11-21-15 12:23 Terry Raymond wrote to All about C64/C-128 MOS chip pin in
Howdy! Terry,

 TR> @MSGID: 
 TR> Hi where could I find all C64/ C-128 MOS chip pin info mainly I need to
 TR> know with each chip where Ground pin is?

-snip-

In the "The Anatomy Of the Commodore 64" book by Abacus Software,
I found this information, Hope it helps.

I.C.      GND Pin
6510 CPU  21
6581 SID  14
6567 VIC  20

The book says Pin 1 of the 6526 CIA is mass, that may be the GND Pin
since all other pins of that I.C. are signal lines.

The Expansion Port has GND at Pins 1, 22, A and Z .

The User Port has GND at Pins 1,12, A and N .

I couldn't find the schematic of the C=64 in the back of my copy of
the Commodore 64 Programmers Manual or I would had used that instead
of the Anatomy book.

Jameco in the past has had parts for the C=64, look them up - jameco.com


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