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=-1.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HTML_FONT_LOW_CONTRAST,HTML_IMAGE_ONLY_32,HTML_MESSAGE, MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 16272 invoked from network); 17 Sep 2021 16:15:43 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 17 Sep 2021 16:15:43 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 0243C9CAB3; Sat, 18 Sep 2021 02:15:41 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id A50719CAB4; Sat, 18 Sep 2021 02:15:24 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=pass (1024-bit key; unprotected) header.d=ccc.com header.i=@ccc.com header.b="rQXSMXGu"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id DAC5B9CAB4; Sat, 18 Sep 2021 02:15:22 +1000 (AEST) Received: from mail-ot1-f46.google.com (mail-ot1-f46.google.com [209.85.210.46]) by minnie.tuhs.org (Postfix) with ESMTPS id 4612C9CAB2 for ; Sat, 18 Sep 2021 02:15:22 +1000 (AEST) Received: by mail-ot1-f46.google.com with SMTP id y63-20020a9d22c5000000b005453f95356cso6612226ota.11 for ; Fri, 17 Sep 2021 09:15:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ccc.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=x3IS/misH7T6pOaotXClfNVEunyOVFWosXKK5GtBZ80=; b=rQXSMXGuodBklrJbRnij2v9Ip97XhlxrbTmeBoJot15w2gMJ5QZ+i7yIa+kkzglItr UA0IhM0wya4fNjbCNPE7t0dCc3URhTDfc8BhfAWM07JkPKCa/wfwe/ki7M6ZoNsALfYF VLvJlCPSpW0OrC1EbMmLf+hlqY3pf/hVRtJZ0= 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; bh=x3IS/misH7T6pOaotXClfNVEunyOVFWosXKK5GtBZ80=; b=Lu/8S9GCXBZQdyEXjHgxYa6xsspm/H+n1DRanIGZYlJ8FnATBS3KR6zCE4Tho8b8Hy v2jT8pn/OIZXx+MWAh5fCrbB91mPddeLBwll6xsMPQl+hDwrOFfaUK+oW9gR33KsTbpG uCfcUVPqjKyNkdYPRlVTBVWVKzlIN1+ts9pPXsv4AyP9xSKvtUZqGAnrksOleMyJaXFw Os+7TkTL1Vihu0/5j449uXp6CkqBVYF31vu224s27wpYp6ENou4Eeb2eMJNN+ij/kvDF M8kjBQQlb+gaZVPnANRB1dbH0UU6jQjZ/fK0E/vtRFEBOazTKge1cMXUxQ6rLj5DuEN7 w4xQ== X-Gm-Message-State: AOAM532PuoMTtARpiGtWPJI0AnhNdgF+UMdDMwnqvP/dDMWAUjHX+KTI hl0RrCm2bcH/Jy3lt6+zFRkGYbS+9Z5jxZZT0h/NQAAVK8k= X-Google-Smtp-Source: ABdhPJwMed2Y+TRl2mOcpwWi9kQg6hSsbpdoCt61v6kvAAX0ifblmfWpFEKGroM+Y21u02NeDpD9mGzoiLIaq/SuRIw= X-Received: by 2002:a9d:4a8d:: with SMTP id i13mr10418896otf.180.1631895321240; Fri, 17 Sep 2021 09:15:21 -0700 (PDT) MIME-Version: 1.0 References: <2007825471.713023.1631887763341.ref@mail.yahoo.com> <2007825471.713023.1631887763341@mail.yahoo.com> <1359803079.736350.1631894652157@mail.yahoo.com> In-Reply-To: <1359803079.736350.1631894652157@mail.yahoo.com> From: Clem Cole Date: Fri, 17 Sep 2021 12:14:54 -0400 Message-ID: To: Roland , TUHS main list Content-Type: multipart/alternative; boundary="000000000000eef9f105cc333cbe" Subject: Re: [TUHS] Unix for PDP11/20 w/o mmu or paging option 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" --000000000000eef9f105cc333cbe Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, Sep 17, 2021 at 12:04 PM Roland via TUHS wrote: > > There is a KT11B paging option that makes the PDP11/20 a 18 bit machine. > It looks a bit like the TC11 DECtape controller. I've got the schematics > from the internet. But I have no idea how it compares to the later MMU > units from the software perspective. > Love to see them and if you know where you found them. > The V1 work was for a PDP-7 and is before the first 11/20 was secured. > The point is that I think there is a hole in the the SW we have. > I just looked again at what Warren has -- it is the 11/20 assembler code that Dennis scanned. I have forgotten that we still had that. I wonder if it had the KS-11 stuff in it. I'll have to peek =E1=90=A7 --000000000000eef9f105cc333cbe Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Fri, Sep 17, 2021 at 12:0= 4 PM Roland via TUHS <tuhs@minni= e.tuhs.org> wrote:

There is a KT11B paging option that makes the PDP11/20 a 18 bit machine. It=20 looks a bit like the TC11 DECtape controller. I've got the schematics= =20 from the internet. But I have no idea how it compares to the later MMU=20 units from the software perspective.
Love to see them and= if you know where you found them.=C2=A0
=C2=A0
The V1 work was for a PDP-7 and is before the first=C2=A011/20 was secured.=C2= =A0 The point is that I think there is a hole in the the=C2=A0SW we have.
I just looked again at what Warren has -- it is the 11/20 assembler co= de that Dennis scanned.=C2=A0 I have forgotten that we still had that.=C2= =A0 =C2=A0I wonder if it had the KS-11 stuff in it.=C2=A0=C2=A0 I'll have to peek=C2=A0=C2=A0
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=E1=90=A7
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