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=-1.0 required=5.0 tests=MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 29908 invoked from network); 10 Aug 2020 12:54:18 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 10 Aug 2020 12:54:18 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id BCA3F9B6D3; Mon, 10 Aug 2020 22:54:13 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id F23939B615; Mon, 10 Aug 2020 22:53:27 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 62CEE9B5D6; Mon, 10 Aug 2020 22:53:24 +1000 (AEST) Received: from mercury.lcs.mit.edu (mercury.lcs.mit.edu [18.26.0.122]) by minnie.tuhs.org (Postfix) with ESMTPS id D7E419B5C7 for ; Mon, 10 Aug 2020 22:53:23 +1000 (AEST) Received: by mercury.lcs.mit.edu (Postfix, from userid 11178) id D85FD18C082; Mon, 10 Aug 2020 08:53:22 -0400 (EDT) To: tuhs@tuhs.org Message-Id: <20200810125322.D85FD18C082@mercury.lcs.mit.edu> Date: Mon, 10 Aug 2020 08:53:22 -0400 (EDT) From: jnc@mercury.lcs.mit.edu (Noel Chiappa) Subject: Re: [TUHS] BTL summer employees 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: , Cc: jnc@mercury.lcs.mit.edu Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" > From: Lars Brinkhoff > the Dover printer spooler was written using Snyder's C compiler I'm not sure if that's correct. I don't remember with crystal clarity all the details of how we got files to the Dover, but here's what I recall (take with 1/2 a grain of salt, my memory may have dropped some bits). To start with, there were different paths from the CHAOS and TCP/IP worlds. IIRC, there was a spooler on the Alto which ran the Dover, and the two worlds had separate paths to get to it. >From the CHAOS world, there was a protocol translation which ran on whatever machine had the AI Lab's 3Mbit Ethernet interface - probably MIT-AI's CHAOS-11? If you look at the Macro-11 code from that, you should see it - IIRC it translated (on the fly) from CHAOS to EFTP, the PUP prototocol which the spooler ran 'natively'. >From the IP world, IIRC, Dave Clark had adapted his Alto TCP/IP stack (written in BCPL) to run in the spooler alongside the PUP software; it included a TFTP server, and people ran TFTP from TCP/IP machines to talk to it. (IP access to the 3Mbit Ethernet was via another UNIBUS Ethernet interface which was plugged into an IP router which I had written. The initial revision was in Macro-11; a massive kludge which used hairy macrology to produce N^2 discrete code paths, one for every pair of interfaces on the machine. Later that was junked, and replaced with the 'C Gateway' code.) I can, if people are interested, look on the MIT-CSR machine dump I have to see how it (a TCP/IP machine) printed on the Dover, to confirm that it used TFTP. I don't recall a role for any PDP-10 C code, though. I don't think there was a spooler anywhere except on the Dover's Alto. Where did that bit about the PDP-10 spooler in C come from, may I enquire? Was it a CMU thing, or something like that? Noel