Apple III Serial Port: Cable pinouts for Okidata 82A and 83A

Apple III Serial Port: Cable pinouts for Okidata 82A and 83A

Apple III Serial Port            Cable       Printer Connector
 
Frame Ground ............(FG)...... 1  <----->  1.....(FG)
Transmit Data            (Tx) ..... 2  <----->  3.....(Rx)
Receive Data             (Rx) ..... 3
Request to send          (RTS) .... 4
Clear To Send            (CTS) .... 5
Data Set Ready           (DSR) .... 6  <-----> 11
Signal Ground ...........(SG)...... 7  <----->  7.....(SG)
Data Carrier Detect      (DCD) .... 8
Secondary Clear To Send  (SCTS) ... 19
Data Terminal Ready      (DTR) .... 20
 
NOTE: Printer dip switches need to be set as shown;
 
FRONT     1 - OPEN             BACK     1 - CLOSED
          2 - OPEN                      2 - CLOSED
          3 - OPEN                      3 - OPEN
          4 - OPEN                      4 - CLOSED
          5 - CLOSED                    5 - OPEN
          6 - OPEN                      6 - CLOSED
          7 - OPEN
          8 - CLOSED
 
NOTE: Jumper blocks should be in position A.

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