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    Marc is correct. All of ISC C compilers were based<br>
    on Bell Labs C compilers, starting with a C compiler<br>
    for the DEC VAX machine in 1978.<br>
    <br>
    Heinz<br>
    <br>
    <div class="moz-cite-prefix">On 3/7/2024 4:30 PM, Marc Rochkind
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAOkr1zWuTvEEj4i8FZQEE2cH9vcQJPLvEdt8kP7a=199fb29AQ@mail.gmail.com">
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      <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" moz-do-not-send="true"
            class="moz-txt-link-freetext">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"
            moz-do-not-send="true" class="moz-txt-link-freetext">imp@bsdimp.com</a>
          <br>
          > <mailto:<a href="mailto:imp@bsdimp.com"
            target="_blank" moz-do-not-send="true"
            class="moz-txt-link-freetext">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"
            moz-do-not-send="true" class="moz-txt-link-freetext">pugs78@gmail.com</a><br>
          >     <mailto:<a href="mailto:pugs78@gmail.com"
            target="_blank" moz-do-not-send="true"
            class="moz-txt-link-freetext">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" moz-do-not-send="true"
            class="moz-txt-link-freetext">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" moz-do-not-send="true"
            class="moz-txt-link-freetext">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" moz-do-not-send="true"
            class="moz-txt-link-freetext">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" moz-do-not-send="true"
            class="moz-txt-link-freetext">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" moz-do-not-send="true"
            class="moz-txt-link-freetext">https://www.program-transformation.org/Transform/CCompilerHistory.html</a>
          & <br>
          <a href="http://www.desmet-c.com/" rel="noreferrer"
            target="_blank" moz-do-not-send="true"
            class="moz-txt-link-freetext">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"
            moz-do-not-send="true" class="moz-txt-link-freetext">sauer@technologists.com</a><br>
          fax: +1.512.346.5240         Web: <a
href="https://technologists.com/sauer/Facebook/Google/LinkedIn/Twitter"
            rel="noreferrer" target="_blank" moz-do-not-send="true">https://technologists.com/sauer/<br>
            Facebook/Google/LinkedIn/Twitter</a>: CharlesHSauer<br>
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      <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"
                moz-do-not-send="true" class="moz-txt-link-freetext">mrochkind@gmail.com</a></i></div>
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