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AuthorTopic: CDTV Keyboard  (Read 642 times)

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Offline jimbob

CDTV Keyboard
« on: January 03, 2004, 06:56:57 PM »
Does any one know or can anyone point me in the right direction to find out some info about the CDTV keyboard?

I've managed to get hold of one, but the 5-pin mini-din on the end of the cable has been replaced with a 9-pin D-type connector.

What I intend to do is to take a 6-pin mini-din off the end of one of the dead PC keyboard I have lying around and put it on the end of the CDTV cable. There are 5 cores in the CDTV cable: black, red, white, orange and yellow. Black is earth and I'm assuming red is +5v, but does anyone know what the others are.
 
Ta,
John
A1000, A500, A500+ with A501+ and A570, CDTV, A1200 030@50MHz Tower
 

Offline PaSha

Re: CDTV Keyboard
« Reply #1 on: January 03, 2004, 07:31:08 PM »
Yikes.. 9-pin D-SUB? probably some DIY A1200 keyboard hack...
There's a file on Aminet, http://aminet.back2roots.org/pub/aminet/hard/hack/a2k2cttvKBD.lha containing some keyboard pinouts. But IIRC this file is swapped with http://aminet.back2roots.org/pub/aminet/hard/hack/a2kVSA5hKBD.lha
Anyways, download both and have a look. As for figuring out what color goes where, the best solution would be to have a look inside a A2/3/4000 keyboard and use a multmeter, inside the kevboard, the lead is connected to a 4-pin connector, simply measure what pins go where and have a look at the pinouts to figure out these 4:
+5vdc
GND
KbdData
KbdClock

Whatever color that's left over is shield ground, probably black, and slightly thicker than the others.

As for the CDTV keyboard connector, it's not a regular 6-pin mini-DIN, but some oddball 5-pin mini-DIN. So you will have to remove the excess pin on the connector (e.g. use a needle nose plier and twist it off). And, IIRC, the plastic tab in the connector will also need to be removed.

Oh, btw, if you happen to find a scrapped A2/3/4000 keyboard (with working cable, test with multimeter) then simply use this cable and wire an adapter looking at the aminet pinouts.

Hope this wasn't too confusing,
-Paul
 

Offline jimbob

Re: CDTV Keyboard
« Reply #2 on: January 03, 2004, 08:56:17 PM »
That makes perfect sense! Thanks.

I know the CDTV connector is a 5-pin mini DIN, but I don't think it'll be going back on a CDTV at anytime soon as I'm trying to get it working with my towered A1200 through an Eyetech keyboard adapter.

I think I've managed to work out which coloured wire does what   though:

Red: GND
Orange: KBD CLK
Yellow: KBD DAT
White: +5V

Thanks again for your help.
A1000, A500, A500+ with A501+ and A570, CDTV, A1200 030@50MHz Tower