>> OK, who claims to have entered their program completely from the front panel switches? Well, now that you mention ... Fox 2/10 - bootstrap loader, of course, but also a 256 word (yup; didn't know what "bytes" were back then) a 256 word debug program that ran exclusively on keyboard interrupts and ran in the background to a running process control system. There was no program development software available in the field, so in was assembled with pencil and paper. Those were the days .... William C Ricker FeedForward, Inc. _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave