55
Connector J3
PS/2 Mouse Connector
Pin
1
2
3
4
5
6
Function
Mouse Data
Reserved
Ground
+5V
Mouse Clock
Reserved
J4 (COM1) and J5 (COM2)
COM 1 and COM 2 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)
Appendix E
Connector Pin Assignments
Connector J6
Floppy Disk Drive Connector
Pin
1
2
3
4
5
6
7
8
9
10
11
Function
Ground
DENSEL
Ground
Reserved
Ground
Drate0
Ground
Index
Ground
MTR0
Ground
Pin
12
13
14
15
16
17
18
19
20
21
22
Function
DR1
Ground
DR0
Ground
MTR1
Drate1
Dir
Ground
Step
Ground
Write Data