From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 41a2b72a for ; Thu, 23 Jan 2020 04:32:18 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 0CFD09C228; Thu, 23 Jan 2020 14:32:16 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id ABC5B9C102; Thu, 23 Jan 2020 14:31:44 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id D19109C102; Thu, 23 Jan 2020 14:31:41 +1000 (AEST) Received: from fourwinds.com (fourwinds.com [63.64.179.162]) by minnie.tuhs.org (Postfix) with ESMTPS id 75C1B9B842 for ; Thu, 23 Jan 2020 14:31:41 +1000 (AEST) Received: from darkstar.fourwinds.com (localhost [127.0.0.1]) by fourwinds.com (8.15.2/8.15.2) with ESMTPS id 00N4VYrI3655318 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT) for ; Wed, 22 Jan 2020 20:31:34 -0800 Received: from darkstar.fourwinds.com (jon@localhost) by darkstar.fourwinds.com (8.15.2/8.15.2/Submit) with ESMTP id 00N4VYfb3655315 for ; Wed, 22 Jan 2020 20:31:34 -0800 Message-Id: <202001230431.00N4VYfb3655315@darkstar.fourwinds.com> From: Jon Steinhart To: TUHS main list In-reply-to: References: <54907FF0-3700-43FC-AA46-95F43F54AEB2@planet.nl> Comments: In-reply-to George Michaelson message dated "Thu, 23 Jan 2020 13:42:29 +1000." MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-ID: <3655313.1579753894.1@darkstar.fourwinds.com> Content-Transfer-Encoding: quoted-printable Date: Wed, 22 Jan 2020 20:31:34 -0800 X-JON-SPAM: local delivery Subject: Re: [TUHS] Spider [was: Unix quix] X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" It connected to its hosts via a (discrete TTL-based) microcontroller or =E2= =80=9CTIU=E2=80=9D and seems to have been connected almost immediately to Unix systems: the oldest driver I have been able to locate is in the V4= tree (https://minnie.tuhs.org/cgi-bin/utree.pl?file=3DV4/nsys/dmr/tdir/ti= u.c). It used a DMA-based parallel interface into the PDP11. As such, it s= eems to have been much faster than the typical Datakit connection later - but I know too little about Datakit= to be sure. I have vague memories here that maybe Heinz can help with if his are any b= etter. I believe that Sandy played a part in "the loop" or "the ring" or whatever= it was called that we had connecting our Honeywell 516 to peripherals. I do remember the 74S00 repeaters because of the amount of time that Dave Welle= r spent tuning them when the error rate got high. Also, being a loop, Joe Condon used to pull his connectors out of the wall whenever people weren't showing up to a meeting on time. I don't know whether our network was a forerunner to the spider network. Jon