I don't believe that the RS-232 shifter that I am using for this supports DTR/DSR loopback. I'll try a different shifter tomorrow and see what happens.
Thanks. On Tue, Nov 28, 2017 at 5:19 PM, John R. Hogerhuis <[email protected]> wrote: > Are you looping back DTR to DSR? Not sure that it should matter but that’s > one thing to try. > > M100 programs sometimes check DTR. Nothing I know of except HTERM and TBACK > use RTS/CTS. > > And this is just transmitting so the 64 byte receive queue doesn’t really > enter into it. > > — John. -- Ron Lauzon - rlauzon at acm dot org Homepage: http://webpages.charter.net/rlauzon/ Weblog: http://ronsapartment.blogspot.com/ TRS-80 Pocket Computer 2 - TRS-80 Pocket Computer 4 - TRS-80 Model 100/102 Some people like to work on old cars. But old computers are cheaper and don't require a big garage.
