In the world of PCB repair, reverse engineering, and parts sourcing, cryptic markings like 78081g503.ic655 often surface on silkscreen layers, inside BOMs, or as handwritten service notes. While not a standard JEDEC or IEC part number, this string follows patterns common to , programmed IC identifiers , or assembled module references .
: The 78081G is an 8-bit microcontroller from the NEC 78K0 family . It features: 8KB of on-chip ROM. 256 bytes of RAM. An 8-channel A/D converter. Control over analog connectors and I/O ports.
The name breaks down into standard technical taxonomy used by hardware engineers and emulators: 78081g503.ic655
Providing these details will allow for a much more precise search for the correct technical documentation.
The chip is primarily found in the following system BIOS sets: Arcade System Board MAME BIOS Zip Name Shared Core Component Key Games Affected coh1002c.zip NEC uPD78081 Microcontroller Street Fighter EX Plus , Star Gladiator Capcom ZN-2 coh3002c.zip NEC uPD78081 Microcontroller Rival Schools , Strider 2 , Street Fighter EX 2 Tecmo PlayStation System (TPS) coh1002m.zip NEC uPD78081 Microcontroller Dead or Alive++, Tecmo World Cup '98 Why the File Causes Emulation Errors In the world of PCB repair, reverse engineering,
In many technical contexts, codes like these function as specific identifiers within inventory management systems, proprietary software versions, or hardware components. For example:
(If this is for a creative writing exercise, let me know the genre). It features: 8KB of on-chip ROM
| Field | Example Value | Typical Meaning | |-------|---------------|------------------| | Prefix | 78081 | OEM base part number, date/lot code, or internal circuit ID | | Infix | g503 | Variant, voltage/grade code, or firmware version (e.g., “G” = Green, “503” = 50k pot or 50×10³ value) | | Suffix | .ic655 | Explicit IC designation; “655” may indicate a specific logic chip, op-amp, or mixed-signal device |
: Ensure you have the system bios files downloaded, specifically coh3002c.zip (for ZN-2 games) and coh1002m.zip (for TPS games).
If you have additional context (e.g., board photo, device model), I can refine the analysis further.
are notoriously difficult to "dump" (extract code from) because their internal ROM is locked at the factory to prevent piracy.