Use an off-the-shelf video DAC board (e.g., a GBS-8200) modified to accept the digital signals from the NAOMI. This is complex but has been done in arcade restoration projects.
If you find mpr-21931.ic501 elsewhere (e.g., another game’s zip), just copy it — each file is game-specific and will fail the CRC check. You need the exact match for your game. demul mpr- 21931. ic501
Highly specialized for specific, niche electronic functions rather than general-purpose use. Use an off-the-shelf video DAC board (e
For those interested in delving deeper into the world of Demul and MPR-21931/IC501, we recommend exploring the following resources: You need the exact match for your game
Demul is a highly accurate emulator, but it is notoriously strict about its file naming conventions. If you receive a pop-up stating unable to find mpr-21931.ic501 in romset dc , it typically points to one of three issues:
If you want, I can:
Last updated: October 2025. Information based on community reverse-engineering and field repairs. No official datasheet for MPR-21931 exists.