Re: PLA equations

From: Anders Carlsson (
Date: 2003-06-10 08:13:51

On Tue, 10 Jun 2003, Raymond C. Bryan wrote:

> The 82 s100 like the 906114 has 28 pins (same size as SID and worst
> of all SId and PLA swap places between rev a and b boards so someone
> might by accident fry a PLA by putting it in a SID socket).

Ahem. So maybe the repairman who claimed to have replaced my SID actually
did so (I compared the motherboard with a circuit diagram from a magazine,
and according to that one, the replaced chip was the PLA next to the SID).
Since that particular C64 is dead, maybe I should open it and check the
chip numbers to identify what chip actually was changed.

(but the problem, a "buzzing" sound, was not within the computer but a
 faulty power supply which the shop personal kindly informed me about
 after paying for the unneccessary repair job ;-)

Anders Carlsson

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