I didn't notice that last post didn't include any quoting. Meant to reply
to Josh, and neither contradicting nor adding to what Mike already said.

On Fri, Aug 11, 2017 at 6:13 PM, Brian White <bw.al...@gmail.com> wrote:

> It's wired as DTE, but with a female connector. *That's* what makes it
> backwards, not merely the female connector by itself.
> If it were a female connector, and wired as DCE, that would be unusual for
> a computer, but it would still be conforming to the same conventions as
> everything else.
> When you buy a random serial cable with male pins in a 25 pin connector,
> if you know nothing about the insides of the cable or where it came from or
> what the original packaging said etc, 99 44/100ths of the time that
> combination expects to be plugged into a modem, or other DCE device. The
> M100 isn't a modem, but if it's connector were wired DCE, that "modem"
> cable would still work.
> *today* such a plug would have an extra dimension of wrongness because it
> would be ambiguous with a printer port, but at that time, D25F might not
> yet have become a standard for parallel printer ports. It doesn't matter
> that the printer port on the M100 itself isn't confusable with it's own
> serial port, it's still a factor as long as a significant number of
> printers and their cables out there can physically plug in to the wrong
> port. At the time, that might not have been true like it absolutely is
> today.

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