From: imp@bsdimp.com (Warner Losh)
Subject: [TUHS] Zilog Z80 Unix
Date: Wed, 19 Apr 2017 22:50:16 -0600 [thread overview]
Message-ID: <CANCZdfoZ1t8RrANRRG9RBTW3euBKAM80g0AdROJ_hZRXW=4zvw@mail.gmail.com> (raw)
In-Reply-To: <20170420043410.815CC124AEAD@mail.bitblocks.com>
There were a number of 8088/8086 ports as well that didn't have memory
protection....
On Wed, Apr 19, 2017 at 10:34 PM, Bakul Shah <bakul at bitblocks.com> wrote:
> Yes, Cromemco was the company, Cromix their unix like OS.
>
> IIRC, in 1981-83 timeframe someone I worked with had mentioned
> he used to work at Cromemco and that they had a unix like OS
> called Cromix. Cromemco were in Mountain View so likely they
> were at the WCCF.
>
> Even though z80 could only address 64k, their system had a
> bank select under s/w control & upto 512K of RAM could be
> added. Z80 didn't have a supervisor mode but still, the bank
> select must have afforded enouh protection from bad pointers
> crashing random processes.
>
> On Wed, 19 Apr 2017 23:40:30 EDT Gregg Levine <gregg.drwho8 at gmail.com> wrote:
>> Hello!
>> That was also a board vendor. FYI: The first GASP [GetAway Special
>> Program] a Space Shuttle payload made use of such a board.
>> -----
>> Gregg C Levine gregg.drwho8 at gmail.com
>> "This signature fought the Time Wars, time and again."
>>
>>
>> On Wed, Apr 19, 2017 at 11:09 PM, Bakul Shah <bakul at bitblocks.com> wrote:
>> > On Wed, 19 Apr 2017 18:42:42 PDT "Erik E. Fair" <fair-tuhs at netbsd.org> wrote:
>> >> I have a memory of having seen a Zilog Z-80 (not Z8002 like the Onyx) based
>> >> Unix, possibly v6, at a vendor show or conference - perhaps the West Coast
>> >> Computer Faire (WCCF) in the late 1970s or early 1980s.
>> >>
>> >> I recall asking the people in the booth how they managed without an MMU, and
>> >> don't recall their answer. I do remember thinking that since Unix had "grown
>> >> up" with MMUs to stomp on obvious pointer mistakes, the software ought to be
>> >> relatively well-behaved ... you know: not trying to play "core war" with
>> >> itself?
>> >>
>> >> I searched the TUHS archives cursorily with Google to see if this has been
>> >> previously mentioned, but pretty much all Z80 CPU references have for its use
>> >> in "smart" I/O devices back in the day.
>> >>
>> >> Does anyone else remember this Z80 Unix and who did it? Or maybe that it was
>> >> a clone of some kind ... ?
>> >>
>> >> looking for a little history,
>> >>
>> >> Erik Fair
>> >
>> > You may be thinking of Cromemco.
next prev parent reply other threads:[~2017-04-20 4:50 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-20 1:42 Erik E. Fair
2017-04-20 2:54 ` Jason Stevens
2017-04-20 3:09 ` Bakul Shah
2017-04-20 3:40 ` Gregg Levine
2017-04-20 4:34 ` Bakul Shah
2017-04-20 4:50 ` Warner Losh [this message]
2017-04-20 7:03 ` Wesley Parish
2017-04-20 7:32 ` Wesley Parish
2017-04-20 4:32 ` Rik Schneider
2017-04-20 13:05 ` Clem Cole
2017-04-22 21:07 ` Dave Horsfall
2017-04-22 23:59 ` Clem cole
2017-04-23 0:01 ` Clem cole
2017-04-23 0:13 ` Larry McVoy
2017-04-24 0:04 ` Greg 'groggy' Lehey
2017-04-24 0:40 ` Larry McVoy
2017-04-23 5:14 ` Wesley Parish
2017-04-23 5:14 ` Wesley Parish
2017-04-20 21:32 ` Dave Horsfall
2017-04-20 21:59 ` Larry McVoy
2017-04-20 22:33 ` Steve Nickolas
2017-04-20 23:28 ` Pete Turnbull
2017-04-20 23:19 ` Harald Arnesen
2017-04-21 0:03 ` Andy Kosela
2017-04-23 17:58 ` Michael Welle
2017-04-20 12:34 Noel Chiappa
2017-04-20 13:41 ` Mutiny
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