My understanding was that OS-9 allowed the Radio Shack Color Computer II to support 2 users without lagging, one on a terminal, and the other locally, even thou

My understanding was that OS-9 allowed the Radio Shack Color Computer II to support 2 users without lagging, one on a terminal, and the other locally, even though it only had a bit-banging serial port to talk through to the terminal. All from a single floppy drive. I always wanted to try it out, never got the chance.