Wondering if what you're seeing is the equivalant of a "System Check" on a tac 50?
ZModem is a file transfer protocol. The great thing about it was if you got disconnected from the other party while uploading or downloading a file, you could reconnect with the other party, and it would re-start the transfer where it was terminated. Rather than starting the transfer at the beginning, like you had to do with X modem. For those of us old enough to rememeber the Compuserve, Bulletin Board days, ZMODEM was a blessing. Especially at the blazing speed of 2400 BPS.
When you get connected in hyperterm are you in the "FAST TOOL" mode where commands like "SCC", "FLT" etc. After you upload the "DAT" files does the screen paint to an I/O screen?
Just wondering.
Thanks.