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Synopsis:
    #include <conio.h>
    unsigned long outpd( int port,
                        unsigned long value );

Description:
    The outpd function writes a double-word (four bytes), determined by
    value, to 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 transmitted is returned.

Example:
    #include <conio.h>
    #define DEVICE 34

    void main()
      {
        outpd( DEVICE, 0x12345678 );
      }

Classification:
    Intel

Systems:
    DOS/32, Win386, Win32, QNX/32, OS/2-32, Netware

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