How many machine cycles do one byte instructions have?
Depending on the particular microprocessor, a machine cycle is
the fetch or store of one (typically, one byte) native word. In the
8085, this is a byte fetch or store, plus the overhead in decoding
and processing the instruction. In this case, the first machine
cycle is four clock cycles, or T states, and subsequent machine
cycles are three clock cycles, although certain instruction
sequences, such as DAD, require two extra clock cycles.