ex2_extern.h

基于摩托罗拉S12标准源程序 包括：SCIO,Timer

typedef unsigned char  byte;
typedef struct{
                int quot;
                int rem;
                }div_t;

#ifdef BANKED
#pragma CODE_SEG CodeForcedToPPage33								 
#else
#pragma CODE_SEG DEFAULT
#endif

//utility.c
void init_timer(void);
void init_system(void);
void init_SCI0(void); 
void tx_char0(char data);
void printf0(char *str);
void delay1(void);
div_t int_div( int num, int denum);
void hex_clk_dec(unsigned char data);