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In addition, the monitor select position enables
the monitor voltage select switch and the aux voltage
select position enables the aux storage select switch
when 384K or 512K storage is installed.
Marginal Voltage Control
Ten potentiometers (one for each marginal voltage)
provide marginal voltage control, allowing the vol-
tage to be varied around its nominal value. More
than one voltage can be varied at the same time.
Marginal Voltage Indicators
Ten indicators, one for each of the above-mentioned
potentiometers, indicate when a marginal voltage
has been varied from its nominal value.
Monitor Voltage Select
This rotary switch selects a non-marginal voltage to be
monitored by the meter. The switch is active only
when the marginal voltage select switch is in the
monitor select position. The following system volt-
ages may be selected:
+3 #1
(Regulator 6)
+6
(Regulator 8)
+3 #2
(Regulator
5)
+6
ROS 1(Regulator1C)
+3 #3
(Regulator 2)
+6
ROS 2 (Emulator)
+3 #4
+18 (Regulator 13)
-3 #1
(Regulator 10)
+30 (Regulator
11)
-3 #2
(Regulator
7)
+48
(Regulator
9)
Section B - Storage Test
The storage test panel section permits testing the
main storage array.
Storage Test Select
This rotary switch selects one of the four test
pa~terns
to be applied to main storage. The four patterns are:
1. All Ones
2. All Zeros
3. Worst Pattern
4. Reverse Worst Pattern
The test light (Section N) is on when the storage
test sele.ct switch is off the Process position.
Write
This keylever switch causes the pattern defined by
the storage test select switch to be written into all
main storage locations when start is pressed.
Storage protection is ignored. The test is terminated
by a stop on check condition or by a system reset.
142
(3/71)
Model SO FEMM
Stop On Check
This key lever switch causes a detected storage error
to terminate the storage test.
Invert SAR Bit 16
This keylever switch inverts SAR bit 16, thereby
interchanging the two 32K halves of a 64K section of
main storage. With storage reversed in this manner,
words 0-8K are referenced as 8-16K and vice versa.
Words 16-24K are referenced as 24-32K, and so on.
Section C - Emergency Off
The emergency off pull switch is located on panel
section C. Pulling this switch turns off all power
beyond the entry terminal on every unit which is part
of the system or can be switched on to the system.
This switch therefore controls the system proper
and all control units and I/O devices that are switched
offline.
The emergency off switch latches in the "out"
position. Mechanical intervention by the customer
engineer is required to restore the switch to the
"in" position.
Section D
Panel section D shows major data paths in CPU,
channels, and storage elements.
Section F - Channel Control
This panel section provides three channel maintenance
controls.
Manual Operation
This keylever switch provides a means of manually
disconnecting the channels from the CPU and attached
adapters, and coupling them to the data and address
keys for control purposes. In manual channel opera-
tion, the address keys are used to control the channel
interfaces (CPU and I/O), and the data keys provide
data for use in the various control sequences. The
manual sequencing of any channel operation is pos-
sible.
When this switch is in the MPX position the multi-
plexor channel is selected for manual testing; when it is
in the SEL position, the selector channels respond.
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