On Mon, Jan 30, 2023 at 6:47 PM Fred Cisin via cctalk
<[email protected]> wrote:

> The 5150 had a cassette port!
> Diagnostics were supplied on cassette tape.

[...]

> There was an outfit that marketed a sorta network using the 5150 cassette
> port, for classroom distribution, etc.

There was the Radio Shack Network 2 which worked like that. It was
originally designed for use with TRS-80s (a master disk system used by
the teacher and diskless machines used by the students). I've never
heard of it being used with the 5150 but I suspect it would work.

I did hear of people using the motor control relay on the 5150 (you
could control it easily from Microsoft BASIC, for example) as a
single-bit output to key a CW radio transmitter (morse code), etc. And
I think I read of somebody who used a 5150 as a sales cash register
and used the relay to release the cash drawer.

-tony

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