josephoswaldgg@hotmail.com (Joseph Oswald) wrote in message news:... > Ah, yes, here is the link I was thinking of > > http://www.cs.umu.se/~christer/Apple/p6.notes.html Based on the above link the *ultimate* ROM listing with explanations can be found using this (modified) link: http://www.cs.umu.se/~christer/Apple/p6.romdump.html Thanks a lot for the advice, Hans