Re: usb keyboard for commodore C116

From: Gerrit Heitsch <>
Date: Sat, 08 Nov 2014 16:19:57 +0100
Message-ID: <>
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 16:00:53

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