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 );
| Routine | Required Header | Compatibility |
| _outp | <conio.h> | Win 95 |
| _outpw | <conio.h> | Win 95 |
| _outpd | <conio.h> | Win 95 |
For additional compatibility information, see Compatibility in the Introduction.
Libraries
| LIBC.LIB | Single thread static library, retail version |
| LIBCMT.LIB | Multithread static library, retail version |
| MSVCRT.LIB | Import library for MSVCRT.DLL, retail version |
Return Value
The functions return the data output. There is no error return.
Parameters
port
Port number
databyte, dataword
Output values
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.
See Also _inp