Path: utzoo!utgpu!water!watmath!clyde!att!twitch!anuck!maddog
From: maddog@anuck.UUCP (j.j.tupper)
Newsgroups: comp.sys.hp
Subject: Re: Serial Port ?
Message-ID: <1313@anuck.UUCP>
Date: 20 Oct 88 20:47:52 GMT
References: <1135@helios.ee.lbl.gov> <4310015@hpindda.HP.COM>
Reply-To: maddog@anuck.UUCP (j.j.tupper)
Organization: ATT Bell Labs, Andover, MA
Lines: 27

In article <4310015@hpindda.HP.COM> kmont@hpindda.HP.COM (Kevin Montgomery) writes:
>> I decided to do something useful with the RS-232-type port
>> on an HP-9000/3xx, & attach an old 2623a terminal to it.  
>> Unfortunately...I can't quite get it to go.  I can cat files
>> to the terminal, & sometimes a login: prompt is issued,
>> but I can't login or proceed any further.

There are two ways you can setup a 232 device on a series 300. The first
way implements all the modem nonsense (DTR and RTS etc.), the second ignores
everything but send and receive. The difference is in the minor device number.

The minor device number is made up of three two digit hex numbers. For
instance: 0x0f0104

	0x0f - the select code of the interface card
	01   - the line number of interest on that interface card (used for
		cards that support more than one line)
	04   - The third number is 0 if you want all the modem stuff, and 4
		if you just want send and receive.

Check your minor device number (ls -l) and make sure it ends in 4. If not,
run mknod again.

	mknod tty09 c 1 0x090000    # modem version
	mknod tty09 c 1 0x090004    # non-modem version
-----------------------------------------------------------
maddog@mvuxi.att.com