The 83 and 83+ run at 6 Mhz, the 83+SE runs at either 6 or 15 Mhz (switchable by outputting some value to some port). > Since the > calc only runs at 6 or (12?) MHz, timing constraints would not be a > problem. ... > -Tom > -- +++ GMX - Mail, Messaging & more http://www.gmx.net +++ NEU: Mit GMX ins Internet. Rund um die Uhr für 1 ct/ Min. surfen!