<div dir="ltr">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.)<div><br></div><div>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.<br><div><br></div><div>Marc</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Mar 7, 2024 at 5:15 PM Charles H Sauer (he/him) <<a href="mailto:sauer@technologists.com">sauer@technologists.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On 3/7/2024 5:52 PM, Warner Losh wrote:<br>
> <br>
> <br>
> On Thu, Mar 7, 2024 at 4:24 PM Warner Losh <<a href="mailto:imp@bsdimp.com" target="_blank">imp@bsdimp.com</a> <br>
> <mailto:<a href="mailto:imp@bsdimp.com" target="_blank">imp@bsdimp.com</a>>> wrote:<br>
> <br>
> <br>
> <br>
>     On Thu, Mar 7, 2024, 4:14 PM Tom Lyon <<a href="mailto:pugs78@gmail.com" target="_blank">pugs78@gmail.com</a><br>
>     <mailto:<a href="mailto:pugs78@gmail.com" target="_blank">pugs78@gmail.com</a>>> wrote:<br>
> <br>
>         For no good reason, I've been wondering about the early history<br>
>         of C compilers that were not derived from Ritchie, Johnson, and<br>
>         Snyder at Bell.  Especially for x86.  Anyone have tales?<br>
>         Were any of those compilers ever used to port UNIX?<br>
> <br>
> <br>
>     MIT had several that were used for ka9q and at least the Venix x86<br>
>     port. They supported the popular micros of the time. Various<br>
>     versions of them survive to the present day.<br>
> <br>
> <br>
> It's at bitsavers:<br>
> <br>
> <a href="https://bitsavers.org/bits/MIT/pc-ip/8086_C_19850820.tar" rel="noreferrer" target="_blank">https://bitsavers.org/bits/MIT/pc-ip/8086_C_19850820.tar</a> <br>
> <<a href="https://bitsavers.org/bits/MIT/pc-ip/8086_C_19850820.tar" rel="noreferrer" target="_blank">https://bitsavers.org/bits/MIT/pc-ip/8086_C_19850820.tar</a>><br>
> and<br>
> <a href="https://bitsavers.org/bits/MIT/trix/MIT_Compiler_Tape/" rel="noreferrer" target="_blank">https://bitsavers.org/bits/MIT/trix/MIT_Compiler_Tape/</a> <br>
> <<a href="https://bitsavers.org/bits/MIT/trix/MIT_Compiler_Tape/" rel="noreferrer" target="_blank">https://bitsavers.org/bits/MIT/trix/MIT_Compiler_Tape/</a>><br>
> <br>
> are pointers to compilers from the early 80s. Obviously not ANSI-C <br>
> compilers :)<br>
> <br>
> Warner<br>
<br>
See, also, <br>
<a href="https://www.program-transformation.org/Transform/CCompilerHistory.html" rel="noreferrer" target="_blank">https://www.program-transformation.org/Transform/CCompilerHistory.html</a> & <br>
<a href="http://www.desmet-c.com/" rel="noreferrer" target="_blank">http://www.desmet-c.com/</a>.<br>
<br>
When I only had PC/IX on an XT at my office and a PCjr at home, I mostly <br>
worked with C at home with DeSmet. I still have a couple of 5.25" 360K <br>
diskettes labeled C-Ware, which I think are DeSmet 2.4.<br>
<br>
Charlie<br>
<br>
-- <br>
voice: +1.512.784.7526       e-mail: <a href="mailto:sauer@technologists.com" target="_blank">sauer@technologists.com</a><br>
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Facebook/Google/LinkedIn/Twitter</a>: CharlesHSauer<br>
</blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><i>My new email address is <a href="mailto:mrochkind@gmail.com" target="_blank">mrochkind@gmail.com</a></i></div></div></div>