文件名称：8255的应用__交通灯
文件大小：3KB
文件格式：ASM
更新时间：2012-01-14 15:53:56
12338255的应用__交通灯
; 8255lamp.asm ; 8255 traffic lamp ; porta EQU 8H portb EQU 9H control EQU 0bH ; dseg segment time db ? value db ? done db 0 intmask db ? dseg ends ; cseg segment assume cs:cseg, ds:dseg start: mov al,80h mov dx,control out dx,al ; 8255 初始化 sw: mov al,11h mov dx,porta not al out dx,al ; ALL RED LIGHT inc dx not al out dx,al mov cx,3 cp1: call delay loop cp1 lamp: mov al,14h mov dx,porta.....