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If you want to build your own RS-232 cable, follow the pinout shown in the
following figure:
Serial Cable Pinout
Pin
Signal
Signal Description
Number
1
DCD
Data Carrier Detect (not used)
2
TD
Transmit Data (data coming from HP processor probe)
3
RD
Receive Data (data going to HP processor probe)
4
DTR
Data Terminal Ready (not used)
5
GND
Signal Ground
6
DSR
Data Set Ready (Output from HP processor probe)
7
RTS
Request to Send (Input to HP processor probe)
8
CTS
Clear to Send (connected to pin 6)
9
RING
Ring Indicator (not used)
Connecting to the Host Computer
To connect a serial cable
23
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