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_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,MAILING_LIST_MULTI, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 5806 invoked from network); 20 Dec 2023 16:34:42 -0000 Received: from minnie.tuhs.org (2600:3c01:e000:146::1) by inbox.vuxu.org with ESMTPUTF8; 20 Dec 2023 16:34:42 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 330C643F15; Thu, 21 Dec 2023 02:34:38 +1000 (AEST) Received: from mail-pg1-x535.google.com (mail-pg1-x535.google.com [IPv6:2607:f8b0:4864:20::535]) by minnie.tuhs.org (Postfix) with ESMTPS id 4CC7C43F12 for ; Thu, 21 Dec 2023 02:34:34 +1000 (AEST) Received: by mail-pg1-x535.google.com with SMTP id 41be03b00d2f7-5c6839373f8so709405a12.0 for ; Wed, 20 Dec 2023 08:34:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1703090073; x=1703694873; darn=tuhs.org; h=cc:to:subject:message-id:date:from:references:in-reply-to :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=GoLAzt0eg5ETeEbRaYYTUHKcQNx99TRxYPh1jl1v0/I=; b=eV9AowUT9z4EBM/+BoRAHpGDAdLWFlmiHW3n1tHmo5ukIQKgk3gb99WbtxDztl6MvS CV1a896BAzsjz5HEcG6qCWl8Dz9fDbtqn04+zjdwvrtc+kkzTXh3TPbQp4s4F48TVh62 8wG91twOnCTH+oIRa+6Nfy67U+kRp4XfchM5fqndOrR5Wp3nzhB4pTOvRPzklckC98co SPOKSS6VqTfCELQxXf3eMuzDJkKvWhDeSoqrllSKQEFu8JTCL3LpYQo7DWbpLZJljpZX Mg2rM9L6mpM1PQZ0zfUvkloU7wfD6qPGIG1Oin2Oyduv1t6zK/VVxOYv92pyWyy2lsgz 1iPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703090073; x=1703694873; h=cc:to:subject:message-id:date:from:references:in-reply-to :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=GoLAzt0eg5ETeEbRaYYTUHKcQNx99TRxYPh1jl1v0/I=; b=rluC/qlKPyCZnqkJNAhc3Po3JePpJO8sK82ZGjEcyOl54wINbiVLj+ExHUm57KKe86 A6x/wREuYgTzG5lDvVPrq5xNx6nSl1t5qxC8dw/oHwNJF4ncUvS1pEWEmevaedhA77Ti AEttSgI+d+HRaK6lgmfJwsJZZ+CBR8IoagQ+5zMcCdaWd6HKMrRWpSevFqMzbR/Y2x6s pLNVXfGXw1uixHWjaWlq7Tdbn5TKydbxan82mqNSfrUlCgYhZ0x3LMu6uX7zvQxCx3ix zagngr9txzE1kSRtshZ5mqzCn4wcXM84WKZfUTClO763bF6uB2sjx/YPSvKv6IQ7vXCD J7Fg== X-Gm-Message-State: AOJu0YyRiNTffPo1b+IZJVbRxjhdbMWyZb/AMaz/FUXYxEHybgWTc2ao xyI2u39A+yBTND+apOCGDbJ5Snu7CA9T2yO0sek5LZE/ X-Google-Smtp-Source: AGHT+IHa5GFuFIO9PgI2ya3VR6rtP9SmFkgTn+0CXaMh1qZBcmT8dpTNShFpRdzlpPdPNQBMZSapjf2iNX4mSMNIFQ0= X-Received: by 2002:a05:6a20:9152:b0:191:9d84:104e with SMTP id x18-20020a056a20915200b001919d84104emr4132738pzc.55.1703090073191; Wed, 20 Dec 2023 08:34:33 -0800 (PST) MIME-Version: 1.0 Received: by 2002:a05:6a10:844e:b0:52a:96f1:6718 with HTTP; Wed, 20 Dec 2023 08:34:32 -0800 (PST) In-Reply-To: <1a126b3d-412e-4b54-89c7-2d643b47a0cf@mhorton.net> 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> From: Paul Winalski Date: Wed, 20 Dec 2023 11:34:32 -0500 Message-ID: To: Mary Ann Horton Content-Type: text/plain; charset="UTF-8" Message-ID-Hash: OAYD75W25CBHRA3NJSM2WDCUHTP75GC5 X-Message-ID-Hash: OAYD75W25CBHRA3NJSM2WDCUHTP75GC5 X-MailFrom: paul.winalski@gmail.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: Compatibility question List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: On 12/19/23, Mary Ann Horton wrote: > > I vaguely recall, as a teen, taking a tour of a DEC-10 shop in about > 1970 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 DEC 10 somehow? They very well might have had an IBM 1403 printer on their PDP-10 system. DEC marketed the PDP-10 as their commercial raised-floor data center computing solution. They OEMed a lot of the high-end peripheral gear for the DEC-10/20 from third-party vendors in the IBM world. The high-end disk of the time was an OEM version of the IBM 3330 with an IBM block multiplexer channel-to-DEC MASSBUS adapter. DEC was notoriously bad at producing 9-track magtape drives. But they were smart enough to OEM high-end tape drives from Storage Technology Corporation, which made the gold standard of tape drives in the IBM data center world. So DEC did have the capability to attach IBM gear to the PDP-10. They would certainly have an incentive to use 1403 printers in this market. Nobody familiar with IBM line printers would consider the standard DEC line printers acceptable. The 1403 was typically connected to the S/360/370's byte multiplexer channel (transmits one byte at a time to each device; intended for slow peripherals such as card readers, line printers, card punches). I know DEC had IBM channel adapters for disks and tapes usually attached by selector or block multiplexer channels. They may have had a byte multiplexer channel adapter, too. -Paul W.