_inp, _inpw, _inpd
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Inputs, from a port, a byte (_inp), a word (_inpw), or a double word (_inpd).
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These functions are obsolete. Beginning in Visual Studio 2015, they are not available in the CRT. |
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This API cannot be used in applications that execute in the Windows Runtime. For more information, see CRT functions not supported with /ZW. |
int _inp( unsigned short port ); unsigned short _inpw( unsigned short port ); unsigned long _inpd( unsigned short port );
Parameters
port
I/O port number.
The functions return the byte, word, or double word read from port. There is no error return.
The _inp, _inpw, and _inpd functions read a byte, a word, and a double word, respectively, from the specified input port. The input value can be any unsigned short integer in the range 0 – 65,535.
Because these functions read directly from an I/O port, they might not be used in user code in Windows NT, Windows 2000, Windows XP, and Windows Server 2003.
| Routine | Required header |
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_inp | <conio.h> |
_inpw | <conio.h> |
_inpd | <conio.h> |
For more compatibility information, see Compatibility.
All versions of the C run-time libraries.
Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.