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 d84736e2 for ; Tue, 1 Oct 2019 02:30:13 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 5581A9BBF8; Tue, 1 Oct 2019 12:30:12 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 6BB7A947D6; Tue, 1 Oct 2019 12:29:42 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id C5C0A947D6; Tue, 1 Oct 2019 12:29:39 +1000 (AEST) Received: from mercury.lcs.mit.edu (mercury.lcs.mit.edu [18.26.0.122]) by minnie.tuhs.org (Postfix) with ESMTPS id 5DE09946BD for ; Tue, 1 Oct 2019 12:29:39 +1000 (AEST) Received: by mercury.lcs.mit.edu (Postfix, from userid 11178) id 5E6F318C08E; Mon, 30 Sep 2019 22:29:38 -0400 (EDT) To: tuhs@tuhs.org Message-Id: <20191001022938.5E6F318C08E@mercury.lcs.mit.edu> Date: Mon, 30 Sep 2019 22:29:38 -0400 (EDT) From: jnc@mercury.lcs.mit.edu (Noel Chiappa) Subject: Re: [TUHS] understand earliest hardware? 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: Jeremy C. Reed > "PDP-11 that had PDP-10 memory management, KS-1." ... What is this > PDP-11 and KS-1? Maybe this is the PDP-11/20 with KS-11? Yes. The reference to "PDP-10 memory management" is because apparently the KS11 did what the PDP-10 MMU did, i.e. divide the address space into two sections. (On the -10, one was for code, and one for data.) Alas, next to nothing is known of the KS11, although I've looked. There's a mention of it in "Odd Comments and Strange Doings in Unix": https://www.bell-labs.com/usr/dmr/www/odd.html but it doesn't say much. Noel