; 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