Reference Material on Unix internals?

[usenet]

Does anyone have any information regarding the internals of the Unix
kernel?  We are running BSD (AOS) 4.3 in IBM Mode on an RT PC.  I am
specifically looking for information on things like the user structure,
process structure, how segments (data, text, stack) are mapped into
memory and how they may be accessed, etc.  Please send E-Mail to the
above address.  Thanks...

Henry

************************************
*   You call this archaeology????  *
************************************