16/xw_/mxwp.asm

   1                 PUBLIC  MXWRITEPLANE
   2                 PUBLIC  MXREADPLANE
   3 MX_TEXT         SEGMENT PARA PUBLIC USE16 'CODE'
   4                 ASSUME CS:MX_TEXT, DS:DGROUP, SS:DGROUP
   5 MXWRITEPLANE:
   6         push            bp
   7         mov             bp,sp
   8         sub             sp,0
   9         mov             ah,byte ptr 6[bp]
  10         and             ah,0fH
  11         mov             al,2
  12         mov             dx,3c4H
  13         out             dx,ax
  14         mov             sp,bp
  15         pop             bp
  16         retf            2
  17 MXREADPLANE:
  18         push            bp
  19         mov             bp,sp
  20         sub             sp,0
  21         mov             al,4
  22         mov             ah,byte ptr 6[bp]
  23         and             ah,3
  24         mov             dx,3ceH
  25         out             dx,ax
  26         mov             sp,bp
  27         pop             bp
  28         retf            2
  29 MX_TEXT         ENDS
  30                 END