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7.2.5 ADDRESS/DATA DISPLAY/DATA
Switches
These four switches are used with several posi-
tions of the MODE SELECTOR switch to enter
addresses and data into main storage or control
storage. Also, the DISPLAY/DATA switches
(3 and 4) are used to display the LSRs. Their
specific use is covered under the various posi-
tions of the MODE SELECTOR switch.
7.2.7 FORCE CLOCK Switch
This switch initiates continuous processing unit
cycles (processing unit clocks run). With the
MODE SELECTOR switch in the ALTER STOR
position, the contents of the data switches are
transferred consecutively to all main storage or
control storage locations when the FORCE
CLOCK switch is on. The starting address is·
contained in MAR. Turning the switch off
terminates the operation.
This switch also forces the system into run mode
overriding the stop condition of the CH ECK
(RUN/STOP) switch.
PRO
J
RUNl
2
INSN STEP/
• DPLY LSR
5
6
4
I
~
• ALTER STaR
• ALTER MAR
IRPT
• DPLY STaR
.INSN STEP/
DPLY CHKS
·INSNSTEP/
•
DPLYPCR
~---------ADDRESS/DATA----7---------'
tSYS I NSN ST : ...
DPLY PWR CHK
COMM
DPLY
ON
o
o
PWR
FORCE
FAULT DPL Y CLOCK
PREV
a
IMPL
STaR SEL ADD CaMP
STOP
n
MODE SELECTOR
7.2.9 CE START Key
Pressing this key executes instructions beginning
at the address specified by the current micropro-
gram address register.
7.2.10 LAMP TEST Switch
When this switch is pressed, all system lights are
turned on unless the lamps or the lamp circuits
are defective.
OFF
OFF
.I..-l....l,---~!----7.2.11
DISPLAY INTENSITY Control
7.2.6 CLOCK Light
This indicator is turned on by the run latch or
the block processor clock signal from an I/O
attachment.
4 5 6
7
0000
8
4
2
1
7.2.8 CHECK Switch
This switch controls whether the system con-
tinues to run or stops when a parity error occurs.
When the switch is in the STOP position, the
system stops at the end of the current micro
instruction when a parity error occurs. When
the switch is in the RUN position, the error is
retained but the system continues to run.
The STOP position of this switch is overridden
when the FORCE CLOCK switch is on.
This control adjusts the intensity of the display
screen.
7.2.12 STaR SEL Switch
The storage select switch controls whether main
storage or control storage is addressed on manual
operations and address compare operations.
When addressing main storage on a manual oper-
ation or address compare operation, the switch
must be in the MAl N position. To address con-
trol storage on a manual operation or address
compare operation, the switch must be in the
CTL position.
Consoles
7-7
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