#define Txbuf	  0x00	   /* tx buffer */
#define Rxbuf	  0x00	   /* rx buffer */
#define Dll	  0x00	   /* baud lsb */
#define Dlh	  0x01	   /* baud msb */
#define Ier	  0x01	   /* int enable reg */
#define Fcr	  0x02	   /* FIFO control register */
#define Iir       0x02     /* Interrupt Identification Register */
#define Lcr	  0x03	   /* line control reg */
#define Dfr	  0x03	   /* Data format  reg */
#define Mcr	  0x04	   /* modem control reg */
#define Lsr	  0x05	   /* line status reg */
#define Msr	  0x06	   /* modem status reg */
#define Scr	  0x07	   /* Scratch reg */

#define NoError         0
#define PortError      -1
#define DataError      -2
#define ParityError    -3
#define StopError      -4
#define TimeOut        -5
#define QueueEmpty     -6
#define QueueOverflow  -7
#define BaudRateError  -13
#define CheckSumError  -14

int _InstallCom1(unsigned long lBaudRate,int iData,int iParity,int iStop);
int _RestoreCom1(void);
int _IsCom1(void);
int _ToCom1(char data);
int _ReadCom1(void);
int _ClearCom1(void);
void _ToCom1Str(char *str);