I've received some ideas about the microcontroller I asked about. These include internal EPROM, not EEPROM and external serial EEPROM for data storage. I don't want to use EPROM if possible as it makes program development slower. As for serial EEPROM, doesn't that have a limited number of write cycles?? Bryan -- --------------------------------- BRYAN CROTAZ - b.crotaz@ic.ac.uk --------------------------------- TECHNICAL MANAGER Student Television Of Imperial College Beit Quad, Prince Consort Road London SW7 2BB Tel. 071-594-8104 Fax. 071-225-2309 attn. STOIC