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=-1.0 required=5.0 tests=MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 26414 invoked from network); 13 Apr 2021 21:58:20 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 13 Apr 2021 21:58:20 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 3CE459BD41; Wed, 14 Apr 2021 07:58:12 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 1C5469BCD8; Wed, 14 Apr 2021 07:57:31 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 66B049BCD8; Wed, 14 Apr 2021 07:57:27 +1000 (AEST) Received: from nsstlmta02p.bpe.bigpond.com (nsstlmta02p.bpe.bigpond.com [203.38.21.2]) by minnie.tuhs.org (Postfix) with ESMTPS id 8773C9BCC3 for ; Wed, 14 Apr 2021 07:57:26 +1000 (AEST) Received: from smtp.telstra.com ([10.10.24.4]) by nsstlfep02p-svc.bpe.nexus.telstra.com.au with ESMTP id <20210413215724.OXVW15432.nsstlfep02p-svc.bpe.nexus.telstra.com.au@smtp.telstra.com> for ; Wed, 14 Apr 2021 07:57:24 +1000 X-RG-Spam: Unknown X-RazorGate-Vade: gggruggvucftvghtrhhoucdtuddrgeduledrudeltddgtddvucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuuffpveftpgfvgffnuffvtfetpdfqfgfvnecuuegrihhlohhuthemucegtddtnecunecujfgurhepfffhvffujgfkfhgfgggtsehttddttddtredvnecuhfhrohhmpeffrghvvgcujfhorhhsfhgrlhhluceouggrvhgvsehhohhrshhfrghllhdrohhrgheqnecuggftrfgrthhtvghrnhepkeeiteejueeuhfefgeeuvdduieefvedugfevtdffkefhffejkefhuddtteehtefhnecukfhppeduuddtrddugedurdduleefrddvfeefnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehhvghloheprghnvghurhhinhdrhhhorhhsfhgrlhhlrdhorhhgpdhinhgvthepuddutddrudeguddrudelfedrvdeffedpmhgrihhlfhhrohhmpeeouggrvhgvsehhohhrshhfrghllhdrohhrgheqpdhrtghpthhtohepoehtuhhhshesthhuhhhsrdhorhhgqe X-RazorGate-Vade-Verdict: clean 0 X-RazorGate-Vade-Classification: clean X-RG-VS-CLASS: clean Received: from aneurin.horsfall.org (110.141.193.233) by smtp.telstra.com (5.8.420) id 5FE6CD411EEB04F6 for tuhs@tuhs.org; Wed, 14 Apr 2021 07:57:24 +1000 Received: from aneurin.horsfall.org (localhost [127.0.0.1]) by aneurin.horsfall.org (8.15.2/8.15.2) with ESMTP id 13DLvMMh076778 for ; Wed, 14 Apr 2021 07:57:22 +1000 (EST) (envelope-from dave@horsfall.org) Received: from localhost (dave@localhost) by aneurin.horsfall.org (8.15.2/8.15.2/Submit) with ESMTP id 13DLvLEM076775 for ; Wed, 14 Apr 2021 07:57:22 +1000 (EST) (envelope-from dave@horsfall.org) X-Authentication-Warning: aneurin.horsfall.org: dave owned process doing -bs Date: Wed, 14 Apr 2021 07:57:20 +1000 (EST) From: Dave Horsfall To: The Eunuchs Hysterical Society In-Reply-To: <382F4422-D6B8-4749-9927-9EC19FE9CADD@pobox.com> Message-ID: References: <382F4422-D6B8-4749-9927-9EC19FE9CADD@pobox.com> User-Agent: Alpine 2.21.9999 (BSF 287 2018-06-16) X-GPG-Public-Key: http://www.horsfall.org/gpgkey.pub X-GPG-Fingerprint: 05B4 FFBC 0218 B438 66E0 587B EF46 7357 EF5E F58B X-Home-Page: http://www.horsfall.org/ X-Witty-Saying: "chmod 666 the_mode_of_the_beast" MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Subject: Re: [TUHS] SUN (Stanford University Network) was PC Unix X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On Sat, 10 Apr 2021, David Arnold wrote: [ Microbee ] > 6116 static RAM meant no mucking about with DRAM refresh either. Yep, that helped a lot; slower, but who cared? My memory is fading now, but I recall that the Z-80 had a "refresh" pin to tell any attached dynamic RAM to refresh itself. The Z-80 was my favourite chip :-) > Happy days. > > But I never tried to get a Unix on it. UZI or Fuzix might work? I toyed with the idea of Minix or LSX, but it would have to be stripped back and I didn't think that the Z-80 was up to it, even though I had the 128KB bank-switched model. With the Hi-Tech C compiler I did get a number of simple Unix programs to run, and even found a copy of CP/M UUCP (which was overlaid to to hell and back). I did have a copy of Concurrent CP/M, but never tried it. -- Dave