I don't have a solution, only the same problem, but with a Tektronix
4200 series graphics terminal. Keyboards are rare, there is one on ebay
for $700, yikes!
However, I do have 2 of these terminals and one working keyboard.? Was
starting to go down the path of intercepting the startup, POST exchange
that occurs, then trying to adapt a common PS/2 keyboard.
I was looking for minimal capability, not perfect emulation.
On 2/20/2022 10:46 AM, Jules Richardson via cctalk wrote:
A friend of mine has just acquired an Indigo (R4k with XZ graphics
option), but of course it's the usual story and the keyboard/rodent
had been lost. In absence of the genuine items they'd still be happy
with a USB converter (at least for the time being), but it seems those
are difficult to come by at present, too.
Does anyone happen to have a surplus converter suitable for these
machines, and/or keyboard/rodent? (according to sgistuff keyboard is
p/n 9500801 and mouse p/n 9150800)
[side note: they mentioned a USB converter, but I'm pretty sure years
ago someone had implemented an adapter to PC-friendly PS/2 parts, too.
I'm sure something like would do the trick, too]