In some cases, you can create a dummy 78081g503.ic655 file that returns a “present” signal. This is risky but can bypass the error for testing. Use only if you have a complete backup and understand the system's boot sequence.
The file 78081g503.ic655 seems to have a unique name that could be associated with a specific application, driver, or data file. When your system or an application indicates that this file is not found, it usually means that: 78081g503.ic655 not found
(MCU) used in Sony ZN-1, ZN-2, and Taito TPS hardware. In many versions of MAME, this file is flagged as "NO GOOD DUMP KNOWN," In some cases, you can create a dummy 78081g503
: Search for a "MAME BIOS Pack" that matches your current MAME version (e.g., "MAME 0.275 BIOS set"). Place Files Correctly : Ensure the BIOS file is placed in your MAME folder. Do The file 78081g503
Because the filename looks like a random string, some heuristic scanners mistake it for malware. Open your antivirus "History" or "Quarantine" tab.
Last updated: October 2025. If you have encountered this error and found a different solution, please contribute to technical forums to help others facing the same issue.
This article provides an in-depth analysis of what this error means, where it commonly originates, step-by-step troubleshooting methods, and how to prevent it from recurring.