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SECTION II.
OPERATOR'S CONTROL PANEL
CONTROL DISPLAY+I
The CONTROL DISPLAY+I button is effective only when the system is in the STOP mode.
If the CONTENTS indicators are not already illuminated when the CONTROL DISPLA Y+I button
is first pressed, the contents of the memory location specified by the memory address register
(i. e., the ADDRESS indicators) are displayed in the CONTENTS indicators.
If the CONTENTS
indicators are already illuminated when the CONTROL DISPLAY+I button is first pressed, the
configuration of the CONTENTS indicators remains the same.
Regardless of the initial state
of the CONTENTS indicators, each subsequent depression of the CONTROL DISPLA Y+I button
(after the initial depression) results in the following conditions:
1.
The contents of the control memory register specified by the CONTROL
indicators are displayed in the ADDRESS indicators;
2.
The character in memory stored at the address displayed in the ADDRESS
indicators in"I" above is displayed in the CONTENTS indicators.
(If
incorrect parity is' stored with the character in memory being referenced,
or
if
the addressed location does not exist, the PARITY indicator is il-
luminated.
See page 2-11 for a complete description of the PARITY in-
dicator. )
3.
The address displayed in "1" above is incremented by one and returned to
the control memory register designated by the CONTROL indicators.
For example, if the CONTROL indicators specify the sequence register (octal 17), whose
contents are 31478' depressing the CONTROL DISPLAY+I button twice causes 31478 to be
displayed in the ADDRESS indicators, the charactor in location 31478 to be displayed in the
CONTENTS indicators, and the contents of the sequence register to be incremented to 31508'
CONTROL DISPLAY-l
This button is effective only when the system is in the STOP mode.
The effect of the first
depression of the CONTROL DISPLAY -1 button is the same as that described above for the
CONTROL DISPLAY+l button.
When the CONTROL DISPLAY -1 button is depressed a second
time, conditions" 1" and "2" above result. and the address displayed in "1" above is decremented
by one and returned to the control memory register designated by the setting of the CONTROL
indicator s.
CONTROL DISPLAY
This button is effective only when the system is in the STOP mode.
When it is depressed,
~
conditions" 1" and "2" abQve result, but no incrementation or decrementation takes place.
2-4
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