Leor Zolman had a little firm her in NE called Brain Damaged Software (BDS) and he wrote and marketed a full C compiler called BDS C - http://www.bdsoft.com/resources/bdsc.html [ which is now freely available - including the sources]. For years Leor's compiler was the de facto standard K&R style C compiler for the 8080/z80 systems for CP/M and such systems. [What was important, is that until Leor, the CP/M community was using something called "Small C" which was a sub-set of the language. Leor managed to get V7/K&R into a 8080].

A couple of other folks (which I thought included Leor) had a UNIX-like system running on/with it that we showed to Dennis at first Boston USENIX in late the 1970s/early 1980s - that IIRC could take CP/M programs - [although they may have to been relinked]. My memory is that the system got sold/licensed to a firm on the west coast and marketed independently of BDS C, [you might ask Leor or maybe some like Phil Karn - i.e. any one that was doing both UNIX and CP/M in those days].

If forgotten the details, I do remember Dennis saying that it reminded him very much of early UNIX and was very impressed with job that had been done. The basic tools were there: sh, ed, grep, ls and it was quite usable modulo floppy disk speeds.

Clem

On Wed, Apr 19, 2017 at 9:42 PM, Erik E. Fair <fair-tuhs@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