Wasn't it Apollo, that used a pair of 68000s in their very early systems? Best,
Sean On Fri, Jul 3, 2015 at 7:59 PM, Johnny Billquist <b...@update.uu.se> wrote: > On 2015-07-04 01:54, m...@markesystems.com wrote: > >> In the late 80’s, I bought from a surplus/junk shop a (by then somewhat >> obsolete) Unix computer, branded UniSys, I think. It had 10 serial ports; >> one was the primary console, one was intended for a printer, and the other >> 8 were regular user TTYs. The processor was a 68000 (not 010, 020, or >> anything else), I don’t remember how much memory, and it had an integral >> full-height hard drive as well (60 mB, maybe?). >> >> When I say Unix, I mean real System-7 Unix – not Linux or any other >> *nix. I thought it was really a pretty neat system – 8 (or 9) users and a >> printer, just perfect for a small office – or my apartment at the time, >> which had a terminal or two in every room. I learned how to program in >> Unix on that machine, since it matched exactly the System 7 manuals I had. >> Sadly, time moved on, I got married, and got rid of a bunch of “useless >> junk”, like that computer. >> >> Recently, I’ve been reminiscing and poking around some on the Web to try >> to find information about it, but it seems to have vanished completely with >> nary a ripple. Has anyone else stumbled across this unit, or at least have >> any knowledge of it? It was a black case, about the size of a standard >> IBM-PC, with ten serial ports on the back and not much else. I’d sure be >> interested to know where I might locate data about that unit, or (gasp!) >> possibly even an existing one... >> > > I find it hard to believe it was a plain 68K in there. That CPU have some > serious issues that makes it close to impossible to implement virtual > memory or proper usermode protection. > (Yes, it can be done, but the amount of hardware required means most did > not. I think SUN did it with their own MMU, and an extra CPU in there. > Trying to remember who else - I seem to remember one other company who > actually used a plain 68K, and it was not Unisys.) > > Essentially, the 68010 is pretty much the minimum of processor needed to > make a sane system to run Unix on. > > Johnny > > -- > Johnny Billquist || "I'm on a bus > || on a psychedelic trip > email: b...@softjar.se || Reading murder books > pdp is alive! || tryin' to stay hip" - B. Idol >
