Support for more compilers (it only works for sure under Borland C++ 3.1)
(work for Microsoft Visual C++ is in progress)

//A bug in the sendByte function was discovered so that more than one byte of //data couldn't be sent at the same time without a possibility of data loss.  //This was pointed out to me by Elias Gil.
*** fixed on 16 August 1998 by Keith Welker (with the help of Elias Gil

In general, convert all(all possible any ways) functions so they
	are passed the port string "COM?" instead of a UART *.

Implement the code necessary to open more than 1 port at a time.
	The global UART will then be an array.  Use a #define to determine
	the number of possible ports open at one time.  The "COM?" string
	will be used to determine which port is to be used.  (Don't forget
	about the interrupt service routine).

Implement an autobaud detect.  It should use a string to pass to
	the port that will cause return of some data.

Detect for buffer overrun and then exit.  Say that the setting can
	be changed in the header file 'rs232.h'.

decrease the minimum allowed baud rate of 600.

detectPortIrq not implemented yet.  It might be based on
	what the current interrupt vector is.  If it is the standard
	bios vector, it is probably free.

Need to be able to detect if the com port is in use.  This
	will make this code gracefully work under windows Nt.  It
	will work now as long as you don't try to use a port that
	is already in use.

Implement a EXIT_ON_FAILURE #define system in case you prefer
	to handle errors gracefully without exiting.

//Fix getPortAddress so it returns a value instead of a pointer.
//	This way we don't need to declare static memory in the function.
** fixed on 25 May 1998 Keith Welker

Turn the global UART structures into pointers.  We can then allocate
	the memory in openPort and free it in closePort.  This will be useful
	for opening and closing multiple ports.

Use getBiosPortAddress instead of getPortAddress throughout the code.

Make a C++ wrap for this code!!