From: Robert Brockway <robert@timetraveller.org>
To: The Eunuchs Hysterical Society <tuhs@tuhs.org>
Subject: Re: [TUHS] SUN (Stanford University Network) was PC Unix
Date: Thu, 15 Apr 2021 15:01:01 +1000 (AEST) [thread overview]
Message-ID: <alpine.DEB.2.21.2104151421240.2534@mira.opentrend.net> (raw)
In-Reply-To: <alpine.BSF.2.21.9999.2104101311470.44871@aneurin.horsfall.org>
On Sat, 10 Apr 2021, Dave Horsfall wrote:
> On Fri, 9 Apr 2021, Paul Ruizendaal via TUHS wrote:
>
>> Z80 CP/M machines were still competitive in 1981-1983 (Osborne, Kaypro)
>
> And the Aussie Microbee... Wonderful machine, and easily hacked upon.
>
> For example, you could expand the memory by soldering several chips on top of
> each other and addressing the CS* line via bank-switching.
That worked on the old Radio Shack (Tandy) Color Computer 2 as well.
Until this moment I didn't know it had been demonstrated on any other
architecture.
The Operating System OS-9[1] Level One would detect this and use the
bank-switched memory if it was available. Presumably it kept identical
copies of itself in each bank as the entire address space switched.
Microware OS-9 was *nix-like in look and feel although it was very
different internally I think. OS-9 still exists today.
I started with OS-9 and so found Unix a comfortable environment when I
transitioned over.
[1] Which should not be confused with any operating system running on a
Mac. That's another story.
Rob
next prev parent reply other threads:[~2021-04-15 5:12 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-09 15:34 Paul Ruizendaal via TUHS
2021-04-09 17:01 ` Dan Cross
2021-04-09 17:20 ` Lawrence Stewart
2021-04-09 18:32 ` Jon Steinhart
2021-04-09 22:28 ` Warner Losh
2021-04-10 3:16 ` Dave Horsfall
2021-04-10 12:06 ` David Arnold
2021-04-13 21:57 ` Dave Horsfall
2021-04-13 22:30 ` Bakul Shah
2021-04-15 5:01 ` Robert Brockway [this message]
2021-04-16 1:17 ` Brad Spencer
-- strict thread matches above, loose matches on Subject: below --
2021-04-10 2:41 Jason Stevens
2021-04-09 14:41 Noel Chiappa
2021-04-09 15:18 ` Clem Cole
2021-04-09 5:31 Jason Stevens
2021-04-09 6:13 ` Jon Steinhart
2021-04-09 6:34 ` Rich Morin
2021-04-09 15:08 ` Clem Cole
2021-04-09 7:22 ` Lars Brinkhoff
2021-04-09 9:29 ` Lars Brinkhoff
2021-04-09 17:02 ` Al Kossow
2021-04-09 18:37 ` Lars Brinkhoff
2021-04-09 10:12 ` emanuel stiebler
2021-04-09 11:13 ` U'll Be King of the Stars
2021-04-09 17:22 ` Rob Gowin
2021-04-09 20:16 ` joe mcguckin
2021-04-10 2:22 ` Dave Horsfall
2021-04-09 14:08 ` Tom Lyon
2021-04-09 14:23 ` Jim Geist
2021-04-09 15:11 ` Clem Cole
2021-04-09 20:02 ` Earl Baugh
2021-04-09 20:08 ` Al Kossow
2021-04-09 20:46 ` Clem Cole
2021-04-10 1:30 ` Earl Baugh
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