C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
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Port I/O Functions
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─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:  <conio.h>
 
  Syntax:   int _inp( unsigned port );
            unsigned _inpw( unsigned port );
 
            int _outp( unsigned port, int databyte );
            unsigned _outpw( unsigned port, unsigned dataword );
 
  Returns:  (_inp) the byte read from port.
            (_inpw) the word that was read.
            (_outp) the byte output.
            (_outpw) the word output.
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