PCI/ISA System Board
Pin
17
18
19
20
21
22
23
24
25
Function
-Slctin
Ground
Ground
Ground
Ground
Ground
Ground
PNF
Ground
Connectors CN8 and CN7
Primary (COM-A) and Secondary (COM-B) Serial Ports
Pin
1
2
3
4
5
6
7
8
9
Function
DCD (Data Carrier Detect)
RX (Receive Data)
TX (Transmit Data)
DTR (Data Terminal Ready)
Ground (Signal Ground)
DSR (Data Set Ready)
RTS (Request to Send)
CTS (Clear to Send)
RI (Ring Indicator)
F-8
u
Appendix F