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Assembly Source File  |  1989-05-03  |  405b  |  20 lines
  1. ;void  clr_num_lock();
  2.  
  3.     EXTRN  _memory_model:byte
  4.  
  5. _TEXT    SEGMENT BYTE PUBLIC 'CODE'
  6.     ASSUME CS:_TEXT
  7.     PUBLIC _clr_num_lock
  8. _clr_num_lock proc near
  9.     sub  ax,ax        ;clear AX
  10.     mov  es,ax        ;ES pts to 0000:0000
  11.     mov  al,11011111B    ;bit 5
  12.     and  es:[417H],al    ;clear the bit
  13.     cmp  _memory_model,0    ;quit
  14.     jle  quit        ;
  15.     db   0CBh        ;RET far
  16. quit:    ret            ;RET near
  17. _clr_num_lock ENDP
  18. _TEXT    ENDS
  19.     END
  20.