RISC/6000 assembler examples wanted

[Dick Karpinski]

I'm looking for examples of RISC/6000 assembler programs to assist
in a language processor port to the 6000.  The only thing we need
assembler for is to code up the co-routine transfer mechanism.

I found the man page for as, but have yet to find the Principles
of Operation or anything else that allows me to RTFM.  Obvious and
subtle hints about how to use Info will be appreciated.

Dick