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Assembly Source File  |  1985-06-21  |  512b  |  24 lines
  1. ;ROUTINE TO TURN ON INPUT FROM A COMMUNICATIONS LINE
  2. ;
  3. comon         proc far
  4. ;
  5.               push ds
  6.               push dx
  7.               push si
  8. ;
  9.               mov  si,dx
  10.               add  si,si
  11.               mov  dx,40h
  12.               mov  ds,dx
  13.               mov  dx,[si]
  14.               add  dx,4
  15.               mov  al,3
  16.               out  dx,al
  17. ;
  18.               pop  si
  19.               pop  dx
  20.               pop  ds
  21.               ret
  22. ;
  23. comon         endp
  24.