24小时时间显示 汇编语言实现

24小时，在屏幕上依次显示00:00:00――23:59:59

.model small
.data
 mydata   db 10 dup(20h)
  num     db 30h,30h,3ah,30h,30h,3ah,30h,30h,0dh,'$'
.code
.startup
        lea dx,mydata
lop1:   mov bl,0ah
lop2: mov bh,06h
lop3: mov si,0ah
lop4: mov di,06h ; 设循环次数
lop5: mov cx,0ah
lop6: mov ah,09h ;显示功能调用
int 21h
call near ptr delay   ;调用延时子程序
inc num+7            ;修改显示数字
loop lop6
mov num+7,30h
inc num+6
dec di
jnz lop5
mov num+6,30h
inc num+4
dec si
jnz lop4
mov num+4,30h
inc num+3
dec bh