2018年自考微型计算机及接口技术题二
时间:2022-05-17来源:江苏自考网
口地址:8253口址:280H----283H 8255口址:288H----28bH 程序如下: code segment assume cs:code start: mov dx,283h mov al,50h out dx,al mov dx,281h mov al,0fh out dx,al inout mov dx,28bh mov al,80h out dx,al mov dx,281h in al,dx and al,0fh mov dx,28ah out dx,al mov ah,01h int 16h