北京化工大学微机原理硬件实验七段数码管

data segment
io8255ct equ 28bh
io8255a equ 288h
io8255c equ 28ah
led db 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh
x db ?
y db ?
data ends
code segment'code'
assume cs:code,ds:data
start:mov ax,data
mov ds,ax
mov dx,io8255ct
mov al,80h
out dx,al
mov bx,offset led
ff: mov al,00h
mov y,al
mov x,al
qq: mov di,150
aa: mov dx,io8255a
mov al,x
xlat led
out dx,al
mov dx,io8255c
mov al,01h
out dx,al
mov cx,200
bb: loop bb
mov dx,io8255c
mov al,00h
out dx,al
mov dx,io8255a
mov al,y
xlat led
out dx,al
mov dx,io8255c
mov al,02h
out dx,al
mov cx,200
ee: loop ee
mov dx,io8255c
mov al,00h
out dx,al
dec di
cmp di,00h
jnz aa
inc x
cmp x,0ah
jnz tt
mov al,00h
mov x,al
inc y
cmp y,0ah
jz ff
tt: mov dl,0ffh
mov ah,06h
int 21h
jz qq
mov ax,4c00h
int 21h
code ends
end start