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 6748 invoked from network); 6 Jan 2023 16:40:32 -0000 Received: from minnie.tuhs.org (50.116.15.146) by inbox.vuxu.org with ESMTPUTF8; 6 Jan 2023 16:40:32 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id A69F742375; Sat, 7 Jan 2023 02:39:59 +1000 (AEST) Received: from mail-oi1-f180.google.com (mail-oi1-f180.google.com [209.85.167.180]) by minnie.tuhs.org (Postfix) with ESMTPS id C843042374 for ; Sat, 7 Jan 2023 02:39:42 +1000 (AEST) Received: by mail-oi1-f180.google.com with SMTP id j130so1474701oif.4 for ; Fri, 06 Jan 2023 08:39:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=HFPIMlc9GzEnRq666wmas8rkv4Ye+en9HHPS5ApUHnA=; b=oilMeiwUOFo2p1wEDiImSa8Qw4LmktM6GvbJCzEyqVtfxSgX530qsQSW07IEk4W9hV 1UA5C4cp1cxWsfZnvJPQBTU4gxglfioZU0XdW/iBG+YbtBVHCsBG47S0jXVcTSF375i/ R645DEOv2my9/Clt25dY6x63M2RPLKGXjUDN+XZ1BDA4FM9Dr0/wnofopOU0a36IVGr2 C2aayiBQGBY3UYCp72jL0Vc36O5/ouyoZkcKrtvv+esOhiN0AjaAISQyUVjQjhON33wp 7wT7x8g/fK+nQSLmrbybtleHaohzX6lVEHBx9M4w0FxGZplrz1x4wSfAGlwjDU32vu0X fW6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=HFPIMlc9GzEnRq666wmas8rkv4Ye+en9HHPS5ApUHnA=; b=BCpaTrzXrzm+yjANpIEm2G54Kad3SYmNuzTZ+G3Ix7W5NmU3eaZ/IfFzUfaFkriMyA jwqm6dc8+PKdmv9ApwXVuQk7i6S+67JXBrU7XXxPIQtSycQuTekMyrUevbDEag/OzR8d 64O7xaGsy6sZNuBFkSuQHgICkgpejnQiBwiByMWiVAGuMioRGeVKd+GqbDSDo0+zatDd ntAXj1bddwXpOmmVTqMwy3aiGmZbNVm8citT/vXX/+VQfT7Xsja0kyIxhsB/A9V2YYf6 zVAMN0niSegKaKgjR6RbFS0JJGufymtN6UQM5eYvfs+/rkairtPsGywBoDy8kY5dO+Yt i6ag== X-Gm-Message-State: AFqh2kqIbP5PXw0Z2EmRxnF/DwNgOWIlDKFcN5Wu7D8aYODl6gAsoUsJ OQIoSXKibD8vdo5bm45XvbqJENHr1x0= X-Google-Smtp-Source: AMrXdXtL5H2L7XwLXLWkDGA4XoL3iBc3C6f7Mik3OSXcOcYBZiNtvCmt+GvCxurjkYMfKchQiiH4Rw== X-Received: by 2002:a54:489a:0:b0:35c:28c7:612c with SMTP id r26-20020a54489a000000b0035c28c7612cmr24742094oic.13.1673023122014; Fri, 06 Jan 2023 08:38:42 -0800 (PST) Received: from illithid (ip68-12-97-90.ok.ok.cox.net. [68.12.97.90]) by smtp.gmail.com with ESMTPSA id v4-20020a056808004400b0035173c2fddasm549787oic.51.2023.01.06.08.38.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Jan 2023 08:38:41 -0800 (PST) Date: Fri, 6 Jan 2023 10:38:40 -0600 From: "G. Branden Robinson" To: Brad Spencer Message-ID: <20230106163839.oj7recybz3bk5ozp@illithid> References: <20221214151444.niv5xtnxlmoifbrm@illithid> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="yaqnnnr2cvxbef4w" Content-Disposition: inline In-Reply-To: Message-ID-Hash: Y63NC4VVMUPRR25ME4QKVGMJVFPIWIV6 X-Message-ID-Hash: Y63NC4VVMUPRR25ME4QKVGMJVFPIWIV6 X-MailFrom: g.branden.robinson@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: coff@tuhs.org X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [COFF] Re: Microware's OS-9 (was: [TUHS] Clever code) List-Id: Computer Old Farts Forum Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: --yaqnnnr2cvxbef4w Content-Type: text/plain; charset=us-ascii Content-Disposition: inline At 2022-12-14T10:39:59-0500, Brad Spencer wrote: > "G. Branden Robinson" writes: > The source to OS-9/6809 would have been released by Microware a long > time ago had it not been for a particular person in the user > community. Got mucked up. I fell out of following it after the BSD > Unixs became available. They guy's name wasn't Mark Siegel, was it? (Feel free to reply privately.) > Level II was nice. It was able to use bank switching and would allow > a set of random 8k memory blocks out of the 128k or 512k present in > the CC3 system to be mapped into the 6809 64k address space. The > Color Computer didn't support memory protection, so no paging or any > real process protection, but this banking allowed for a lot of > possibilities. I know that there was other OS-9 systems around that > ran Level II but I don't really know how they managed memory. I would > suspect it to be simular to the CC3, but that is just a guess on my > part. I ask because I asked around elsewhere, and this guy got very hostile very fast, and touted the GIME chip as performing "address translation" as if it were a Motorola 68451 or something. (I'm not sure even _that_ does address translation in the sense we think of it today, but in any case it was a more powerful, more complex and therefore expensive part than Tandy was ever going to replicate or put in their Color Computers.) 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