NewDOS80, Z80... wow, you win the topic! :^) So, a TRS-80? THe oldest thing I've used, and it was a while ago of course, was a S-100 bus Z-80 CP/M system that was floating around work. There was a terminal, attached to the CPU, which was a great big box holding the mobo and two eight inch floppy drives. There was also an Okidata dot matrix printer that used typewriter style open reel ink ribbons, and didn't print with true descenders. It was cool. :^) The only Z9-s around here are a bag of old T1000 Timex "doorstops" my dad picked up to see all about this computer thing. They were fun to tinker with, but the 16K external memory pack would wobble a little while I tried to type on that wafer keyboard, the contacts would lose track of the edge connector, and poof! All was gone. Solid state OS though, that was nice. :^)
My, what a RF noise generator. Could not run it anywhere near my radio equipment.
So I later bought a Hal TTY, Badot/ASCI keyboard. It worked quite nicely. But it never was the TTY demodulator that the Fleisher TU-170 was. Wished I had not sold the Fleisher. Amazing sensitivity and selectivity for TTY.
My first computer was a TRS-80 MicroColorComputer.
Had to connect it to a tv (didn’t have a monitor).. if I wanted to save whatever I had thrown together from the weekly programming magazine back then, it had to be saved on a cassette tape (I remember it used to take 30 minutes to an hour to save a few kilobytes :p).
Can’t forget the 300 baud cradle modem :p