prog7_5.asm

汇编语言-王爽 源代码 加 卜艳萍版源代码

stack  segment stack
       dw  256 dup(?)
stack  ends
data  segment
str    db 'Type "M" for 80*25 monochrome',0dh,0ah
       db 'Type "H" for 640*200 b&w',0dh,0ah,'$'
data  ends
code  segment
      assume  cs:code,ds:data
start:mov  ax,data
      mov  ds,ax
      mov  dx,offset str
      mov  ah,9
      int  21h
      mov  ah,1
      int  21h
      cmp  al,'M'
      je  m80
      cmp  al,'H'
      je h640
      jmp  start
  m80:mov  al,2
      mov  ah,0
      int  10h
      jmp  over
 h640:mov  al,6
      mov  ah,0
      int  10h
      over: mov  ah,4ch
      int  21h
code  ends
      end  start