Larry & Dave, thanks for jogging my memory. I'm pretty sure it was BDS C on that z80 Zenith computer. (See my longer post above.) I should add that around 1984 I got a copy of PC/IX for the IBM XT, directly from Interactive Systems in Santa Monica, where I knew a few people. That was true UNIX, System III, I think, and I used it for all of the examples for my book "Advanced UNIX Programming," which came out in 1985. It, of course, had a real Bell Labs C compiler. Marc On Thu, Mar 7, 2024 at 5:15 PM Charles H Sauer (he/him) < sauer@technologists.com> wrote: > On 3/7/2024 5:52 PM, Warner Losh wrote: > > > > > > On Thu, Mar 7, 2024 at 4:24 PM Warner Losh > > wrote: > > > > > > > > On Thu, Mar 7, 2024, 4:14 PM Tom Lyon > > wrote: > > > > For no good reason, I've been wondering about the early history > > of C compilers that were not derived from Ritchie, Johnson, and > > Snyder at Bell. Especially for x86. Anyone have tales? > > Were any of those compilers ever used to port UNIX? > > > > > > MIT had several that were used for ka9q and at least the Venix x86 > > port. They supported the popular micros of the time. Various > > versions of them survive to the present day. > > > > > > It's at bitsavers: > > > > https://bitsavers.org/bits/MIT/pc-ip/8086_C_19850820.tar > > > > and > > https://bitsavers.org/bits/MIT/trix/MIT_Compiler_Tape/ > > > > > > are pointers to compilers from the early 80s. Obviously not ANSI-C > > compilers :) > > > > Warner > > See, also, > https://www.program-transformation.org/Transform/CCompilerHistory.html & > http://www.desmet-c.com/. > > When I only had PC/IX on an XT at my office and a PCjr at home, I mostly > worked with C at home with DeSmet. I still have a couple of 5.25" 360K > diskettes labeled C-Ware, which I think are DeSmet 2.4. > > Charlie > > -- > voice: +1.512.784.7526 e-mail: sauer@technologists.com > fax: +1.512.346.5240 Web: https://technologists.com/sauer/ > Facebook/Google/LinkedIn/Twitter > : > CharlesHSauer > -- *My new email address is mrochkind@gmail.com *