Ricoh RF5C68 technical document found

http://www.datasheet.net/document/datas ... d=12226348

I know that this chip was used in a lot of computers and arcade boards in the late 80s and early 90s.

Thanks; it might help with implementing RF5C68 in VGMCK.

The envelope register seems interesting... FM Towns Marty may be a neat chip music machine.