There's also the "PIKE C MODULE HOW-TO" that Elias Levy wrote for Pike 0.6.
/ Henrik Grubbström (Lysator)
Previous text:
2004-03-29 20:10: Subject: Re: ADD_FUNCTION() macro on pike 7.5 ?
Some core subsystems are documented; cf src/code/README.txt, src/gc.c etc.
There is actually some quite useful documentation of C-functions and macros available in Pike 0.5. Needless to say it is nothing near complete or up to date.
/ Martin Nilsson (provokatör)