A.1110H,7856H B.5678H,1234H C.5678H,1110H D.7856H,1011H
A.CX B.DX C.SI D.BP
A、寫計(jì)數(shù)器0 B、寫計(jì)數(shù)器1 C、寫計(jì)數(shù)器2 D、寫控制字