25 May
2025
25 May
'25
8:30 p.m.
Jackson Helie G wrote:
What program's source code is on pages 145 - 169
(assembly listings are t1
- t8) in the CHM release of UNIX BOOK II?
From a quick look, this is the TMG compiler compiler runtime. The
compiler for the TMG language (TMGL) itself (almost certainly written
in TMGL) did not survive, nor did it's compiled output.
From the runtime, I recreated a TMGL compiler, and also a simple B
compiler, *BUT* I don't think either works within the exact (symbol
table?) space limits in the (previously entered) PDF files. I was a
TMG novice, and used labeled expressions freely; I don't doubt Doug
McIlroy's original version was FAR more clever (he had previously
worked on a TMG based PL/I compiler for Multics).
This is the first I've heard of PDFs coming to light in dmr's papers,
so I can't say if they're of the same documents.
My work is in a branch of my fork of the pdp7-unix repo:
https://github.com/philbudne/pdp7-unix/tree/tmg
Almost 2200 lines of notes on my Odyssey:
https://github.com/philbudne/pdp7-unix/blob/tmg/misc/tmg-notes.txt
Files I added:
https://github.com/philbudne/pdp7-unix/tree/tmg/src/other/pbtmg
TMGL compiler (compiles under itself and PDP-11 tmgl):
https://github.com/philbudne/pdp7-unix/blob/tmg/src/other/pbtmg/t0.t
B compiler in TMGL:
https://github.com/philbudne/pdp7-unix/blob/tmg/src/other/pbtmg/b.t