memory map for RT-11 v 5

Paul Koning paulkoning at
Fri Aug 12 09:09:45 CDT 2016

> On Aug 12, 2016, at 9:28 AM, Jerome H. Fine <jhfinedp3k at> wrote:
> ...
> V02C-02 is just one of the versions (out of about 23 versions) that are
> available on the CD image at classiccmp which is available for download.
> ...
> What I am curious about are the two files:
> Did these two files do anything special?

If you have enough memory (16 kW or more, I think) then you can run MACRO, the PDP11 macro assembler.  If all you have is 8 kW, that won't work.  Instead, you use EXPAND on your MACRO-11 source code to expand the macros, and ASEMBL on the resulting plain assembly language file.  Think of it like classic C compilers where you first run cpp to expand the preprocessor macros and then cc to compile the resulting foo.i file.

ASEMBL is somewhat like the earlier PAL11 no-macro assembler for the PDP11 paper tape system and early (V4) DOS.


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