VDHPortIO

Perform IO to a specified port.

This function is used to perform input/output operations to a specified local port.

Parameters

Pointer to a PORT_IO structure.

Exit

Return code.

Structures

typedef struct port_io_s
{
   ulong_t port;   (Input)
   ulong_t data;   (Input/Output)
   ulong_t flags;  (Input)
} PORT_IO;

port - indicates which port to read to, or write from.

data - contains the data read from a read request, or the data to write if a write request.

flags - indicate what operation to perform.

IO_READ_BYTE        Read a byte from the port
IO_READ_WORD        Read a word from the port
IO_READ_DWORD       Read a dword from the port
IO_WRITE_BYTE       Write a byte to the port
IO_WRITE_WORD       Write a word to the port
IO_WRITE_DWORD      Write a dword to the port