MUL AB
Deeoriptiors:
MUL AB multiplies the unsigned eight-bit integers in the
Accumulator and register B.
The low-order byte of the sixteen-bit product is left in the
Accumulator,
and the high-orderbyte in B.
If the product is greater than 255 (0FFH) the overflow flag is
set; otherwiseit is cleared.
The carry fiag is always cleared.
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