BP
STATUS
AND
NO.
This group of indicators permits the processor address
(usually 0)
and
current
internal
state
(RUN, WAIT, or
HALT)
of
the
BP
to be
displayed.
While
executing
in-
structions,
the
BP
is
normally in
the
RUN
or
WAIT
state.
The
HALT
state
is
entered
only when
an
address
halt
occurs,
the
processor
disable
is on (see
II
Operating
Procedures and
Information
U
) or
an
irrecoverable
processor
fault
occurs.
When
the
system
is
in
the
IDLE
state
as a result of power
on,
a
ZCHLT
command, or a
pC
command,
only
the
processor
address is
lighted
and
RUN, WAIT,
and
HALT
indicators
are
extinguished.
ALARM
AUDIO
This
4-position
rotary switch
controls
the
connection
and
volume of a loudspeaker, and
also
permits all
indicators
(except
POWER
ON
and
PRIMARY
POWER)
on
the
SCP
to
be
tested.
When this switch is in
the
OFF position,
the
loudspeaker is
disconnected.
Note
that
this switch does
not
inhibit
the
ALARM
indicator.
When this switch
is
in
the
LOW position, the loudspeaker
is
connected
and
the
volume is
set
to a low
level.
When this switch is in
the
HIGH position, the loudspeaker is
connected
and
the
volume is
set
to
a high
level.
When this switch
is
held in
the
LAMP
TEST
position,
all
back-lighted
indicators should
illuminate,
simultaneously. The switch returns
to
the
HIGH position when
released.
SCC FUNCTIONS
This switch controls
the
functional
capabilities
of
the
Sys-
tem Control Coosole{s). When this switch is in
the
ENABLE
position,
the
SCC device{s) may perform
the
various
con-
trol functions
attributed
to
a System Control Console.
Certain
control functions
require
the
system to
be
in
the
IDLE
state
while
others (as
described
under
II
Maintenance
Control Commands")
require
the
MAINT MODE switch
to
be
in
the
ON
posi ti on.
When
the
SCC FUNCTIONS switch is in
the
DISABLE
position,
the
controi functions
that
may be
entered
from
the
control
console
(to
interact
with
operating
software)
are
limited
to
the
fol lowing:
1.
Operator
requested
interrupt
(Zc
I
),
2.
Read Sense Switches (Zc
SSW
),
3.
Set
Sense Switches (Zc
SS
*).
The
operator
may lock out
potentially
disruptive control
commands when the operati
ng
software is runni
ng
by setti
ng
the
SCC FUNCTIONS switch to
DISABLE.
REMOTE
CHAN
NEL
This
3-position
rotary switch controls
the
manner in which
the
alternate
and
remote consoles may
operate.
When this
switch
is
in
the
SCC position,
the
alternate
and remote
i46
Controi Commands
consoles may be
connected
in
parallel
with
the
System
Control Console
and
may perform
the
same control
func-
tions
as
the
local control
device.
The remote console also
requires a manual
connection
through
the
RD1
data
set.
Note
that
any
restri
cti
ons upon
the
control func ti ons i
m-
posed upon
the
local control
device
by the SCC
FUNC-
TIONS
switch being in
the
DISABLE
position
also
apply
to
both consoles. Either
the
alternate
or remote
console
is
selected
for input by
the
AL
TSEL
switch on
the
Con-
figuration Control Panel (see
Chapter
6).
When the
REMOTE
CHANNEL switch is in
the
OFF position,
the
remote
device
is
disconnected
from the,ECS
at
the
data
set
(if present). The
alternate
console
functions in
the
I/o
mode.
When this switch is in
the
I/O
position,
the
alternate
and
remote consoles
operate
strictly
as
I/O
devices
communi-
cating
with the computer system
via
lOP
subchannel address
X'OB'.
Only
one
device
is
selected
for input
at
a time by
the
ALTSEL
switch on
the
Configuration Control Panel
(see
Chapter
6).
MAINT
MODE
During normal operations, this switch
is
placed
in
the
OFF
position. During
maintenance
and/or
diagnostic
activies,
this switch may be
placed
in
the
ON
position or momentar-
il>,
held in
the
RESET
position (switch
automatically
returns
to
the
ON
position when
released).
In
addition
to
causing
the
MAINTENANCE MODE
indicator
to become
illumi-
nated
when
placed
in
the
ON
position,
the
switch
also
en-
ables
certain
hardware controls
and
al lows
their
associated
control commands
to
be
entered
from
the
operator's
control
console
(see
"Maintenance
Control Commands"). This
i nterl ocki
ng
feature
prevents
inadvertent
adverse
effects
upon
the
current
program.
Caution
should be
exercised
in
activating
RESET,
since
this position
(equivalent
to
the
SCC
SUPER
RESET
com-
mand) causes a!! components of
the
system
to
be reset
and
initialized.
SELECT
DISPLAY
These
nine
switches,
labeled
CCP/SCSR
and
0 through
7,
are
used
to
specify
the
binary address of
anyone
of
up
to
256
Single
Clock
Status Registers
and
up to 32
Configura-
tion
Status Registers or Read Direct Mode 9 Status Reg-
isters whose
content
is to be displayed by
the
32 binary
indicators,
labeled
0 through
31.
Wh,:"
the
CCP/SCSR switch
is
in
the
SCSR
position,
swi
rches 0 through 3 specify
the
cluster
address and
sw~t(
:,es 4 through 7 specify
the
element
address of
the
Sin9ie Clock Status Register whose
content
is to be
displayed.
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