I have the 9100A system also, with most of the options (probe, timing module, Z80, 6502, 6809 PODs and the I/O modules and clips). I've only recently gotten into programming this system. For the basic tests through the POD, it's not that difficult to program, but there are some functions that I would like to implement that I have not been able to make work. In particular, communication with the I/O module seems to be difficult (or I'm just missing something). Jeff was kind enough to loan me the programming manuals for this system which I need to finish scanning and put them up on Spies. I'm about 3/4 of the way there, so maybe I can find the time to finish them up soon. -Chris To UNSUBSCRIBE from techtoolslist, send a message with "UNSUBSCRIBE" in the message body to: techtoolslist-request@flippers.com. Please direct other questions, comments, or problems to jrr@flippers.com.