_Start_ - When this switch is operated, the computer will start. The
first instruction comes from the memory location indicated in the Test
Address Switches.
_Stop_ - The computer will come to a halt at the completion of the
current memory cycle.
_Continue_ - The computer will resume operation starting at the state
indicated by the lights.
_Examine_ - The contents of the memory register indicated in the Test
Address will be displayed in the Accumulator and the Memory Buffer
lights.
_Deposit_ - The word selected by the Test Word Switches will be put in
the memory location indicated by the Test Address Switches.
_Read-In_ - When this switch is operated, the photoelectric paper tape
reader will start operating in the Read-In mode. (see Input-Output).
In addition to the operating push buttons, there are several separate
toggle switches.
_Single Cycle Switch_ - When the Single Cycle Switch is on, the computer
will halt at the completion of each memory cycle. This switch is
particularly useful in debugging programs. Repeated operation of the
Continue Switch button will step the program one cycle at a time. The
programmer is thus able to examine the machine states at each step.
_Test Switch_ - When the Test Switch is on, the computer will perform
the instruction indicated in the Test Address location. It will repeat
this instruction either at the normal speed rate or at a single cycle
rate if the Single Cycle Switch is up. This switch is primarily useful
for maintenance purposes.
_Sense Switches_ - There are six switches on the Console which are
present for manual intervention.