Half-duplex VT420?

From: Zach Malone <Diff_at_Mac.com>
Date: Mon Oct 8 21:18:55 2001

The HP 9000/380 machines uses a 9 pin RS-232 cable for console access, make
certain you are not connecting to parallel. I have one of them, it has to
be one of the sturdiest desktop machines I own.
    Zach
----- Original Message -----
From: "Dave McGuire" <mcguire_at_neurotica.com>
To: <classiccmp_at_classiccmp.org>
Sent: Monday, October 08, 2001 9:29 PM
Subject: Re: Half-duplex VT420?


> On October 9, Iggy Drougge wrote:
> > Since I'll be running another headless computer (HP 9000/380), I brought
home
> > my VT420. Nice terminal, but unfortunately this specimen will only talk,
not
> > listen.
> > At first, I suspected my HP had lost its settings (the stupid boot PROM
must
> > be set via the keyboard to use a serial console). I proceeded to bring
my HIL
> > keyboard home and set it (without any screen) to use a "remote" console
again,
> > and the machine seemed to acknowledge that, beeping happily. But no
response
> > from the terminal. So I tested it with my DECstation. No response there
> > either. So I hooked it up to my Amiga. Typing at the keyboard, there was
> > output in NComm, but doing the opposite didn't work at all.
> > So we have only one-way communication. What could be the problem?
>
> Is flow control enabled on the terminal? I assume you're using a
> DB25 adapter at the other end of an MMJ cable. Try turning off flow
> control in the communications setup menu and shorting pins 2-3 on the
> connector. At that point the terminal should echo what you type back
> to the display. If it doesn't, you might have a toasty RS232 line
> receiver in your terminal.
>
> -Dave
>
> --
> Dave McGuire
> Laurel, MD
Received on Mon Oct 08 2001 - 21:18:55 BST