New means of dumping microcontrollers for Jaleco Mega System 1 games (e.g., 64th St. - A Detective Story Performance Boosts:
MAME is an open-source emulator that aims to document and recreate the hardware of arcade machines. Version 0.261, released in late 2024/early 2025 (depending on the development cycle), is a testament to how active the project remains, decades after its inception. Mame 0.261 Full Roms
Note: If you downloaded a "0.261 full set" but have files from 2019, you have a bad set. MAME updates require you to "rebuild" your collection from a newer source. New means of dumping microcontrollers for Jaleco Mega