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THE
80286
INSTRUCTION SET
CLD-Clear
Direction
Flag
Opcode
Instruction Clocks
Description
FC
CLO
2 Clear direction flag.
SI
and
01
will increment
FLAGS MODIFIED
Direction = 0
FLAGS UNDEFINED
None
OPERATION
CLD clears the direction flag. No other flags or registers are affected. After CLD
is
executed, string
operations
will
increment the index registers (SI and/or DI) that they
use.
PROTECTED MODE EXCEPTIONS
None
REAL ADDRESS MODE EXCEPTIONS
None
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