It looks like you are dealing with a missing BIOS or ROM file for MAME (Multiple Arcade Machine Emulator), specifically for hardware using the Sony ZN-1/ZN-2 or Taito G-NET systems.
Search for the File:
Most enterprise-level software includes a self-healing tool. Go to Control Panel > Programs and Features. Select the problematic software. 78081g503.ic655 not found
Then restart Virtuoso.
(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," It looks like you are dealing with a
| Cause | Explanation |
|-------|-------------|
| Missing library in cds.lib | The library containing 78081g503 is not defined or commented out. |
| Wrong library search path | cds.lib points to the wrong directory for that library. |
| View not created | The cell 78081g503 exists but has no ic655 view (maybe only schematic or layout). |
| PDK version mismatch | PDK updated and renamed views (e.g., ic655 changed to symbol). |
| Case sensitivity | Library/cell/view names are case-sensitive in UNIX/Cadence. |
| Corrupted library cache | cds.lib cache files (cdsXlib.*, libManager.cache) cause stale references. |
| Reference from another library | A higher-level cell references 78081g503 ic655 from a library that isn't attached to technology or is missing. | Select the problematic software
The key takeaway: never ignore a “not found” error. It is rarely a false positive. Whether it’s a missing configuration file or a dying integrated circuit, early diagnosis prevents catastrophic system failure. By following the steps outlined above, engineers and technicians can restore functionality and document preventive measures for long-term reliability.