114
4-11 Program Execution
When
program execution is started, the CPU cycles the program from top to bot
-
tom, 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 instruction 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 as part of
the
cycle time. Refer to Section 6 Program Execution Timing for details.
Program Execution Section 4-11
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