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Program Execution Section 4-7
4-7 Program Execution
When program execution is started, the CPU Unit scans the program from top
to bottom, checking all conditions and executing all instructions accordingly as
it moves down the bus bar. It is important that instructions be placed in the
proper order so that, for example, the desired data is moved to a word before
that word is used as the operand for an instruction. Remember that an instruc-
tion line is completed to the terminal instruction at the right before executing
an instruction lines branching from the first instruction line to other terminal
instructions at the right.
Program execution is only one of the tasks carried out by the CPU Unit as part
of the cycle time. Refer to SECTION 7 PC Operations and Processing Time
for details.
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