5.asm

在显示器上显示九九表 有二进制转换十进制的显示子程序

data  segment
  d1 db '   ','$'
  d2 db '  ',13,10,'$'
data ends
assume cs:code,ds:data
code segment
start:
  mov ax,data
  mov ds,ax
  
  mov bh,1
  mov bl,1
  mov cx,9
lop_0:
  push cx
  push bx
  mov bh,0
  mov cx,bx
  pop bx
  mov bh,1
  
lop_1:
  mov ah,02h
  mov dl,bl
  or dl,30h
  int 21h
  
  mov ah,02h
  mov dl,'*'
  int 21h
  
  mov ah,02h
  mov dl,bh
  or dl,30h
  int 21h
  
  mov ah,02h
  mov dl,'='
  int 21h
  
  mov al,bh
  mul bl
  mov dl,al
  cmp al,09h
  ja dtoc
  jb disp0
  je disp0

ff:
  mov dx,offset d1
  mov ah,09h
  int 21h
  
  inc bh
  loop lop_1
  
  lea dx,d2
  mov ah,09h
  int 21h
  inc bl
  pop cx
  loop lop_0
  
  jmp exit00
disp0:
  mov ah,02h
  or dl,30h
  int 21h
  jmp ff
  
dtoc:
  push ax
  push bx
  push cx
  push dx
  mov cx,2
lp5:
  mov ah,0
  mov bh,10
  div bh
  push ax
  loop lp5
  mov cx,2
lp6:
  pop ax
  mov dl,ah
  or dl,30h
  mov ah,02h
  int 21h
  loop lp6
  pop dx
  pop cx
  pop bx
  pop ax
  jmp ff
  
exit00:
  mov ah,4ch
  int 21h
  
  code ends
  end start