MUL              Multiply, Unsigned                  Flags: O D I T S Z A P C

*       ? ? ? ? *

MUL source

Logic:    AX   source * AL             ; if source is a byte

or

DX:AX = source * AX          ; if source is a word

MUL performs unsigned multiplication. If source is a byte, MUL

multiplies source by AL, returning the product in AX. If source is a

word, MUL multiplies source by AX, returning the product in DX:AX. The

Carry and Overflow flags are set if the upper half of the result (AH

for a byte source, DX for a word source) contains any significant

digits of the product, otherwise they are cleared.

Operands                  Clocks   Transfers  Bytes   Example

reg8                      70-77        -        2     MUL CH

reg16                    118-133       -        2     MUL BX

mem8                   (76-83) + EA    1       2-4    MUL A_BYTE

mem16                 (128-143) + EA   1       2-4    MUL A_WORD

Prev:     MOVSW Move String Word

See also: IMUL

See also: AAM

See also: EA

See also: Flags

Next:     NEG Negate