Gameboy coprocessor cartridge

This is an archive of a topic from NESdev BBS, taken in mid-October 2019 before a server upgrade.
View original topic
Gameboy coprocessor cartridge
by on (#182595)
http://www.happydaze.se/wolf/

Not entirely clear why he used an MBC1 donor here, and that dual-ported RAM is spendy, but the results—at least on anything with a faster screen than the original DMG—are impressive.