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_INVALID,DKIM_SIGNED, HTML_FONT_LOW_CONTRAST,HTML_IMAGE_ONLY_28,HTML_MESSAGE, HTML_OBFUSCATE_10_20,MAILING_LIST_MULTI autolearn=no autolearn_force=no version=3.4.4 Received: (qmail 3567 invoked from network); 4 Mar 2023 15:09:07 -0000 Received: from minnie.tuhs.org (2600:3c01:e000:146::1) by inbox.vuxu.org with ESMTPUTF8; 4 Mar 2023 15:09:07 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 28BDE412D6; Sun, 5 Mar 2023 01:09:02 +1000 (AEST) Received: from mail-vs1-xe2d.google.com (mail-vs1-xe2d.google.com [IPv6:2607:f8b0:4864:20::e2d]) by minnie.tuhs.org (Postfix) with ESMTPS id 55B5F412D5 for ; Sun, 5 Mar 2023 01:08:55 +1000 (AEST) Received: by mail-vs1-xe2d.google.com with SMTP id o2so5099759vss.8 for ; Sat, 04 Mar 2023 07:08:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ccc.com; s=google; t=1677942534; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=cOwwQl75OfOO5tAn3ZF4DvpjQHjBXYdRM51UzcYeYEc=; b=E/FMYQ8j2Gq4du4wsYSO8/E+lHHstiaR4zhZysW4il2H5WNPCd3W6I57qxpd9wYa7Z e/hN+Gix+O2LGI0YIGb+k/ODtWyBZ7435gYnrbVZhf6k8ib7qJcA+6KwspxcmMhDLlIW B12t8iWqz/nwrRgOLIaXeTSlqCxRsmhOqkzSo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1677942534; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=cOwwQl75OfOO5tAn3ZF4DvpjQHjBXYdRM51UzcYeYEc=; b=dZm4E3pe2zqMJ7pDxQdICl9KjbojBna9nuFa0gLV3XqY/lbZpGrA7GX5ddt2wkSESk Xq06H4m7aFn4Phe5exDucquCRfeQCQ1Npf72QIg4zDh+WEZVXem+XIQ4L34jPHjSe4Bi xGusqWY/25PSiejphOis8WgQ5eLaIFjrMgGj/7SOEvrMertzfLmMZCcprYX1UyTq+n8I hLIU+6aF9YxV5juUOAqG6XQPQl4Sjf9/imIFzQKdSNthyU+GfGzeEpQpMPmoP+LmGEUG 2Lwzn/Ovqmhlaa91N3zChh9rZwux/+k4499ZWVvALw31wHDgDg13NxCsvoLLBRLnCz1c v00A== X-Gm-Message-State: AO0yUKXUkW/EtxhkX6GIJAFufppt5ihGlvo7BO4fFIUQjYYJVev6XDM7 wiWrgDwn+ereIbc7u5FSDSrh3yLOkjI4cDoceOLLowbYpPBPv2vlEao= X-Google-Smtp-Source: AK7set/Pb/lXioi2mXy2Sw87kVBAFgsFyJF+6JmmHxokNf10qGVbtRqzVAGgLAB4BYNqnNkjiXa+HLrGwO6nUee4V94= X-Received: by 2002:a67:f546:0:b0:412:27f7:491b with SMTP id z6-20020a67f546000000b0041227f7491bmr3659414vsn.2.1677942533900; Sat, 04 Mar 2023 07:08:53 -0800 (PST) MIME-Version: 1.0 References: <20230304015746.DD95518C08D@mercury.lcs.mit.edu> In-Reply-To: <20230304015746.DD95518C08D@mercury.lcs.mit.edu> From: Clem Cole Date: Sat, 4 Mar 2023 10:08:28 -0500 Message-ID: To: Noel Chiappa Content-Type: multipart/alternative; boundary="000000000000afe00805f61470f1" Message-ID-Hash: 5DHGCLFKIZIKKWYE3HLXEO2AKYEN5AU4 X-Message-ID-Hash: 5DHGCLFKIZIKKWYE3HLXEO2AKYEN5AU4 X-MailFrom: clemc@ccc.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: tuhs@tuhs.org X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: A second Unix Patent List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: --000000000000afe00805f61470f1 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, Mar 3, 2023 at 8:58=E2=80=AFPM Noel Chiappa wrote: > The other possible explanation is that it was perfectly possible to run > UNIXes > of that era (V4 on) on machines without enough main memory to hold the > kernel > and a 'full-sized' process simultaneously. (Our original machine, an > -11/40, > started out without a lot of memory; I don't recall exactly how much, > though. > It had, I'm pretty sure, 3 banks of core; I was thinking it was 3 MM11-L > core > units, which would be 3x16KB, or only 48KB, but my memory must be wrong; > that's not really enough.) > It's interesting - we did the same thing at CMU - almost all of the 11/40's, 40e's and /34's we had in the 1970s running UNIX. We would order them with very minimalist - i.e. 48K and run UNIX swapping to RK05's (slowly) until we had the money to buy more memory and rotating storage ( which was almost always aftermarket - not from DEC) and then those systems would be maxed to 256K. Mellon actually got an original RK07 cheap, so its disks were all Digital (tape was aftermarket), but most of the Unix boxes had dual RK05's and then some storage that we could get cheap. A couple of years later, after I graduated and moved on, I think many groups put Enable's in a couple of them so they could break the 256K barrier - as I sent that code back to Ted and Mike after I wrote it at Tektronix. =E1=90=A7 --000000000000afe00805f61470f1 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Fri, Mar 3, 2023 at 8:58= =E2=80=AFPM Noel Chiappa <jnc@mercury.lcs.mit.edu> wrote:
The other possible explanation is tha= t it was perfectly possible to run UNIXes
of that era (V4 on) on machines without enough main memory to hold the kern= el
and a 'full-sized' process simultaneously. (Our original machine, a= n -11/40,
started out without a lot of memory; I don't recall exactly how much, t= hough.
It had, I'm pretty sure, 3 banks of core; I was= thinking it was 3 MM11-L core
units, which would be 3x16KB, or only 48KB, but my memory must be wr= ong;
that's not really enough.)
It's interesting - we did the same thing at CMU - almost all of th= e 11/40's, 40e's and /34's we had in the 1970s running UNIX.=C2= =A0 =C2=A0We would order them with very minimalist - i.e. 48K and run UNIX = swapping to RK05's (slowly) until we=C2=A0had the money to buy more mem= ory and rotating storage ( which was almost=C2=A0always aftermarket - not f= rom DEC) and then those systems would be maxed to 256K.=C2=A0 =C2=A0Mellon = actually got an original RK07 cheap, so its disks were all Digital (tape wa= s aftermarket), but most of the Unix boxes had dual RK05's and then som= e storage that we could get cheap.=C2=A0 =C2=A0 =C2=A0A=C2=A0couple of years = later, after=C2=A0I graduated and moved on,=C2=A0 I think many=C2=A0group= s=C2=A0put Enable's in a couple of them so they could break the = 256K barrier - as I sent that code back to Ted and Mike after I wrote=C2=A0it at Tektronix.
3D""=E1=90=A7
--000000000000afe00805f61470f1--