BIOS files inside your active MAME roms directory. For ZN-2 and TPS games, you need updated versions of coh3002c.zip and coh1002m.zip . 2. Match Romset Versions : Ensure you have the system bios files