DEC lk201 keyboard for DEC Terminal vt220

[Jan-Benedict Glaw]

On Sat, 2018-09-15 16:14:53 +0200, Carlo Pisani via cctalk <cctalk at classiccmp.org> wrote:
> hi
> about DEC lk201 for DEC Terminal vt220,
> I am looking for information about
> - the pinout of the connector (it should be 4 pins, sort of serial)
> - the protocol used
> - key keymap

There is extensive documentation around. If you look at Linux's
lkkbd.c[1], you'll find the pinout, how to build an adaptor to use it
on a regular serial port and a pointer to some scanned PDF[2] where
the hardware and protocol is descriped in depth.

MfG, JBG
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/input/keyboard/lkkbd.c?id=HEAD
[2] https://vt100.net/manx/details/1,21
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