3 comments

1

Very nice overview.

Just one note, RS-232 still exists and is still used a lot. In Arduino projects and probably most USB device where there is an FTDI chip or FTDI-like clone that converts USB data to serial data for internal communication.

1

You haven't lived until you've constructed a null modem cable and connected two terminal devices with it. I still have mine in a shoebox downstairs, though I'd have to write a driver to make it work again. (Fuck, let's hope I never have the need.)

0

confusingly, DB-25 came to be used for printer parallel ports (which originally had a very different connector)

Centronics