Path: csiph.com!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail From: D Finnigan Newsgroups: comp.sys.apple2.programmer Subject: Re: Project: 6th Edition Unix for the Apple IIe/IIc Date: Mon, 21 Mar 2016 02:41:20 -0000 (UTC) Organization: Mac GUI Lines: 29 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Injection-Date: Mon, 21 Mar 2016 02:41:20 -0000 (UTC) Injection-Info: mx02.eternal-september.org; posting-host="ac9e0e4d7dd3957fb97803ee6801bab8"; logging-data="26112"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+EN+emYSAa8apjSpRoJPap" User-Agent: Mac GUI Usenet In-Reply-To: Cancel-Lock: sha1:wxfGOOOy/ChGKpCtHGmu7MpcUL8= Xref: csiph.com comp.sys.apple2.programmer:2571 wssimms wrote: > Yes. In fact I have already written it. > > Unfortunately smartport isn't really fantastic since, as far as I > know, it is completely synchronous. The disk packs used > on the PDP-11 were very slow, but at least you had DMA and > disk interrupts. That's the same problem I encountered when I was designing a Unix system for Apple IIe back in 2010. And doubtless the same problem others had when they also designed Apple Unix systems in 1990. > I think the ideal mass storage device for Unix > on the Apple IIe is probably a DMA capable sdcard drive or > something like that. But it will just have to turn off interrupts > and take what it gets. Hum-ho. I wonder how many years it will be until we get an interrupting, DMA-capable solid-state disk for the Apple II. We just got an interrupting Ethernet card last year, so miracles do happen… :-) -- ]DF$ The Marina IP stack for Apple II-- http://marina.a2hq.com/