Storage Select Switch - IBM System/370 145 Operating Procedures Manual

STORAGE SELECT SWITCH
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STORAGE SELECT
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REO CHAN 2 . • EXP LOCAL
II
STOR REGS
CHAN 3 •
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• This switch selects the proper storage for manual store/
display operations. It is also used with the ADDRESS
COMPARE switch and the ADDRESS COMPARE
CONTROL toggle switch for address match functions.
Customer Use
MAIN STORAGE
Th is position of the switch is used for normal program
processing and for manual store and display of main
storage.
LOCAL STORAGE
This position of the switch is used for manual store and
display of General·Purpose and F 10ating·Point registers.
16
NOTE
Use the alter/display function of the PR·KB
to alter/display main or local storage when·
ever possible.
Service Use
The remaining positions of the switch are for service per·
sonnel and are described in maintenance documentation.