Table
25.
Functions
of
Processor Cluster Configuration Control Panel
Row
(cont.)
Label
REAL-
TIME
CLOCK
SEL
Label
POWER
NNORM
POWER
ON
SYSTEM
SEL
CLOCK
SEL
UNIT
ADDRESS
PORT
ENABLE
INTLV
Swi
tch/lndi
cator
Function
8 switches
Four groups
(labeled
RTC1,
RTC2,
RTC3,
and
STC)
of 2 switches
each
(labeled
SO
and
51),
used for
selecting
the
real-time
clock
frequencies;
each
of
the
three
real-time
clock
counters
and
the
one
subjective
clock
counter
may have
their
frequencies
selected
by
the
proper combination of the two switches associated with
each
counter:
SO
51
Frequency (Hz)
-
-
0
0
500
0
1
External
real-time
clock
source
1
0 2000
1 1 Power line
Table
26.
Functions
of
Memory
Unit
Configuration Control Panel
Row
Swi
tch/lndi
cator
1
indicator
1 switch
1 switch
1 switch
3 switches
6 switches
1 switch
Function
Lighted when unit power is shut down
due
to
abnormal operational
condition.
When in up or middle position,
enables
power-on control in the
unit
power supply. (Middle position inhibits
the
unit reset
signal.)
When
.in
down position, power
to
unit is off.
Determines to which
central
shared resources
the
reset signal is
connected.
Selects
which
clock
the memory shall use; up position
selects
system
c.lock A, down position
selects
system
clock
B.
Establishes
the
logical address of
the
unit within a group of memory
units.
Down position disables, up enables, corresponding port when setting
up different configuration in
the
system. Switch 1 (leftmost)
cor-
responds
to
port 1,
etc.,
and
switch 6 corresponds
to
port 6.
Up
position
selects
interleave
addressing mode in
each
memory unit;
down position means no interleaving in any memory unit.
Only
two-way
interleaving
is
allowed.
The unit
interleaved
with this
memory unit must
have
its
interleave
switch on
and
be in
the
appro-
priate
addressing range. The
interleave
logic
operates
only for
memory units with a number corresponding
to
a power of 2:
i.
e.
,
16K, 32K words;
if
other
than a power
of
2, the
interleave
signal
it
receives
is
ignored. Interleaving
is
permissible only:
1.
Between two memory units of
the
same
size.
I
2.
I
Provided
the·two
memory units cover
an
addressing range
that
is continuous and starts
at
a multiple of
the
size
of
the
two
memory units
taken
together.
Configuration Control Panel 153
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