Mike Guidero <mike@bogus.net> wrote in message news:<unfhja2mf4uce8@corp.supernews.com>... <SNIP> > Address translation table: > Z80 address 6502 address > $0000-$AFFF $1000-$BFFF > $B000-$DFFF $D000-$FFFF > $E000-$EFFF $C000-$CFFF > $F000-$FFFF $0000-$0FFF Well, that gives me my RdZ80() and WrZ80() functions... :) I can start work on ds80io.c from there... It's something to start with. Thx :)