<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Bob,<div><br></div><div>PDP-11 comparability mode started in the VAX11-780 as microcode and later went to software emulation as time went in. The environment was from day one RSX-11. It included most of the files necessary to cross build for RSX hosts, including MACRO-11.<div><br></div><div>One of my systems runs the emulator. If I have a chance I will bring it up this weekend and add an account for you with proxy access. <br><br><div dir="ltr">-Steve Davidson<div><br></div><div>SF:iP1</div></div><div dir="ltr"><br><blockquote type="cite">On Mar 6, 2020, at 18:46, Thomas DeBellis <tommytimesharing@gmail.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
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<p>Didn't early Vaxen (11/780) also execute PDP-11 code? I would
imagine there would have been a PDP-11 assembler, but it might
have been a (RSX?) PDP-11 based one hosted on VMS. I also
(briefly) used the VAX assembler. Anyway, there would have been
no need for a cross assembler.<br>
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<p>The IBMSPL product for Tops-20 came with PDP-11 source code for
the DN60. I remember building images for execution, typically for
simple things like tweaking the EBCDIC/ASCII translate tables to
make somebody happy. What would have been nice would have been to
change them on the fly, but we never bothered. I also fixed a
small bug for HASP. Or at least I think I remember I did...</p>
<p>All I have now are the DN60 (simulated) JSYS files, which give
an interface to communicate with the DN60 over the DTE. These are
in MACRO-10. No IBMSPL, not front end stuff. Maybe I'll stumble
over it one of these days.<br>
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<div class="moz-cite-prefix">On 3/6/20 5:58 PM, Robert Armstrong
wrote:<br>
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<p class="MsoNormal"> Does anybody know if there’s a PDP-11
MACRO-11 cross assembler for VMS? I don’t want to set up a
whole PDP-11 simulation just to assemble one file <span style="font-family:Wingdings">J</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Bob<o:p></o:p></p>
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