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Clear Reset
•
Clear reset mode enables you to reset the entire system and
clears the storage.
This mode does not have its own
display, it is set from the mode selection display.
To set clear reset:
1.
Type C into the 'mode selection' display.
2.
Press ENTER.
When clear reset is entered, execution of the current
instruction (if any), is halted. Any pending interrupts or
machine checks are cleared, and the CPU stops.
The
following system resources also stop:
•
All channels and their control units
•
A 11 adapters
•
All
1/0
devices (channel and natively attached)
Clear reset resets the channels and the CPU and initializes
the control registers.
It also clears to zero the values
of the following:
•
•
Current PSW
CPU timer
•
Clock comparator
•
General registers
•
Floating point registers
•
Main storage
•
Keys in main storage
•
Page description
The TOD clock is not altered and its parity remains
unchanged.
The mode selection display remains on the
screen and, when processor reset has been completed, RESET
COMPLETE
appears .
Proced 'lres
3 - 5 3
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