I
SOFTWARE CONSIDERATIONS
C
References to software in
this
publication are limited to those features
of the
hardware
that
provide for software or take
it
into consideration.
SYSTEM
MONITOR
A monitor
program
;s
loaded
at
system
dead
start
and
remains in
memory
for
as
long
as
the system
is
used.
Only
the monitor
program
executes
in monitor
mode
and
can
execute monitor
instructions.
A
program
executing in monitor
mode
cannot
be
interrupted
unless the Monitor
Mode
Interrupt
(MMI)
option
is
present.
A monitor program
is
designed
to
reference
all
of
memory.
OBJECT
PROGRAM
An
object
program
as
referred to in
this
publication
means
any
program
other than the monitor program. Generally, the
term
describes a job-
oriented
program
but
may
also describe
an
operating system task
that
does
not execute in monitor
mode.
An
object
program
may
be
a
machine'
language
program
such
as
a
FORTRAN
compiler or
it
may
be
a
program
resulting
from
compilation of
FORTRAN
statements
by
the compiler.
OPERATING
SYSTEM
The
operating system consists of a monitor program, object
programs
that
perform system-related functions, compilers, assemblers,
and
various
utility
programs.
The
operating system
is
loaded into
memory
and
possibly
onto
mass
storage during system
dead
start.
Features of the operating system
system
and
organization of storage,
which
is
a function of the operating
system, will
be
described in the operating system reference
manual.
SYSTEM
OPERATION
System
operation begins
at
CPU
dead
start.
Dead
start
is
that
sequence of
operations required to
start
a
program
running in the
computer
after
power
has
been
turned
off
and
then turned
on
again.
2240004
C-1
E
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