Is the 3b2 instruction set documented?

[Lyndon Nerenberg]

Is it possible to get ahold of a description of the 3b2 instruction
set and the calling conventions used by its (SVR3.2) C compiler? I
can't find anything that covers this in out AT&T product guides.

-- 
     Lyndon Nerenberg  VE6BBM / Computing Services / Athabasca University
         {alberta,cbmvax,mips}!atha!lyndon || lyndon at cs.athabascau.ca
                           Practice Safe Government
                                 Use Kingdoms