>.A list of all out(ports (i.e. 'out($10)' is LCD, 'out(1)' is keyp, etc) > and their funcs/how to work w/them TI-PORTS.TXT on http://www.ticalc.org has a list of the ports & what they do. >.Some way to gain access to the Z80's internal clock There isn't one, the best and only way to time is by interrupts.