2.asm

2. 在显示九九表时有十种颜色变化如：按0—9键分别对应有十种不同颜色1. 二进制转换十进制的显示子程序能自动消除高位的0

data segment
  n7 db 7 dup(?)
data ends
code segment
  assume cs:code,ds:data
start:
  mov ax,data
  mov ds,ax
  mov n7[0],1
  mov n7[1],1
  mov cx,4
lop1:
  mov si,0
  mov al,1
  mov dl,31h
  mov ah,2
  push ax
  int 21h
  pop ax
lop2:
  xchg al,n7[si]
  inc si
  add al,n7[si]
  cmp al,0
  jz nex
  mov dl,al
  or dl,30h
  cmp dl,39h
  jle small
  add dl,7
small:
  push ax
  int 21h
  pop ax
  jmp lop2
nex:
  mov dl,0dh
  int 21h
  mov dl,0ah
  int 21h
  loop lop1
  mov ax,4c00h
  int 21h
code ends
  end start