78081g503.ic655 Jun 2026

| If found on... | Likely meaning | |----------------|----------------| | PCB silkscreen near an IC | Internal designator (e.g., IC655 = IC #655 on the board; 78081g503 = lot/date/supplier code) | | Barcode or inventory sticker | Warehouse tracking number | | Schematic/BOM | Custom part number | | Chip surface marking (laser etched) | Possibly a house-marked part |

If you struggle with missing dependencies, utilize a "Non-Merged" ROM manager. These toolsets clone all mandatory BIOS data directly into the individual game zip file, ensuring it functions independently.

On these systems, this microcontroller sits right next to the motherboard's analog connection layout. It acts as an I/O subsystem handler that translates analog real-world movements (like steering wheels, gas pedals, or specialized joysticks used in driving or flight arcade cabinets) into digital signals the motherboard's main processor can read. Why MAME Displays "NOT FOUND (NO GOOD DUMP KNOWN)"

: Requires placement in the correct MAME roms folder, typically within the parent BIOS zip file. 78081g503.ic655

If your collection utilizes a , the execution layer will crash if the common system file ( coh3002c.zip for ZN-2 or coh1002m.zip for TPS) is missing from your global directory path. Troubleshooting and Resolving "IC655 Not Found" Errors

To help you get your games running smoothly, please let me know:

33 I/O ports and a 3-wire serial interface (USART) | If found on

: This specific file was officially added to MAME in version 181 .

For more information on the MAME source code that handles this, you can look at the MAME Github repository for taitogn.cpp .

) serves as a specialized I/O controller on these boards. In the Taito ZN-2 system, for example, it is responsible for handling analog inputs, such as those used in racing games. Key technical aspects of this microcontroller include: 8-bit 78K0-family microcontroller. Memory: 8k ROM and 256 bytes RAM on-chip. On these systems, this microcontroller sits right next

⚠️ Use proper ESD protection and safe voltages.

If you are an emulation enthusiast who has encountered a missing 78081g503.ic655 error, here is a practical guide to dealing with the situation.

: In MAME version 0.181 , developers successfully dumped or identified the exact microcode residing on the ic655 chip. Prior to this version, MAME either used a high-level emulation (HLE) workaround to bypass the chip or simply did not require it because they hadn't yet mapped that part of the hardware logic.

Suggest for those specific games. Let me know how you'd like to proceed . MAME 182 - several roms not working

: From version 0.181 onward, MAME expects the complete, authentic hardware layout to be present. If your BIOS zip files ( coh3002c.zip or coh1002m.zip ) were sourced from an outdated ROM set pre-dating 2017, they will lack this specific file, causing the system initialization to fail. Troubleshooting and Resolving the Missing File Error