Chapter 1. Assembly Language and Processors
Conditional Instructions
Execution
of
conditional instructions on the 8085 differs from the 8080. The
8080
fetches
all
three instruction
bytes whether or not the condition
is
satisfied. The 8085 evaluates the condition while
it
fetches the second
instruction byte.
If the specified condition
is
not satisfied, the 8085 skips over the third instruction byte and
immediately fetches the next instruction. Skipping the unnecessary byte allows for faster execution.
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