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=DKIM_SIGNED,DKIM_VALID, HTML_MESSAGE,MAILING_LIST_MULTI,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 10183 invoked from network); 28 Feb 2022 06:11:18 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 28 Feb 2022 06:11:18 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 9FEA39CFC3; Mon, 28 Feb 2022 16:11:17 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 9B2AA9CBCF; Mon, 28 Feb 2022 16:09:19 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=pass (2048-bit key; unprotected) header.d=bsdimp-com.20210112.gappssmtp.com header.i=@bsdimp-com.20210112.gappssmtp.com header.b="u7XwdQFj"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 509A19CBCF; Mon, 28 Feb 2022 16:09:18 +1000 (AEST) Received: from mail-vs1-f52.google.com (mail-vs1-f52.google.com [209.85.217.52]) by minnie.tuhs.org (Postfix) with ESMTPS id D427F9CBCE for ; Mon, 28 Feb 2022 16:09:14 +1000 (AEST) Received: by mail-vs1-f52.google.com with SMTP id w4so11886885vsq.1 for ; Sun, 27 Feb 2022 22:09:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20210112.gappssmtp.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=2vxWl+EwOD83EwQoVz8+cjkcAgUKZ+6PCg6KXyfiEFQ=; b=u7XwdQFjBfKL33QYdu4dzgOV8eyDcvxEYylWMtcO4Grpoggst6NUB7n8Bn43XpjjI2 XXmq8/tN+QiXYO/90PTI3S1u9dhJFd6VIlmHi24vgPClXHI3B28pXR7NCwBT1JhtlLRt AkXTWfDriadP7gE/T1WbIjdabyU7KkVtg5+Y4hI5xiiYAOYSGZPZyZQx1Np/Qu8eGsR7 oehNozm6r6z8w/SJxsqAhECgcS2ql1GWy2HrnBUYFGIlZP9CPT3Th9W9bhAg0KGurYZk 8P80TjTQGairK8ElSf6kbF3rI3noyEsMcDNTFY2dbCc/Kv3knAtC8crNImNXTFePEtYw sanw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=2vxWl+EwOD83EwQoVz8+cjkcAgUKZ+6PCg6KXyfiEFQ=; b=sYdB1noZ22f3cz9BAr1Gc2JZxsGVW+xzWej1Obcn9dp7jADIWbzu4VyHAgAVvgJY6q J90eY5+4ZM25s3lTcD2xtIi6rrPl/jqCD/PTr1S5vsUxwHi4WsRZT37yv+gwi7jd/xKS ouE3mCFW9vUfY0aOfUOXeZ7U8OVlc+Ea6IoEE7621x1KXnVSfdssYLbiDw2M4Fdxt6R5 5XRrQWqPJCsrcmC8tBW8W/EN/AKapEXznxHlkSf9wkAlAV0UKExctGkXHoGls980ZiMP mmD1rjUST+a9bLTa0q4wxbTvXVEbOUI7E4QTaHByzo1VkrCUdwRXibygC+DwI8I2+gW4 PfYg== X-Gm-Message-State: AOAM531iUggm03TThp3dtMZNyunuwTCTJ/xVCwZpC3JngWcuwqvbp8JH BKIglv2w9KgWd6VSEKXhjP2RsBjzP3mz8qoU/QbiJtCKbao= X-Google-Smtp-Source: ABdhPJwhcrU3pB0Dudx4rtnmUtM/diDzYKIMYJs6KLeJJDygdQNZgch235wjLs14dDRX8uCe/WyITtaWOkPdAmZUrXU= X-Received: by 2002:a05:6102:6c7:b0:31a:da3b:e9fe with SMTP id m7-20020a05610206c700b0031ada3be9femr6938714vsg.68.1646028553907; Sun, 27 Feb 2022 22:09:13 -0800 (PST) MIME-Version: 1.0 References: <4e3c05d2-2496-b917-f1f4-1c6cba9ef58a@gmail.com> In-Reply-To: <4e3c05d2-2496-b917-f1f4-1c6cba9ef58a@gmail.com> From: Warner Losh Date: Sun, 27 Feb 2022 23:09:02 -0700 Message-ID: To: Will Senn Content-Type: multipart/alternative; boundary="0000000000003f02b605d90de319" Subject: Re: [TUHS] Memory on Lion's v6 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: TUHS main list Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" --0000000000003f02b605d90de319 Content-Type: text/plain; charset="UTF-8" On Sun, Feb 27, 2022, 10:51 PM Will Senn wrote: > Does anybody know how much memory was configured on the PDP-11 that Lion's > used for the commentary system. Here's what the book says about the system: > > ; from lions, page 1 > ; The code selection presumes a "model" system consisting of: > ; PDP11/40 processor; > ; RK05 disk drives; > ; LP11 line printer; > ; PC11 paper tape reader/punch; > ; KL11 terminal interface. > > I usually add the mag tape, too > ; TM10 magnetic tape - not in lions, but super handy > > It seems like he must have had an MMU and 128k memory, but I don't know. > I'm hoping y'all remember, know, or can otherwise divine the correct value. > I've run with no MMU - crash on boot. I've also run with less memory, but > then cc won't build mkconf, when I have the TM10 enabled kernel loaded. As > a reminder, his book was published in 1977. > V6 required the PDP-11 MMU. There are all kinds of code that writes directly to the memory mapping registers. So Lions had to have had an MMU. I'd imagine he had at least 128k of RAM, but likely not much more since the budgets for these machines at the time in Australia was notoriously tight. Warner Thanks, > > Will > --0000000000003f02b605d90de319 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Sun, Feb 27, 2022, 10:51 PM Will Senn <will.senn@gmail.com> wrote:
=20 =20 =20
Does anybody know how much memory was configured on the PDP-11 that Lion's used for the commentary system. Here's what the book says about the system:
; from lions, page 1
; The code selection presumes a "model" system consisting o= f:
; PDP11/40 processor;
; RK05 disk drives;
; LP11 line printer;
; PC11 paper tape reader/punch;
; KL11 terminal interface.

I usually add the mag tape, too
; TM10 magnetic tape - not in lions, but super handy

It seems like he must have had an MMU and 128k memory, but I don'= t know. I'm hoping y'all remember, know, or can otherwise divin= e the correct value. I've run with no MMU - crash on boot. I've als= o run with less memory, but then cc won't build mkconf, when I have the TM10 enabled kernel loaded. As a reminder, his book was published in 1977.
<= br>
V6 required the PDP-11 MMU. There are all kinds = of code that writes directly to the memory mapping registers. So Lions had = to have had an MMU. I'd imagine he had at least 128k of RAM, but likely= not much more since the budgets for these machines at the time in Australi= a was notoriously tight.

Warner

Thanks,

Will
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