Primeval C compilers

Here I want to document the two earliest C compilers that have survived. They are written almost without comments and don't use structures, which makes the code a bit harder to read than it could be. The idea is to put more comments into the code to explain how it all works.

To learn about the history of C you should definitely check out Dennis' paper on it. He also wrote some notes on the two early C compilers.

This is all work in progress. More will appear here eventually (I hope).

Currently I have written comments and some notes for the first pass of the last1120c compiler. The original comments of course still remain.