public link unit map {} = driver.map;
public link bit AreaNumber = driver.AreaNumber;
public link bit LineNumber = driver.LineNumber;
public link bit BackData = driver.BackData;
public link bit ClearData = driver.ClearData;
public link void OS_init(){} = driver.OS_init;
public link void Clear(){} = driver.clear;
public link void PrintLine(bit n1,bit n2,bit n3){} = driver.print_line;
