On 2/1/25 09:42, Frank Leonhardt via cctalk wrote:

> You could get other interfaces as add-on boards, including RS-232,
> Apple, TRS-80 and IEE488. I believe they got a 50% of market share for
> printers with this, from a standing start.

I vaguely recall that the MX-80 came with the parallel interface as the
default; serial EIA was an option.  I rigged something up using a 9V
battery and some random logic added to the printer to get serial to work
without buying the option.

--Chuck

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