Output a byte(_outp), a word(_outpw), or a double word (_outpd) at a port.

int _outp(
   unsigned short port,
   int databyte 
);
unsigned short _outpw(
   unsigned short port,
   unsigned short dataword 
);
unsigned long _outpd(
   unsigned short port,
   unsigned long dataword 
);

Parameters

port

Port number.

databyte, dataword

Output values.

Return Value

The functions return the data output. There is no error return.

Remarks

The _outp, _outpw, and _outpd functions write a byte, a word, and a double word, respectively, to the specified output port. The port argument can be any unsigned integer in the range 0 – 65,535; databyte can be any integer in the range 0 – 255; and dataword can be any value in the range of an integer, an unsigned short integer, and an unsigned long integer, respectively.

Requirements

For additional compatibility information, see Compatibility in the Introduction.

Libraries

All versions of the C run-time libraries.

See Also

Console and Port I/O Routines | _inp | Run-Time Routines and .NET Framework Equivalents