Old Style Keyboard

[jimmyy]

Hey All
I have recently aquired an old fujitsu mainframe terminal keyboard
circa 1990. its awesome- 3+ kilos, 128 keys, 48 of which are programmable.....
problem is, i have no idea what kind of port it uses. apparently the
keyboard plugged into a cable which was hardwired into the mainframe so
i have no chance of getting that back. it looks vaguely like a female ps2/din8 hybrid. pin wise (well,whatever the female pin equivalent is...socket?) going from the top, it has: 2,3,2,1

im not sure what kind of mainframe it was used with, but i asked one guy who *should* know but is a bit clueless and he said it was a Fujitsu.

Details are as follows:
Manufacturer: Fujitsu
Model name:F6684KC5
S/N:505698

assuming i ever find out what kind of port it is, do you think it would be possible to build an adapter?
ps/2 and serial mice for example - cant build an adaptor because they send different signals (or so i understand). would this be a similar situation?

i know its chances are slim as its probably mapped soley for the old
terminals, but i would really like to get this old beast back up and
running.
any help would be greatly appreciated.
thanks in advance.

[dave computer]

maybe a old "at" style keyboard?