+/**\r
+ Macro that converts PCI Segment and I/O Port to an address that can be\r
+ passed to the I/O Library functions.\r
+ \r
+ Computes an address that is compatible with the I/O Library functions. \r
+ The unused upper bits of Segment, and Port are stripped prior to the \r
+ generation of the address.\r
+ \r
+ @param Segment PCI Segment number. Range 0..65535.\r
+ @param Port I/O Port number. Range 0..65535.\r
+ \r
+ @return An address that the I/o Library functions need.\r
+\r
+**/\r
+\r