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Synopsis:
    #include <conio.h>
    unsigned int inp( int port );

Description:
    The inp function reads one byte from the 80x86 hardware port whose
    number is given by port.

    A hardware port is used to communicate with a device.  One or two bytes
    can be read and/or written from each port, depending upon the hardware.
     Consult the technical documentation for your computer to determine the
    port numbers for a device and the expected usage of each port for a
    device.

Returns:
    The value returned is the byte that was read.

See Also:
    inpd, inpw, outp, outpd, outpw

Example:
    #include <conio.h>

    void main()
      {
        /* turn off speaker */
        outp( 0x61, inp( 0x61 ) & 0xFC );
      }

Classification:
    Intel

Systems:
    All