User's Manual

THE 80286 INSTRUCTION SET
AAM - ASCII Adjust AX After Multiply ·
Opcode
Instruction Clocks
Description
D4 OA AAM 16 ASCII adjust AX after multiply
FLAGS MODIFIED
Sign, zero, parity
FLAGS UNDEFINED
Overflow, auxiliary carry, carry
OPERATION
AAM should be used only after executing a MUL instruction between two unpacked BCD digits,
leaving the result in the AX register. Since the result
is less than one hundred, it is contained cntirely
in the
AL register. AAM unpacks the AL result by dividing AL by ten, leaving the quotient (most
significant digit)
in AH, and the remainder (least significant digit) in AL.
PROTECTED MODE EXCEPTIONS
None
REAL ADDRESS MODE EXCEPTIONS
None
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