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    VP/ix ran on both System III and UNIX System V/386 Release 3.2.
    <div class="moz-forward-container"> I do still have a copy of the
      VP/ix Environment documentation<br>
      and the diskettes for the software. I have the "Introduction to
      the<br>
      VP/ix Environment" for further reference for interested folks.<br>
      <br>
      Also found some information about VP/ix on these web pages:<br>
          1.
      <a class="moz-txt-link-freetext"
href="https://virtuallyfun.com/2020/11/29/fun-with-vp-ix-under-interactive-unix-system-v-386-3-0-and-86box/"
        moz-do-not-send="true">https://virtuallyfun.com/2020/11/29/fun-with-vp-ix-under-interactive-unix-system-v-386-3-0-and-86box/</a><br>
          2.
      <a class="moz-txt-link-freetext"
href="https://techmonitor.ai/technology/interactive_systems_is_adding_to_vpix_with_a_little_help_from_its_friends"
        moz-do-not-send="true">https://techmonitor.ai/technology/interactive_systems_is_adding_to_vpix_with_a_little_help_from_its_friends</a><br>
          3.
      <a class="moz-txt-link-freetext"
href="https://manualzz.com/doc/7267897/interactive-unix-system-v-386-r3.2-v4.1---release"
        moz-do-not-send="true">https://manualzz.com/doc/7267897/interactive-unix-system-v-386-r3.2-v4.1---release</a><br>
      <br>
      It's been a long time since I looked at this.<br>
      <br>
      Heinz<br>
      <br>
      <div class="moz-cite-prefix">On 3/13/2024 8:53 AM, Clem Cole
        wrote:<br>
      </div>
      <blockquote type="cite"
cite="mid:CAC20D2OPEwRcr8i5U1jEiLZ3kw2Ud1o6gWGySbG=h7pUY1Z2Ew@mail.gmail.com">
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          <div class="gmail_default"
            style="font-family:arial,helvetica,sans-serif"><font
              color="#0000ff">Thanks.  Fair enough.  You mentioned PC/IX
              as <i>ISC's System III</i></font></div>
          <div class="gmail_default"
            style="font-family:arial,helvetica,sans-serif"><font
              color="#0000ff"><br>
            </font></div>
          <div class="gmail_default"
            style="font-family:arial,helvetica,sans-serif"><font
              color="#0000ff">I'm not sure I ever ran ISC's System III
              port—only the V.3 port - which was the basis for their
              ATT, Intel, and IBM work and later sold directly.   </font><span
              style="color:rgb(0,0,255)">I'm fairly sure </span>ISC<span
              style="color:rgb(0,0,255)"> also called that port PC/IX,
              but they might have added something to say with 386 in the
              name—</span><span style="color:rgb(0,0,255)">I've
              forgotten. [Heinz probably can clarify here]. Anyway,
              this is likely the source of my thinking. FWIW:  </span><span
              style="color:rgb(0,0,255)">The copy of PC/IX for the 386
              (which I still have on a system I have not booted in ages)
              definitely has VPIX.</span></div>
        </div>
        <div hspace="streak-pt-mark" style="max-height:1px"><img alt=""
            style="width:0px;max-height:0px;overflow:hidden"
src="https://mailfoogae.appspot.com/t?sender=aY2xlbWNAY2NjLmNvbQ%3D%3D&type=zerocontent&guid=3204a35f-ce4a-4293-a798-1609c559a213"
            moz-do-not-send="true"><font size="1" color="#ffffff">ᐧ</font></div>
        <br>
        <div class="gmail_quote">
          <div dir="ltr" class="gmail_attr">On Wed, Mar 13, 2024 at
            11:28 AM Marc Rochkind <<a
              href="mailto:mrochkind@gmail.com" moz-do-not-send="true"
              class="moz-txt-link-freetext">mrochkind@gmail.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">
            <div dir="ltr"><a class="gmail_plusreply"
                id="m_-8287128288551880636plusReplyChip-0"
                href="mailto:clemc@ccc.com" target="_blank"
                moz-do-not-send="true">@Clem Cole</a>,
              <div><br>
              </div>
              <div>I don't remember what it was. But, the XT had an
                8088, so certainly no 386 technology was involved.</div>
              <div><br>
              </div>
              <div>Marc</div>
            </div>
            <br>
            <div class="gmail_quote">
              <div dir="ltr" class="gmail_attr">On Wed, Mar 13, 2024 at
                8:38 AM Clem Cole <<a href="mailto:clemc@ccc.com"
                  target="_blank" moz-do-not-send="true"
                  class="moz-txt-link-freetext">clemc@ccc.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">
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                  <div dir="ltr">
                    <div class="gmail_default"
                      style="font-family:arial,helvetica,sans-serif"><a
                        class="gmail_plusreply"
id="m_-8287128288551880636m_3099500064768897686plusReplyChip-1"
                        moz-do-not-send="true"><font color="#0000ff">@Marc</font></a><br>
                    </div>
                  </div>
                  <br>
                  <div class="gmail_quote">
                    <div dir="ltr" class="gmail_attr">On Tue, Mar 12,
                      2024 at 1:18 PM Marc Rochkind <<a
                        href="mailto:mrochkind@gmail.com"
                        target="_blank" moz-do-not-send="true"
                        class="moz-txt-link-freetext">mrochkind@gmail.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">
                      <div dir="ltr">
                        <div dir="ltr">At a trade show, I bought a
                          utility that allowed me to run PC-DOS under
                          PC/IX. I'm sure it wasn't a virtual machine.
                          Rather, it just swapped back and forth.
                          (Guessing a bit there.)<br>
                        </div>
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                    </blockquote>
                    <div><span class="gmail_default"
                        style="font-family:arial,helvetica,sans-serif"><font
                          color="#0000ff">Hmm ... you sure it was not
                          either VPIX or DOS/Merge -- ISC built VPIX in
                          cooperation with the Phoenix Tech folks for
                          PC/IX. I always bought a copy with it, but it
                          may have been an option.   LCC did DOS/Merge
                          originally as part of the AIX work for IBM and
                          would become a core part of OS/2 Warp IIRC. 
                          Both Merge and VPIX had some rough edges but
                          certainly worked fine for DOS 3.3 programs. 
                          The issue tended to be Win and DOS
                          graphics-based programs/games that played fast
                          and loose, bypassing the DOS OS interface and
                          accessing the HW directly.  For instance, I
                          never got the flight simulator (Air War over
                          Germany) for Dad's WWII plane (P-47
                          Thunderbolt) to run under either (i.e., only
                          under DOS directly on the HW. FWIW: In that
                          mode, Dad said the simulator flew a lot like
                          how he remembered it).</font></span></div>
                    <div><span class="gmail_default"
                        style="font-family:arial,helvetica,sans-serif"><font
                          color="#0000ff"><br>
                        </font></span></div>
                    <div><span class="gmail_default"
                        style="font-family:arial,helvetica,sans-serif"><font
                          color="#0000ff">Both Merge and VPIX used the
                          386 VM support and a bunch of work in the core
                          OS.   Heinz would have to fill us in here. 
                          The version of the 386 port ISC delivered to
                          AT&T and Intel only had the kernel changes
                          to allow the VM support for VPIX to be linked
                          in, but it was not there.   IICR (and I'm not
                          sure I am) is that Merge could run on PC/IX
                          also, but you had to replace a couple of
                          kernel modules.  It certainly would work on
                          the AT&T and Intel versions.</font></span></div>
                  </div>
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                    alt=""
style="width: 0px; max-height: 0px; overflow: hidden;"
src="https://mailfoogae.appspot.com/t?sender=aY2xlbWNAY2NjLmNvbQ%3D%3D&type=zerocontent&guid=f7a2e5fb-c49d-4665-93a4-75a17df7e9ca"
                    moz-do-not-send="true"><font size="1"
                    color="#ffffff">ᐧ</font></div>
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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>
              </div>
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