This protects the
system command that would otherwise destroy the nucleus. If the command
must execute a single instruction or small group of instructions that
that the
possible.
operation of
The general
1. The
address field, the address of
entered whenever a supervisor call is executed.
2.
routine.
3. The called routine is called (via a
user save area
by the called
5.
the
system is driven by
calling routines
modules).
both for
written
calling nucleus-resident routines, and for
as commands (for example, disk resident
A typical coding sequence for an
LA
routine or
first eight bytes of this parameter list to find the name of the routine
or command being called.
The
and may be
in the routine or
2-26