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Single-Step Execution

If the STEP switch is in its active position (up), the computer will halt after completing the next instruction cycle. Pressing the RUN button repeatedly allows to run the program one instruction at the time.

To resume running the program normally, down the STEP switch, then press the RUN button.

If the switch is soddenly activated (up) during normal program execution, the computer will halt once the current instruction cycle is completed, entering single-step execution mode.