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I
6.
SECTION II.
OPERATOR'S CONTROL PANEL
When a program check occurs.
This is not a normal stop condition
(refer to page 2-12 for a description of this condition).
After an abnormal stop, the program generally cannot be resumed successfully by simply
depressing the RUN button.
The operator may attempt to restart the program at the nearest
possible point in the program at which the abnormal stop occurred.
SY ST EM C LEAR Button
This button is effective only after the STOP button has been depressed.
When the SYSTEM
CLEAR button is depressed, the following conditions result:
1.
Central processor operations terminate at the end of the current memory
cycle;
2.
The RUN indicator is turned off;
3.
The central processor cycle counter is reset;
4.
The PARITY indicator is turned off; and
5.
The PROGRAM indicator is turned off.
Peripheral operations are allowed to be completed, except in the console and the magnetic
tape control.
If
data is being transferred
~
the console or tape when the SYSTEM CLEAR button
is depressed, the transfer is not completed.
If data is being transferred from the console or
tape when the SYSTEM CLEAR button is depressed, no further information enters memory.
However, tape movement continues until an interrecord gap is sensed.
If an instruction is
stored in a peripheral device, the STOP indicator does not illuminate after the SYSTEM CLEAR
button is depressed.
INITIALIZE Button
The INITIALIZE button is effective only after the STOP button has been depressed.
When
held down, this switch causes all control panel lamps, except AC ON, AC OFF, DC ON, RESET
DC OFF, VOLTAGE, FAN, and CB to illuminate, thus providing a filament test.
When the
INITIALIZE button is released, only the CONTROL and SENSE switch indicators remain illumi-
nated in their original states: all other indicators are turned off.
Depressing the INITIALIZE
button results in the following conditions:
1.
The STOP indicator is illuminated, and central processor operations are
terminated immediately;
2.
Central processor stored instructions and subcommands are reset;
3.
The central processor parity, overflow, and zero balance indicators,
and other auxiliary storage functions, are cleared;
2-6
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