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Page 18-19APPENDIX
Output Port
13121110987654321
252423222120191817161514
1 = Chassis Ground
2 = TXD → (Transmit Data)
3 = RXD ← (Receive Data)
4 = RTS ← (Ready To Send)
5 = CTS → (Clear To Send)
6 = DSR ← (Data Set Ready)
7 = Signal Ground
8 = DCD ← (Data Carrier Detect)
20 = DTR → (Data Terminal Ready)
Serial Pin-Outs
9 = Data 1
10 = Data 2
12 = Printer Error (+)
13 = Data 3
14 = Data 4
Parallel Pin-Outs
15 = Select (+)
16 = Data 5
17 = Fault (-)
18 = Data 6
19 = Acknowledge (-)
21 = Data 7
22 = Data 8
23 = Strobe (-)
24 = Init (-)
25 = Busy (+)