Texas Instruments 3000 - Manual (Page 173)

G
Connector Pin Assignments
RS-232C Connector
Nine-Pin RS-232C Serial Connector
Pin No. Signal Name Abbreviation Direction
1 Carrier detect CD Input
2 Receive data RD Input
3 Transmit data TD Output
4 Data terminal ready DTR Output
5 Signal ground SG
6 Data set ready DSR Input
7 Request to send RTS Output
8 Clear to send CTS Input
9 Ring indicator Pi Input
25-Pin Centronics-Type
Parallel Connector
Pin No. Signal Name Abbreviation Direction
1 Strobe STROBE- Output
2 Data 0 DATA0 Output
3 Data I DATA1 Output
4 Data 2 DATA2 Output
5 Data 3 DATA3 Output
6 Data 4 DATA4 Output
7 Data 5 DATA5 Output.
8 Data 6 DATA6 Output
9 Data 7 DATA7 Output
10 Acknowledge ACK- Input
11 Busy BUSY Input
12 Paper empty PE Input
13 Select SLCT Input
14 Auto feed AUTO FEED- Output
15 Printer error PERROR- Input
16 Initialize printer INIT- Output
17 Select input SLCT IN- Output
18-25 Ground GND
Connector Pin Assignments G- 1