On 22/11/2015 3:37 PM, Ed Vance wrote:
> 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.
>

Yep, pin 1 is GND (Vss) and pin 20 is +5V (Vcc).

> 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.
>

The custom chip description in the PRG also has the pinouts in chapter 7
(Appendices).

In PDF format here:

http://tinyurl.com/qc5dghw

And the whole PRG:

http://tinyurl.com/5oz5zd

--- SoupGate-Win32 v1.05