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THE
80286
INSTRUCTION SET
LAHF-load
Flags
into
AH
Register
Opcode Instruction Clocks Description
9F LAHF 2 Load:
AH
= flags SF ZF
xx
AF
xx
PF
xx
CF
FLAGS MODIFIED
None
FLAGS UNDEFINED
None
OPERATION
The
low
byte of the flags word
is
transferred to AH. The bits, from MSB to LSB, are as
follows:
sign,
zero, indeterminate; auxiliary carry, indeterminate, parity, indeterminate, and carry.
See figure
3-5.
PROTECTED MODE EXCEPTIONS
None
REAL ADDRESS MODE EXCEPTIONS
None
8-59