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 autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 20068 invoked from network); 13 Mar 2023 16:15:16 -0000 Received: from minnie.tuhs.org (50.116.15.146) by inbox.vuxu.org with ESMTPUTF8; 13 Mar 2023 16:15:16 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 2F80141582; Tue, 14 Mar 2023 02:15:11 +1000 (AEST) Received: from mail-lj1-x22c.google.com (mail-lj1-x22c.google.com [IPv6:2a00:1450:4864:20::22c]) by minnie.tuhs.org (Postfix) with ESMTPS id 1EC2A41566 for ; Tue, 14 Mar 2023 02:15:03 +1000 (AEST) Received: by mail-lj1-x22c.google.com with SMTP id b13so13193833ljf.6 for ; Mon, 13 Mar 2023 09:15:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1678724100; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=Kvm66fWjQXqOAy0l+xxOGTjWbc8BEmZft+uyWSWhiQY=; b=PTz+nzg3EPlh/vqdaMpxDI0sQ2LcmMG9IWjL/qH9R1gEjf+WlHl7oMeMA1cmdIdZfV 728fXAXxaSvhSixNsJMvc4vbSbJ+LSZc54WItK0OQoK2q07JoHwmeiWwURJRpwQxapaL vEl3tFhu7zGRUFqETZl8dZgHWvMCIubtqio1qBCsvOkizbZC8KeTarNOyMHVzZLWLrAK rzKPbzN5gjraBoE7ZomZWLttVDH9koy0u88IpETsGwmtwA0MGhXJzk5xEfFH6eupQG94 RGP5Afttml7hBFVEb4Lz8pncj8Bnf2EeeYZF+le5U3kpvEZ1+DzadGD4TJhNEfqBJyZx UCbw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678724100; h=content-transfer-encoding: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=Kvm66fWjQXqOAy0l+xxOGTjWbc8BEmZft+uyWSWhiQY=; b=oBhdI1R4WvcFaNiBbBgdKiIMxwE8/FSv3kqChbZrEqkND7Xxq7pZNgH1gu6Y0Fx16m Lhd2oh5RDzc585Ob7q1mvejeFq3Orciujy9h7lXFjofLb/Pv3eCGm+N/20VGriEO8VT0 M7TKCleU6CS2Ht5PMAsx6Xt5dHR/KHyJN6yeA6H1inpXGEd0V0WmFQys7MWYddYiXUYU zKU0G/aVazBraRankVVfTxCiDEn7MDhgyheDCsnARQRbVQfXHHXau4SQ+baj+GpoEkzE KnGCcxiIDjb33XX+1unkJIOl7QAphkHf7W6NR4n3j8+AeECcUmDWmgOP2h6fIfGHxrio 77Lg== X-Gm-Message-State: AO0yUKU13nbBw98V/XvOtsTksuZRJVq3GCx/MZyCutNUtPfHudTv3aTT YM33y3G2+tE6/4Dnwo6cwY4NZ8T2gR82aZssueY= X-Google-Smtp-Source: AK7set/KZwrbNRAbpwzxKR57YTXCac1OkKR2VvCqtxsk9Xk37MBDJsp3+px0iDcuyULP3Oc9mWEcZkCSAnyKZ9H0dB0= X-Received: by 2002:a05:651c:204e:b0:295:a372:1dc2 with SMTP id t14-20020a05651c204e00b00295a3721dc2mr11085246ljo.8.1678724100445; Mon, 13 Mar 2023 09:15:00 -0700 (PDT) MIME-Version: 1.0 References: <78FE1F5F-7408-4BB0-8D2E-62AA00465774@planet.nl> In-Reply-To: From: Dan Cross Date: Mon, 13 Mar 2023 12:14:24 -0400 Message-ID: To: Warner Losh Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Message-ID-Hash: RXYZG3TMZC62B2UETZJMZY4TWGCIY2UG X-Message-ID-Hash: RXYZG3TMZC62B2UETZJMZY4TWGCIY2UG X-MailFrom: crossd@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: Paul Ruizendaal , "tuhs@tuhs.org" X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: virtual consoles / Alt-Fx List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: On Mon, Mar 13, 2023 at 11:41=E2=80=AFAM Warner Losh wrote= : > On Mon, Mar 13, 2023 at 9:24=E2=80=AFAM Clem Cole wrote: >> >> FWIW I think Minix for the 8088 may have supported them - be worth check= ing. > > Minix 1.1 and 1.2 didn't have them. Unsure of later versions since they a= ren't packaged nicely for quick checking. > > Coherent didn't seem to have them, but it's kinda hard to tell for sure w= ithout more study. I seem to recall that COHERENT _did_ have them, at least in version 4, but it's been a while. >> My bet would be to look at ITS, WAITES and Twenex for the origin story. > > TOPS-20 had a way to attach and detach from a PTY. But they didn't keep = the state of the screen... programs did, but not the kernel. Yes, one could detach and reattach sessions, but not only did they not preserve the state of the screen, they didn't preserve the state of the terminal; reattaching a session puts you back in TTY mode, though one could set it back up that in COMAND.CMD. - Dan C.