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Text File  |  1985-01-17  |  282 b   |  19 lines
  1. ;    _inb.a - input byte from port.
  2. ;    (C) Copyright 1985 Gregory R. Mansfield - All Rights Reserved.
  3. ;    G. R. Mansfield.  85/01/16.
  4. ;    Ver 1.0-5116.
  5.  
  6.  
  7.     cseg
  8.     public    _inb_
  9.  
  10.  
  11. ;    BYTE _inb(port)
  12. ;    int port;
  13.  
  14. _inb_:    mov    bx,sp
  15.     mov    dx,[bx+2]    ; port
  16.     in    al,dx
  17.     xor    ah,ah
  18.     ret
  19.