deskthority

Hello everyone, i recently came in possession of an old Olivetti ANK 2502 (similar to a 25-102), apparently it's an olivetti m240/280's keyboard. Unfortunately the cable hasn't got the pc plug, it only has the keyboard plug so i don't know whether it uses an AT, XT or Serial plug on the other end, but i'd say either an AT or a Serial plug. Rubber/mech keyswitches, Double-shot injection molding keycaps, so what i want to do is, make it work on my computer, but i'm not sure the keyboard works itself cause, i retrieved it into my old school, and it was among other old electronic stuff, pc, etc...

I tried soldering a PS/2 connector to the other end on the cable, i checked all the connections, i'm pretty sure i connected in the right way, VCC and GND, since if i plug it into the pc, the LEDs turn on, but it's all that happens, no response from pc or keyboard, i checked if all the ICs and the uC (an old intel D8749H) get supplied, and they all do, i checked if all the resistors work, and if the electrolytic cap is ok, and everything seems fine, so i'm pretty sure it's all about the Data cables. The plug has 6 wires (5 used), 1 is VCC, 1 is GND, there's another GND wire for some reason, so only 2 left, i suppose both for keyboard control, i tried connecting them both to clock and data, nothing seems to change.

Red: VCC
Green: control (clock? data?)
Yellow: control (clock? data?)
White: GND
Blue: GND

Could be possible that the keyboard is supplied with 12V but i'm not sure, i checked all the datasheets, and except one that should be supplied at 7V, the others are all 5V.
Any idea?

more pics: http://imgur.com/a/70WYZ

Is it this one?

http://deskthority.net/wiki/Olivetti_ANK_25-101

That would mean that it should probably be PS/2 signal-wise. About the older 24 models I'm not so sure, they had some more creative protocols.

http://www.win.tue.nl/~aeb/linux/kbd/scancodes-2.html

The ICs on the photo are all standard TTL ICs, so I'm pretty sure this will work with 5V.

Halvar wrote: ↑Is it this one?

http://deskthority.net/wiki/Olivetti_ANK_25-101

That would mean that it should probably be PS/2 signal-wise. About the older 24 models I'm not so sure, they had some more creative protocols.

that's the 25-102, mine is 2502 like the one in the photo i linked, anyway someone said it uses a olivetti protocol, but as you said every ICs in there, is supplied with 5 volts, so i guess it's doable, but i don't know how, it just doesn't respond, all 3 LEDs on, and it doesn't work at all.