CLD -- Clear Direction Flag

CLD -- Clear Direction Flag Opcode Instruction Clocks Description FC CLD 2 Clear direction flag; SI and DI will increment during string instructions Operation DF = 0; Description 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. Flags Affected DF = 0 Protected Mode Exceptions None Real Address Mode Exceptions None Virtual 8086 Mode Exceptions None