Intel 210200-002 manual STD SET Direction Flag STD, 1111111011

STD SET DIRECTION FLAG STD

Operation: Flags Affected:

(OF) -1OF

Description:

STD

STD (Set Direction flag) sets DF to 1 causing the string instructions to auto-decrement the SI and/or DI index registers. STD does not affect any other flags.

Encoding:

1111111011

Timing: 2 clocks

STO Operands Clocks / Transfers Bytes STO Coding Example

(no operands) 2 - 1 STO

2-153