Toggle Switches - IBM System/370 145 Operating Procedures Manual

TOGGLE SWITCHES
~
~
OFF
D
rESr
lamp Test
SHIfT
O
~~s~
AUA
CM~D
HARD
O
STOP
SYNCI
NORM
STOP
OI~1(
AOA
o
~~~~
NORMAL
o
OISABLE
All system control-panel and PR-KB indicators should light
when the LAMP TEST toggle switch is in the TEST position.
This switch can be operated at any time without affecting
system operation.
I nterval Timer
NORMAL
This position allows a value to be set into or read out of
the interval timer location, main storage location 80
(hex 50).
DISABLE
This position disables the' inte:-val timer. The content of
the timer is not available to the data flow for timer func-
tions. Display of timer location 80 (hex 50) in this posi-
tion shows the last value stored into storage location 80
(hex 50). This value could be the initial timer setting or
other program information.
Time-of-Day Clock (TOO ClK)
ENABLE SET
This position enables the set clock instruction to change
the value of clock.
SECURE
This position allows executing the set clock instruction
without affecting the clock value.
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Address Compare Control
This switch is used with the ADDRESS COMPARE and the
STORAGE SELECT rotary switches to determine the
action taken by the CPU-as a result of an address compare
match. The CPU should be in manual state (MAN indicator
on) before using this switch. (Example: Press STOP key.)
SYNC/NORM
This position is the normal operating position. This
position also provides a sync pulse for service use, and does
not result in a stopon an address match.
STOP
This position provides a soft-stop whenever an address
match is detected. To restart the CPU, press the START
key. With the switch in this position, the TEST indicator
is on.
HARD STOP
This position is for service personnel and is described in
maintenance documentation. With the switch in this
position, the TEST indicator is on.
Console-File Register Display
These switches are used by service personnel and are des·
cribed in maintenance documentation.