From owner-freebsd-alpha Wed Jan 16 12:16:38 2002 Delivered-To: freebsd-alpha@freebsd.org Received: from falcon.prod.itd.earthlink.net (falcon.mail.pas.earthlink.net [207.217.120.74]) by hub.freebsd.org (Postfix) with ESMTP id 1256A37B416 for ; Wed, 16 Jan 2002 12:16:35 -0800 (PST) Received: from pool0454.cvx21-bradley.dialup.earthlink.net ([209.179.193.199] helo=mindspring.com) by falcon.prod.itd.earthlink.net with esmtp (Exim 3.33 #1) id 16QwTi-0007BJ-00; Wed, 16 Jan 2002 12:16:10 -0800 Message-ID: <3C45DF84.5990A4E4@mindspring.com> Date: Wed, 16 Jan 2002 12:16:04 -0800 From: Terry Lambert X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Trevor Johnson Cc: Riccardo.Veraldi@fi.infn.it, freebsd-alpha@FreeBSD.ORG Subject: Re: DEC3000/300 References: <20020116023458.E17814-100000@blues.jpj.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Trevor Johnson wrote: > > I just got a DEC3000/300 > > to use the seial console do I have to get a NULL modem or modem serial > > cable? > > I made a quick-and-dirty null modem cable to attach to a PC: > > DB25F DB9F > (DEC 3000) (PC) > 2 ----------- 2 > 3 ----------- 3 > 6 ----------- 6, 8 > 7 ----------- 5 This isn't a NULL-modem cable (2&3 aren't swapped), it's just "a cable with pin 8 hooked to pin 6 on one side for some reason". A real NULL-modem cable looks like: TX -------- RX RX -------- TX CTS -------- RTS RTS -------- CTS GND -------- GND (signal ground, not chassis ground) DCD -------- DTR DTR -------- DCD GND -------- (chassis ground on one end to all other wires) -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message