The way [Glen] tackled the port is quite handy. [Glen] built a utility that would scrape a disassembled version of the original Pac Man Z80 code, look up the equivalent 6809 CPU instruction ...
In the original Pac-Man (released in October 1980 as an arcade game in Japan), the red ghost Blinky was written to follow behind Pac-Man, Pinky is tasked with getting in front of Pac-Man ...
The best game to come from the golden age of arcades started out life as a fan modification of the original Pac-Man.