IBM System/370 Operator's Reference Manual page 60

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System/370 Model 168 (cont'd)
To Clear Main Storage
Under normal operation, it is unnecessary to clear storage because the operating system
provides this function as required.
1.
Depress and hold ENABLE SYSTEM CLEAR.
2.
Press SYSTEM RESET. Manual light comes on.
3.
Re·IPL.
Hard Stop Option
The hardstop option is normally specified for limited operation and should be used
only on recommendation of the service personnel. In this case, MACHINE CHECK is
set to STOP ON CHK and is left in this position. At stop time:
1.
Record all check lights that are turned on; save the information for the
service personnel.
2.
Re-IPL, or
Sl!e
appropriate operating system operator's library manual.
Page 3-21

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