int test_eeprom(void)
{
    u_int8  buf[PAGE_SIZE];
    u_int8  answer[MEMORY_SIZE];
    int     i;
    int     start_address;
    int     error_code;

    printf ("Checking EEPROM page write\n");
    for (start_address = 0; start_address < MEMORY_SIZE; start_address += PAGE_SIZE) {
        for (i=0; i < PAGE_SIZE; i++) {
            buf[i] = i + start_address;
        }
        if (error_code = write_eeprom_sector(start_address, buf, PAGE_SIZE)){
            printf ("start address = %d  ", start_address);
            return error_code;
        }
    }
    printf ("Checking EEPROM read\n");
    if (error_code = check_eeprom_data(0)) return error_code;

    printf ("Checking EEPROM byte write\n");
    for (start_address = MEMORY_SIZE-1; start_address >= 0; start_address--) {
        buf[0] = start_address + 128;
        if (error_code = write_eeprom_sector(start_address, buf, 1)){
            printf ("address = %d  ", start_address);
            return error_code;
        }
    }
    printf ("Checking EEPROM read\n");
    if (error_code = check_eeprom_data(128)) return error_code;
    
    return 0;
}