From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,HTML_MESSAGE,MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 19193 invoked from network); 27 Nov 2022 20:47:31 -0000 Received: from minnie.tuhs.org (50.116.15.146) by inbox.vuxu.org with ESMTPUTF8; 27 Nov 2022 20:47:31 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 64A3D41B7F; Mon, 28 Nov 2022 06:47:07 +1000 (AEST) Received: from mail-ua1-f53.google.com (mail-ua1-f53.google.com [209.85.222.53]) by minnie.tuhs.org (Postfix) with ESMTPS id 73D5841B77 for ; Mon, 28 Nov 2022 06:47:01 +1000 (AEST) Received: by mail-ua1-f53.google.com with SMTP id a19so3214484uan.2 for ; Sun, 27 Nov 2022 12:47:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=jBVfYLKSIyY8pokJynXt23Kp8X/lQEn7fERjttAp7p8=; b=TbnElZSSaS+aPEiD8KVrM8AX2iif4YtSJ4sfrwRaSKp1EFZJpVe55jC5K4Dw9tvq9X 4ZccwOSO95n0HHc8mp0DxVvK/87SY1gwngsWmHeny8kjfryoRcKdpxyFbfxFzjaRUT6Y xzNg3UZNg7hrqF2LoOINiyNLm1CL9/J2Vz6RR/G2evd+lnMj5Vu3TS+7gw3jGglFq5Mp iuheHRSf9eQw8tcLcLKBp9yGcMk8BaoPOzF5DGe62zjLUicGeiqlpFSEIlNCUvYgMN7P /pYJATdbGdRe8lN+/j0jT1BC7tawrQTwvpV7pOOO11HNM02JlDVv+Ts8bhsdcaDAc+be xLeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=jBVfYLKSIyY8pokJynXt23Kp8X/lQEn7fERjttAp7p8=; b=QFtQZSr+XcE/Y35cZa2S1RB6HgGYCvJoXekKzTyD00ldxvwJuRXaDjFx2zCjF9yLLv kcyC5NRUWrMsgtjIbEN8QTxDiBxv13AZMYcEYPcyxF+0gXCUBqHsTJ04/tfr9lfunCAr BOk/JhFrDO5Z/r9n5YEZlZSzS/5gWSrALYZYezRpCVbBgGI/Sro0bQubjKVh4vzg85JX Ko1HcwD3HHdxs4vJXz4ZaFi4cu2U2CvWRTPCJvNKEbTjxCS67Abv0VCdkjOja8XVzoYl spus8PJHN+q4dyZgmoqodaMCfXvDCxIiv+qMKkAY8pcIig5YE9ExV/h4oe/KZBlZHnPD G9Ww== X-Gm-Message-State: ANoB5plrqVboKm6dL7Pl9gVGqs0s/y0UJ12gATPpWwg29AQOg/tToZnq byUXd/+95MphubnsPwA4DGPRtexjnZyyImVK2wgnH7vo X-Google-Smtp-Source: AA0mqf6xZ+NDETJfCRm2PvqZAUN7sHLzQZ4OKm47g1Gh/o07NM+bSV+PV3R8B6bJB+AtK+63Zshqric+LKi938pGlCQ= X-Received: by 2002:ab0:7014:0:b0:418:8cd0:6715 with SMTP id k20-20020ab07014000000b004188cd06715mr21694406ual.7.1669581960327; Sun, 27 Nov 2022 12:46:00 -0800 (PST) MIME-Version: 1.0 References: <8f278bf8-de57-4e77-a3b8-d007d7c3a446@app.fastmail.com> <20221126191827.GV18011@mcvoy.com> <764dda08-f358-4c74-8056-ef8fc80bcaac@app.fastmail.com> <20221126232323.GX18011@mcvoy.com> <20221127001714.GY18011@mcvoy.com> <202211270443.2AR4hofO067295@ultimate.com> <202211271859.2ARIxKqL016933@freefriends.org> In-Reply-To: <202211271859.2ARIxKqL016933@freefriends.org> From: Rob Pike Date: Mon, 28 Nov 2022 07:45:49 +1100 Message-ID: To: arnold@skeeve.com Content-Type: multipart/alternative; boundary="000000000000ab37bc05ee79d7be" Message-ID-Hash: CWAQ32J6ROVVNWBPIEGMO24SMRPCP7K4 X-Message-ID-Hash: CWAQ32J6ROVVNWBPIEGMO24SMRPCP7K4 X-MailFrom: robpike@gmail.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-tuhs.tuhs.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: tuhs@tuhs.org X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: Reaction to the 3B2 at Bell Labs List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: --000000000000ab37bc05ee79d7be Content-Type: text/plain; charset="UTF-8" But to shut down the dual 3B20 used in switching, you pulled long copper rod, about 3cm in diameter, from a receptacle between the two machines. It was attached with a braided conductor to the frame. And then you slid the rod into another receptacle to short out the power supply for certain. -rob On Mon, Nov 28, 2022 at 5:59 AM wrote: > Georgia Tech got two 3B20s. They did very little more than consume > electricity and look impressive. I wanted to port 4.2BSD to them, > but that never got off the ground. > > "Ron Natalie" wrote: > > > > > >. But everyone knew what the J stood for. The 3B2 served as a doorstop. > > > > Shades of the jerq terminal. The J prefix persiste in the code long > > after the nickname was quashed. > > > > > > Being in charge of the Rutgers computer center, we were gifted a lot of > > ATT hardware. We had one 3B20 (now that was a pure piece of phone > > equipment, you shut it down by turning a switch inside and holding the > > button down until it twanged. Just like putting an old 303 modem into > > loop back). We also got three 3B5's (noted for the one installed in > > the New Brunswick computing room that got completely drenched when a > > pipe burst and kept on running) and countless of the 3B2s. I chortled > > in that unless you were logged in as root, you couldn't work the power > > switch. Yanking the cord out of the wall was still and option. > --000000000000ab37bc05ee79d7be Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
But to shut down the dual 3B20 used in switching, you pulled long= copper rod, about 3cm in diameter, from a receptacle between the two machi= nes. It was attached with a braided conductor to the frame. And then you sl= id the rod into another receptacle to short out the power supply for certai= n.

-rob


On Mon, Nov 28, 2022 at 5:59 AM <arnold@skeeve.com> wrote:
Georgia Tech got two 3B20s.=C2=A0 They did= very little more than consume
electricity and look impressive.=C2=A0 I wanted to port 4.2BSD to them,
but that never got off the ground.

"Ron Natalie" <ron@ronnatalie.com> wrote:

>
> >. But everyone knew what the J stood for. The 3B2 served as a door= stop.
>
> Shades of the jerq terminal.=C2=A0 =C2=A0 The J prefix persiste in the= code long
> after the nickname was quashed.
>
>
> Being in charge of the Rutgers computer center, we were gifted a lot o= f
> ATT hardware.=C2=A0 =C2=A0We had one 3B20 (now that was a pure piece o= f phone
> equipment, you shut it down by turning a switch inside and holding the=
> button down until it twanged.=C2=A0 =C2=A0Just like putting an old 303= modem into
> loop back).=C2=A0 =C2=A0We also got three 3B5's (noted for the one= installed in
> the New Brunswick computing room that got completely drenched when a <= br> > pipe burst and kept on running) and countless of the 3B2s.=C2=A0 =C2= =A0 I chortled
> in that unless you were logged in as root, you couldn't work the p= ower
> switch.=C2=A0 =C2=A0 Yanking the cord out of the wall was still and op= tion.
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