350 Alter or Display Storage
The alter/display utility
is
a dedicated utility that interrupts normal system operation to let you perform
specific storage operations.
For
example, you can alter or display:
• Storage, including:
Real main storage
Translated main storage
Control storage
• Disk storage
•
1/0
controller storage (display only)
• MSP registers
Note: All communication tasks should be completed or stopped before you start the alter/display utility.
You
can determine
if
a communications line
is
active by inspecting the Communications Line Status lights for
each line
("935 Displaying Communications Line Status" on page 9-6). The
DTR
(data terminal ready)
light is on when the line is active.
Note:
If
the spool writer is allocated to the system printer, the alter/display utility print options will
not
print. The spool writer must
be
stopped before you can allocate the system printer to the alter/display
utility. All alter/display screens can
be
printed on the system printer, using the Print key.
Selecting function 7 to start the alter/display utility stops the main storage processor (MSP). However, the
Alter/Display menu does not appear on the system console when the terminal unit block (TUB) chain
is
locked or
if
a work station error
is
being processed.
If
the Alter/Display menu does
not
appear on the system
console, end the alter/display function and attempt to start the alter/display utility again.
If
the Alter/Display Option menu still does not appear,
it
is probably because some program has the TUB
chain locked. End the alter/display function and wait until a later time to start the alter/display utility.
To Start the Alter/Display Function
1.
Ensure that the Security switch is in the Service position.
2.
Select Function 7 (Console Alter/Display) and press the Start Function
key.
The Alter/Display menu
is
displayed on the system console.
3.
Select an alter/display option and follow the displayed instructions.
3-22
5363
Maintenance Information
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