Tandy 102 Service Manual page 79

B-2-2. RS-232C Interface
Pin No. Symbol
1 GND
2 TXR Transmit Data
3 RXR
Receive Data
4 RTS Request to send
5 CTS Clear to send
6 DSR Data set ready
7 GND
8 CD Carrier detect
9 NC
10 NC
11 NC
12 NC
13 NC
14 NC
15 NC
16 NC
17 NC
18 NC
19 NC
20 DTR
Data terminal ready
21 NC
22 NC
23 NC
24 NC
25 NC
Description
Table B-2. RS-233C Connector Pin Assignments
000000000000
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
000000000000
Figure B-3. RS-232C Connector