16/xw_/mxwm.asm

   1                 PUBLIC  MXWRITEMODE
   2 MX_TEXT         SEGMENT PARA PUBLIC USE16 'CODE'
   3                 ASSUME CS:MX_TEXT, DS:DGROUP, SS:DGROUP
   4 MXWRITEMODE:
   5         push            bp
   6         mov             bp,sp
   7         sub             sp,0
   8         mov             dx,3ceH
   9         mov             ah,byte ptr 6[bp]
  10         and             ah,3
  11         or              ah,40H
  12         mov             al,5
  13         out             dx,ax
  14         mov             sp,bp
  15         pop             bp
  16         retf            2
  17 MX_TEXT         ENDS
  18                 END