This page has everything you are looking for and more...
http://www.cs.cmu.edu/~dsladic/vice/doc/serial.txt
Hope it helps!
Aaron
On Thu, 16 Sep 1999, Charles Oblender wrote:
> After searching all over the internet for this I've found the pin out
> for the C64 serial port. The goal of finding this information: to
> connect serial port of the C64 to the RS232 serial port on my computer.
> Here's what I found.
>
> Pin, description
> 1, ?
> 2, GND
> 3, ATN
> 4, CLK
> 5, DATA
> 6, RESET
>
> The description that I found didn't list pin 1 for anything could this
> possibly be +5V? If so I could connect this to CTS (I'm trying to keep
> to the standard). ATN is probably attention which tells what device the
> computer is going to talk to. CLK is probably a clock signal which
> could be connected to Receive Clock. Could ATN be connected to DCD on
> the PC? Also what are the logic levels on the C64 port is it inverted
> compared to RS232 when it comes to 1 and 0 and what is the voltage on
> pin five for 1 and 0.
>
>
>
>
>
> Charles
>
Received on Thu Sep 16 1999 - 23:22:28 BST