: IC501 is the location identifier on the Dreamcast PCB, and MPR-21931 is the specific Sega part number for the mask ROM chip.
If you arrived here trying to fix Demul, not real hardware: demul mpr- 21931. ic501
Or the emulator simply refuses to boot a game, showing a black screen with that missing ROM component in the log. : IC501 is the location identifier on the
or arcade system (like NAOMI) on Demul and need help configuring the plugin directories? demul mpr- 21931. ic501