The Panasonic or sony CD players that connected to old SB-16 and pro cards are easy to interface... The 8 bit thingie on the EII could be hacked to communicate with themmm... Then we could program an ISO9600 fat recognition and store calc programs on CD... ;) The EII port is very unfunctional though... It would be easier just to use some discreate in the first place or design a new AVR... Grant