Texas Instruments TravelMate 4000M User Reference Manual page 266

Connector Pin Assignments
15-Pin Micro MIDI/Joy
Connector
Pin Number
1, 8, 9, 15
2
3
4, 5, 12
6
7
10
11
13
14
9-Pin Serial Port
Connector
Pin Signal Name
1 Carrier Detect
2 Receive Data
3 Transmit Data
4 Data Terminal Ready
5 Ground
6 Data Set Ready
7 Request to Send
8 Clear to Send
9 Ring Indicator
Signal Name
VCC
DC4
TMRD
GND
TMRC
D5
D6
TMRB
TMRA
D7
Abbreviation
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
Connector Pin Assignments G-3