Commodore VIC-20 - Page 327

Appendix C VIC I/O Pinouts 313
Pin No.
Type
1
+6 V REG (10 rnA max)
2
GND
3
AUDIO
4 VIDEO LOW
5
VIDEO HIGH
FIGURE C-3. Video port pinout
Pin No.
Type
1 SERIAL SRQ IN
2 GND
3 SERIAL ATN IN / OUT
4
SERIAL CLK IN/OUT
5
SERIAL DATA IN/OUT
6
N/C
FIGURE c-4. Serial 110 port pinout