Subject: Re: uhh. I still can't find a pinout
To: Hugo Villeneuve <harpagon@jwales.EINTR.net>
From: Michael Kukat <michael@bsdfans.org>
List: port-vax
Date: 10/29/2002 15:51:18
Hi !

On Tue, 29 Oct 2002, Hugo Villeneuve wrote:
> > mmj                          Corresponding 25 pin RS-232 pins
> > 1 DTR                                  20
> > 2 TD (+)                                2
> > 3 TD (-)                                7
> > 4 RD (-)                                7
> > 5 RD (+)                                3
> > 6 DSR                                   6
>
> I disagree.
>
> 6 should go to both pin 6 and 8.

I agree with this with some examples:

Forerunner ES-3810 (maybe other console ports of network equipment)
PowerMac 7200 in OpenFirmware (maybe all PowerMacs)
All RS/6000s i know

They all need the DCD signal, and since a while, i never make adapters without
wirind DCD also. Too much pain otherwise, the adapter works with some hardware,
abd with some different hardware, you are hunting the problem quite long, if
you forget that you didn't connect DCD.

> If you do your adaptors right the first time, you'll simplify your
> life later.

Yes, 100% agreed.

...Michael

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