void write_byte(unsigned char data1);
unsigned char read_byte(void);
unsigned char read_mainmemory(unsigned int pagenum,unsigned int bits);
unsigned char read_status(void);
void shift_data(unsigned char data3);void DELAY(void);
void CLOCK1(void);
void compare_buffer1page(unsigned int pagenum);
void read_startarry(unsigned int pagenum,unsigned int bitnum,
                    unsigned char *pt,unsigned int len);
void write_buffer2mainmemory(unsigned int pagenum);
void write_buffer1mainmemory(unsigned int pagenum);
void write_buffer2(unsigned int bitnum,unsigned char *pt);
void write_mainmemory(unsigned int pagenum,unsigned char *pt);
void write_buffer1(unsigned int bitnum,unsigned char *pt);