On 23-Mar-2000 Tony Duell wrote:
>>
>> Quite, I've got to say this is an EXTREMELY BAD way of resetting a C64
>> in my
>> experience.
>
> Yes, but I would have thought that the main problem is that you're
> effectively shorting an output (namely the output of the chip that
> normally generates the reset signal) to ground. This is not generally a
> good idea.
>
> I am suprised it was the processor that failed, though. AFAIK, the
> processor in a C64 never outputs anything to the reset line.
>
> There's a fairly easy modification IIRC that adds a reset switch in
> parallel with a capacitor in the reset circuit. This is a safe way to do
> it. It's fairly obvious how to do this given a C64 schematic. If anyone
> is seriously interested, I'll see what I can find.
>
> -tony
http://www.funet.fi/pub/cbm/documents/projects/other/reset-for-64.txt
claims it's pin 8 of U20, a 556 timer IC. I think adding a cap would be
useful for debouncing.
BTW, where would one find a connector for the user port on a C-64?
-Philip
Received on Wed Mar 22 2000 - 19:44:50 GMT