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=-0.8 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, HTML_FONT_LOW_CONTRAST,HTML_MESSAGE,MAILING_LIST_MULTI, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 4368 invoked from network); 20 Dec 2023 16:23:50 -0000 Received: from minnie.tuhs.org (2600:3c01:e000:146::1) by inbox.vuxu.org with ESMTPUTF8; 20 Dec 2023 16:23:50 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id C92E443F06; Thu, 21 Dec 2023 02:23:45 +1000 (AEST) Received: from mail-ua1-x92f.google.com (mail-ua1-x92f.google.com [IPv6:2607:f8b0:4864:20::92f]) by minnie.tuhs.org (Postfix) with ESMTPS id 90E3C43F05 for ; Thu, 21 Dec 2023 02:23:35 +1000 (AEST) Received: by mail-ua1-x92f.google.com with SMTP id a1e0cc1a2514c-7cbfccbbbafso619721241.0 for ; Wed, 20 Dec 2023 08:23:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ccc.com; s=google; t=1703089414; x=1703694214; darn=tuhs.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=v9lNO6iz7gY+RHH8TaMNLW8MYNlIXkIKlUeFuqkShPs=; b=hOA1zwsrRmov173YMU7pNcrvtNy97WYhOiKNikeVu4IrLXmvLS7fkMaKKegclW/kxZ aYRV++3uOtp9batc3UQX8G/FBpsCE5WNhmaLGTR1pKKiVcAQaptE81A6Rr1QvBx8aEOL XaJ6KEPsO28hMQ9/667Oyo7iAhnzZ89w5sOzs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703089414; x=1703694214; 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=v9lNO6iz7gY+RHH8TaMNLW8MYNlIXkIKlUeFuqkShPs=; b=driyo40gs7N210ttlYvDHZykd3ge60paCErUYWW3xgB7tLAik5GoBqHkGC4JYsW1RF 2O8S8awtK34X8JTsbl318rRKu444XKHIMARxA8oWT/coNf5tGZJbrMC0DC+AAizcYa2B g/uXJmUw55EDOvYqPnqwkfgy6775UmgD2fr/L0e0paCRKXoPXGUVR1huAYnsvzzUJYV0 GFfgprq7Puqn2tUczK1SHIeke3xJFszE52erGCkOcAkxQQ3m9RWVRSmSiEWKCDOpX8jj fZKmVUIQz17yIZMTLh4uE3dEFb7Nf4bOUmVkIf6MuzoqO/1lsIWfQDDWgKo0IfAXpEcd 8U8w== X-Gm-Message-State: AOJu0YwkA27gENnfnL5kxp6DvkUsydHPL5xJdgr0OkXC7gd/pyBOOSBL Ks0cq0ecsW/X/Qvs7dU1Als90na7/TNmEBvfZQT8OUgu2WQD9Kj/ X-Google-Smtp-Source: AGHT+IGsRuXb4VyYIYR1uq5pjYakUu1IibtW3dafVZkJxH9VW6uly0z7a6ivp9/t6e7Ty/LQhWXjKyZmvt+xXyROb2k= X-Received: by 2002:a05:6122:129a:b0:4b6:d3d8:4c76 with SMTP id i26-20020a056122129a00b004b6d3d84c76mr2474116vkp.31.1703089414311; Wed, 20 Dec 2023 08:23:34 -0800 (PST) MIME-Version: 1.0 References: <93ef58b9-b058-4463-b0e6-d2f2f2bf5a55@loomcom.com> <76f6ae7e-20e1-41fa-9fe4-cc22015411bf@mhorton.net> <7DEABFE1-9015-461E-82EF-FF8E00516DBD@iitbombay.org> <1a126b3d-412e-4b54-89c7-2d643b47a0cf@mhorton.net> In-Reply-To: From: Clem Cole Date: Wed, 20 Dec 2023 11:22:57 -0500 Message-ID: To: Adam Thornton Content-Type: multipart/alternative; boundary="0000000000008faf5b060cf3679f" Message-ID-Hash: T3KEVKFVAESMBFKVX5M6CFMNJSTSDOXB X-Message-ID-Hash: T3KEVKFVAESMBFKVX5M6CFMNJSTSDOXB 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: The Eunuchs Hysterical Society X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: Compatibility question List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: --0000000000008faf5b060cf3679f Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Until the DECwriter series and the VT04, DEC sold OEM printers and terminals were made by other manufacturers. Paul is speaking of the traditional LP01, which Centronix made (I think) IIRC [Datapoint maybe -- I forget], and it was ordered with either an upper case only drum [faster - as it had two copies of the A-Z set] or an upper and lower case drum - which included some special characters. The 8-bit parallel interface was defined by Centronix, which was the standard printer interface for Minis and later PCs. The difference with the latter is that IBM used a common ground wire so they could put it in a DB25S connector. With the PC, IBM designed the interface using a bi-directional Intel parallel I/O chip so you could read it - which was not true of the earlier interfaces for PDP-8/10/11. As for the LP01 drum, it was possible to replace in the field but a PITA [we did when we got a used one from Tektronix's Finance shop that was running RSTS Cobol and moved it to the Teklab's 11/70 - V7++ UNIX system]. FWIW: when the Printronix was released in the late 1970s, it became the standard lineprinter for UNIX sites until the rise of laser printers. As for putting a 1403 on a PDP-10, I suspect it was possible, but it probably took some custom interfacing. =E1=90=A7 =E1=90=A7 =E1=90=A7 =E1=90=A7 On Wed, Dec 20, 2023 at 11:08=E2=80=AFAM Adam Thornton wrote: > On Tue, Dec 19, 2023 at 11:14=E2=80=AFPM Mary Ann Horton wrote: > >> I vaguely recall, as a teen, taking a tour of a DEC-10 shop in about 197= 0 >> in Portland. Their printer played "Anchors Aweigh" and I never knew how. >> But now I wonder - does this mean they had an IBM 1403 connected to a DE= C >> 10 somehow? >> > > It certainly means they had some kind of chain or train printer, but any > place big enough to have a PDP-10 would probably have had the budget for = a > serious printer as well. I don't know if DEC made a competing printer (I > think they were very early with dot matrix printing?) or not (or who othe= r > than IBM made big lineprinters), but once you know the trick is possible= , > the rest is a relatively simple matter of having someone with a good ear = to > tune the printer output so it sounds right. > > For a modern and delightful analogue to this, have a look at the > Floppotron. https://www.youtube.com/@PaweZadrozniak > --0000000000008faf5b060cf3679f Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Until the DECwriter series and the VT04, DEC sold OEM p= rinters and terminals were made=C2=A0by other manufacturers.=C2=A0 =C2=A0Pa= ul is speaking of the traditional LP01, which Centronix made (I think) IIRC= [Datapoint maybe -- I forget], and it was ordered with either=C2=A0an uppe= r case only drum [faster - as it had two copies of the A-Z set] or an upper= and lower case drum - which included some special characters.=C2=A0 The 8-= bit parallel interface was defined by Centronix, which was the standard pri= nter interface for Minis and later PCs.=C2=A0 The difference with the latte= r is that IBM used a common ground wire so they could put it in a DB25S con= nector. With the PC, IBM designed the interface using a bi-directional Inte= l parallel=C2=A0I/O chip so you could read it - which was not true of the e= arlier interfaces=C2=A0for PDP-8/10/11.

As for the LP0= 1 drum, it was possible to replace in the=C2=A0field but a PITA [we did whe= n we got a used one from Tektronix's=C2=A0Finance shop that was running= RSTS Cobol and moved it to the Teklab's 11/70 - V7++ UNIX system].

FWIW: when the Printronix was released in the late 1970s,= it became the standard lineprinter for UNIX sites until the rise of laser = printers.

As for putting a 1403 on a PDP-10, I suspect= it was possible, but it probably took some custom interfacing.=C2=A0
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On Wed, Dec 20, 2023 at 11:08=E2=80=AFAM Adam Tho= rnton <athornto= n@gmail.com> wrote:
On Tue, Dec 19, 2023 at 11:14=E2=80=AFPM Mary Ann Horton = <mah@mhorton.net> wrote:
= =20 =20 =20
I vaguely recall, as a teen, taking a tour of a DEC-10 shop in about 1970 in Portland. Their printer played "Anchors Aweigh&quo= t; and I never knew how. But now I wonder - does this mean they had an IBM 1403 connected to a DEC 10 somehow?
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