#define	B0		0
#define B50		1
#define	B75		2
#define	B110	3
#define B134	4
#define	B150	5
#define	B200	6
#define	B300	7
#define	B600	8
#define	B1200	9
#define	B1800	10
#define	B2400	11
#define	B4800	12
#define	B9600	13
#define EXTA	14
#define	EXTB	15