RE: usb keyboard for commodore C116

From: didier derny <>
Date: Sat, 8 Nov 2014 16:34:50 +0100
Message-ID: <000001cffb69$890ef370$9b2cda50$@org>
There is no problem with the electronics,

The TED and the PLA and 6529 are working perfectly

If I repair the keyboard it will works for some time
The will some keys will be dead again

Now I give up, I buy or build a replacement

I've seen the CKEY but no support for C116  [I have one for my sx64]
And it's PS/2 not usb

I'm also thinking to make a version for a non commodore machine
Using also a 8x8 matrix, and similar connector


-----Message d'origine-----
De :
[] De la part de Gerrit Heitsch
Envoyé : samedi 8 novembre 2014 16:20
À :
Objet : Re: usb keyboard for commodore C116

On 11/08/2014 02:56 PM, didier derny wrote:
> I have a commodore 116 but the keyboard, is always non functioning

The question is, is it the keyboard that is dead or is it a hardware fault
of the system?

The keyboard in the C116 is handled by the little 6529B next to the
modulator and TED (the largest IC). Also involved is the PLA (251641-02)
which generates the _CS signal for the 6529B.

If it's the keyboard, then it can be reworked (not fun but possible). If
it's one of the ICs I mentioned, the keyboard adapter mentioned by someone
else won't help you.

Do you have another 264 system where you could test TED and the PLA?

Do you have a scope where you could take a look at the output pins of the
6529B? Those are Pins 2 - 9.


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Received on 2014-11-08 16:01:35

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