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Connector pinout: C64 RS232 User Port
Commodore C64 RS232 User Port
| pin | name | direction | description | color | | A | GND | | Signal Ground | | | B+C | PB1 | | Receive Data | | | D | PB2 | | Ready To Send | | | E | PB3 | | Data Terminal Ready | | | F | PB4 | | Ring Indicator | | | H | PB5 | | Data Carrier Detect | | | K | PB6 | | Clear To Send | | | L | PB7 | | Data Set Ready | | | M | PA2 | | Transmit Data | | | N | GND | | Signal Ground | |
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