Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!uunet!mcsun!ukc!strath-cs!glasgow!bru-cc!eesrajm From: eesrajm@cc.brunel.ac.uk (Andrew J Michael) Newsgroups: comp.os.minix Subject: Re: MINIX on an ATARI TT Summary: Not surprised Message-ID: <2034@Terra.cc.brunel.ac.uk> Date: 14 Mar 91 18:13:23 GMT References: <47446@nigel.ee.udel.edu> Organization: Brunel University, Uxbridge, UK Lines: 42 In article <47446@nigel.ee.udel.edu>, HBO043%DJUKFA11.BITNET@cunyvm.cuny.edu (Christoph van Wuellen) writes: > Today, I tested a slightly modified MINIX (32-bit exception vectors) on > a TT. It did not boot, but I must say that there was a high-resolution > 19''-monitor attached to the TT, so I did not expect it to boot. > > If will look at the drivers if there are 24-bit I/O-adresses, if so, I > have to recompile the stuff and re-test. > > But I have no hope MINIX will boot on that TT. > > C.v.W. I'm no more surprised about this than you are :-) In fact I'm beginning to wonder if a version of MINIX which runs on an '020 will run without modification on a '030 anyway. A couple of Amiga owners have told me that AmigaMINIX with my suggested mods will run on an '020, but no-one seems to have had any joy on an '030. I wonder if this something peculiar to the Amiga, or whether it's about time to think about things like flushing the caches on a context switch. Since I don't have anything with an '030 in it (apart from a 3/80 which is busy running SunOS) I can't really experiment. Whilst thinking about the TT, I have been told by a fairly reliable source that the TT only has 80nS dynamic RAM in it. This sounds like about three or so wait states for a 33MHz '030, which suggests that there isn't much improvement over the 16MHz developer versions. Or to put it bluntly, the 33MHz part is basically just a marketing ploy. I've also been told that the lower 4Mb of the TT memory (the so-called ST RAM) is only 16-bits wide. If this is so, then the TT is not going to be much of an increase in performance over the Mega STE. Andy Michael -- Andy Michael "You might think that. I 85 Hawthorne Crescent couldn't possibly comment." West Drayton - `House of Cards' Middlesex email: eesrajm@brunel.ac.uk UB7 9PA or Andrew.Michael@brunel.ac.uk