23 Jun
2016
23 Jun
'16
1:47 p.m.
On Jan 3, 2016, at 4:56 PM, Paul Koning <paulkoning
at comcast.net> wrote:
...
This Forth implementation is a port of Fig-FORTH by John S. James, with some
RSTS-specific magic added. I just realized the file header says that it is in the public
domain, so I suppose I should post the source...
Done. Thanks to Al Kossow, it now lives on Bitsavers, in bits/DEC/pdp11/forth/forth.mac
This is the RSTS run-time system, from V9.6 and later. I haven't tried building it on
older versions; the comments say it works back to V7.2. I don't remember why that
version is mentioned. Run time systems existed before then, though a few details did
change over time.
The original version was for RSX and RT-11. I did the RSTS port, and Kevin Herbert added
some more stuff to it later on. The biggest change is to make the vocabulary machinery
match the ANSI Forth 83 standard, which allows for lots of separate vocabularies and
arranging their search order. This was needed to allow SDA to define a set of 32 bit
replacements for the standard (16 bit) arithmetic operators of native Forth, without
getting itself all confused.
Build instructions are in the comments near the top of the file. There's very little
to it.
Enjoy.
paul