NetBSD/hp300: 98561-61604 DCA Serial Cable for System Interface Boards

The DB9 connector on the System Interface Boards is not a normal 9 pin serial port. HP had a special cable to connect with normal DB25 serial cables (part number 98561-61604). This is a dca device. Use /dev/tty0.

You can use a normal non-null cable if you're willing to sacrifice hardware handshaking.

Pinout description

DB9M Pin #	DB25F Pin #	DB25F Pin # (for normal 9<->25 cables)	Signal Name
1	20	8	DCD
2	2	3	RxD
3	3	2	TxD
4	4	20	DTR
5	5	7	Signal GND
6	6	6	DSR
7	7	4	RTS
8	8	5	CTS
9	22	22	RI
GND	1	1	Protective GND

Back to NetBSD/hp300 Port Page