Has any one made a I/O card using the 8255(82C55A) CMOS Programmable Peripheral Interface chip? If any one wants info on makeing one I have found two sties on makeing a card one for IBM computers and one for GameBoy IBM http://www.boondog.com/\tutorials\8255\8255.htm GameBoy http://www.fh-karlsruhe.de/fbnw/html/Gameboy/Welcome.html Chip info http://www.questlink.com