Parallel Port; Figure 3-4: Com Port Locations; Table 3-3: Internal Com Port Connector Pinouts - IBM 3301690 User Manual

3301690 CPU Card
PIN DESCRIPTION
1 DATA CARRIER DETECT (DCD)
2 RECEIVE DATA (RXD)
3 TRANSMIT DATA (TXD)
4 DATA TERMINAL READY (DTR)
5 GND (GND)

Table 3-3: Internal COM Port Connector Pinouts

Figure 3-4: COM Port Locations

3.2.4 Parallel Port

CN Label:
CN Type:
36
LPT1
2x13 pin header
6 DATA SET READY (DSR)
7 REQUEST TO SEND (RTS)
8 CLEAR TO SEND (CTS)
9 RING INDICATOR (RI)
10 GND (GND)