78081g503.ic655 Not — Found

The file might physically exist on your drive, but the system configuration paths or registry entries pointing to its directory have become corrupted.

: If you are using a Split or Non-Merged romset, ensure you have the necessary BIOS files in the same directory as your game ZIP.

To understand the error, one must grasp a few key MAME concepts:

If the file was completely deleted or corrupted beyond repair, reinstalling the software package is the cleanest solution. 78081g503.ic655 not found

To help narrow down the exact cause of your issue, please share a bit more context:

The ZN-1 and ZN-2 boards used a modular design. A typical game consisted of a main motherboard (which contained the "ic655" chip) and a separate game cartridge or ROM board that contained the game's specific code and graphics. The chip labeled "ic655" on the motherboard appears to have been used across many different games produced for the platform.

Action: If found, copy and paste the file back into the root \bin or \config folder of the program throwing the error. Step 2: Check Antivirus Logs and Quarantine The file might physically exist on your drive,

: You typically need a BIOS set named coh1000c.zip , coh3002c.zip , or taitogn.zip depending on the game.

The system registry or a .ini file may be pointing to a version of the file that has been superseded or deleted during a cleanup. Step-by-Step Troubleshooting Guide 1. Verify File Existence via Manual Search

The error indicates a missing BIOS or ROM file required by the MAME (Multiple Arcade Machine Emulator) to run specific arcade hardware, specifically the Sony ZN-2 motherboard. To help narrow down the exact cause of

Which (Windows, Linux, or macOS) are you running?

An update or installation process was interrupted midway, leaving the file system incomplete.

The file 78081g503.ic655 is a security or logic chip dump that is extremely difficult to extract from physical arcade boards. Because there is no "good dump" (a verified working digital copy) available in the public domain, MAME lists it as a required file but marks it as missing.

This extension is frequently associated with Instruction Codes or Integration Components used in embedded systems, PLCs (Programmable Logic Controllers), or specialized CNC machinery.