略語大辞典 [C] 28 DF direction flag (コンピュータの)方向フラグ. direction flag; a bit in a flag word of a computer; e.g. in 80*86, causes string instructions to auto decrement the appropriate index registers when set, and clearing DF causes auto increment; [C]. 丸善「略語大辞典」JLogosID : 11871606