User's Manual

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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