Ted Lemon <mellon@isc.org> writes:

> > Where are they documented?  The architecture handbook only lists the
> > reserved opcodes, not their meaning.  (It also lists the PAL entry points.)
> > I haven't yet stumbled over the documentation for the PALcode ops of
> > the various DECchips.
> 
> The green architecture reference manual has all the information,
> AFAIK.   You can also read the MILO source.   I can't claim to have
> gone over this in depth, but this is my recollection from over a year
> ago.

The architecture reference manual lists the PALcode operations, and
their meanings.  those are basically kernel traps to PALcode.

It does _not_ describe the reserved opcodes, i.e. the hardware
dependent instructions which are used (in addition to the normal
instruction set) to actually _implement_ PALcode.


I think those might be in the actual chip reference manuals, but i'm
not sure.  i don't think i've ever looked carefully below the
PALcode.  8-)


cgd
-- 
Chris Demetriou - cgd@netbsd.org - http://www.netbsd.org/People/Pages/cgd.html
Disclaimer: Not speaking for NetBSD, just expressing my own opinion.