HD6301V1
8bit microcontroller used for multiplayer communication in cartridges like League Bowling.
Clocked at 1Mhz using the 4MB signal (clock input divided by 4 by HD6301).
Datasheet
Official datasheet: [[1]]
Code
HD6301 has a 4KB ROM section holding program data. A dump is available, coming from a prototype Riding Hero cart: File:HD6301.zip - Credits to NeoTurfMasta for the dump and share.