User port

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Userport.jpg

The user port is a .156" edge connector at the right-hand side of the rear of the VIC-20. It provides access to a number of lines of VIA #1 giving the ability to easily interface to various forms of input and output device.

Uses

The following devices connect to the user port:


Pinout

Pinouts - user port.png

Pin Connection Use Pin Connection Use
1 GND A GND
2 +5V B CB1 RS-232 Rx data
3 RESET C PB0 RS-232 Rx data
4 PA2 Joy up D PB1 RS-232 RTS
5 PA3 Joy down E PB2 RS-232 DTR
6 PA4 Joy left, Paddle X fire F PB3 RS-232 RI
7 PA5 Joy fire, light pen H PB4 RS-232 DCD
8 PA6 Cassette switch J PB5
9 PA7 Serial ATN out K PB6 RS-232 CTS
10 9V AC L PB7 RS-232 DSR
11 9V AC M CB2 RS-232 Tx data
12 GND N GND