LSI Logic's Evaluation boards require only pins 2, 3, and 5 to be connected (except CON7 on the SDP1000).
HOST LSI EVAL BOARD
==================== ==============
DB25 DB9 DB9
PIN PIN PIN
RXD 2 3 --------------------<----------------- 2
TXD 3 2 -------------------->----------------- 3
GND 7 5 -------------------------------------- 5
RTS 4 7 --+
|
CTS 5 8 --+
DSR 6 6 --+
|
DCD 8 1 --+
|
DTR 20 4 --+
|