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,MAILING_LIST_MULTI,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 15056 invoked from network); 11 Jul 2022 21:47:45 -0000 Received: from minnie.tuhs.org (50.116.15.146) by inbox.vuxu.org with ESMTPUTF8; 11 Jul 2022 21:47:45 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 81A2740BB5; Tue, 12 Jul 2022 07:47:32 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuhs.org; s=dkim; t=1657576052; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding:list-id:list-help: list-owner:list-unsubscribe:list-subscribe:list-post; bh=0XwLUFEGf9YprU6kGsIUS4z8lYWDqsitd1+cpgH9dU8=; b=DO0hKB5Bifm8Gn/Fnig2EtkpyvSokap8YOMTXEbXBMwHmTf1L6wpK7Kx2YY3u9jGxdVZl8 /hBXA31+vwtNoxBMlAJRKR5VOjIYvAbhdIdLuV0Gfrwmf50ZW4DkoBxEzIlbk6W/VIGMQc TzwPcFCNayZ23LzyKm/S9rM++5MB7gw= Received: from ewsoutbound.kpnmail.nl (unknown [195.121.94.168]) by minnie.tuhs.org (Postfix) with ESMTPS id 492FA40BAE for ; Tue, 12 Jul 2022 07:47:15 +1000 (AEST) X-KPN-MessageId: f578a8ea-0162-11ed-a80d-005056aba152 Received: from smtp.kpnmail.nl (unknown [10.31.155.39]) by ewsoutbound.so.kpn.org (Halon) with ESMTPS id f578a8ea-0162-11ed-a80d-005056aba152; Mon, 11 Jul 2022 23:46:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=planet.nl; s=planet01; h=to:date:message-id:subject:mime-version:content-type:from; bh=0XwLUFEGf9YprU6kGsIUS4z8lYWDqsitd1+cpgH9dU8=; b=Zm9WzE9HzQvXiEYbyM4r8Pr6JW11LgJfenPqnqj1EKOj7l7FvhMGXNNQSOjaOVEtQBW0uuf/hBg7U 79WHf1KH4Eiq41u+sYNOqzWEFSWzZlHy0jQaOalFzO6q2AlOmuFxZXSvGuPx8HASEcCQnpO7H/RTbt JVll6euyYcLHaL9E= X-KPN-MID: 33|91NLprDqfOuMyFUYLZOV2ZpQfk1ogakkXwkZdCIL08qFRaajnpq4ZVD3U9Oyt5q 7zvM8DbHQW/DYxJOpoDs71rEFsbLHhyTQRrynpHzrP5I= X-KPN-VerifiedSender: Yes X-CMASSUN: 33|GJFBQCs354vO0ZAv2NGfVKrZaY41qFOKLqoYP1oFhzB/Vano14trN0kpQSFGwZx pO9oj1ir756CXCvgdEQpBvg== X-Originating-IP: 77.172.38.96 Received: from smtpclient.apple (77-172-38-96.fixed.kpn.net [77.172.38.96]) by smtp.kpnmail.nl (Halon) with ESMTPSA id 0005014d-0163-11ed-b8b0-005056ab7447; Mon, 11 Jul 2022 23:47:03 +0200 (CEST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.13\)) Message-Id: <678A3A5F-07C5-4F68-82F2-7308CD21B17C@planet.nl> Date: Mon, 11 Jul 2022 23:47:02 +0200 To: The Eunuchs Hysterical Society X-Mailer: Apple Mail (2.3654.120.0.1.13) Message-ID-Hash: RTQC734T3ISQMCRORLXMBR2JLPIBQGMQ X-Message-ID-Hash: RTQC734T3ISQMCRORLXMBR2JLPIBQGMQ X-MailFrom: pnr@planet.nl X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-tuhs.tuhs.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: LSX issues and musing List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Paul Ruizendaal via TUHS Reply-To: Paul Ruizendaal > If I can get this working, I have a long laundry list of modifications = and > experiments that I want to run with LSX, but as it stands, this is = where I > am stuck at. Once upon a time there was a Soviet home computer that was based on the = PDP-11, the BK0010: https://en.wikipedia.org/wiki/Electronika_BK (it is actually mostly a copy of the Terak 8510a -- = https://en.wikipedia.org/wiki/Terak_8510/a ) The guy that found the surviving floppy with LSX source code (Leonid = Broukhis) for the PDP-11 immediately ported it to the BK0010 and created = a fair amount of infrastructure around it: https://github.com/ignusius/bkunix He used the 2.11BSD toolchain to create a cross-compiler. As that = compiler had progressed significantly from the 5th Edition era compiler, = the kernel became smaller and he could squeeze some stripped = functionality back in. The repo says that the code there still works on = a normal PDP-11. I=E2=80=99ve never communicated with Leonid, but maybe Warren has = contact details for him. Also, the person who created LSX unix (Heinz = Lycklama) is reading this list -- but of course it has been 40+ years = since he last touched the code. Note that LSX only holds one process in core and swaps other processes = (NPROC =3D 3) out to floppy. It reportedly took several hours for the = Terak to self-compile LSX from source. At one point I added debugger = support to my own port of LSX to a TI-990 with just floppies ... let=E2=80= =99s just say, now I understand deeply why the original Unix debug = interface was an improvement opportunity :^)