convert_to_16bit
gusaddr = convert_to_16bit(gusaddr);
start = convert_to_16bit(start-1);
current = convert_to_16bit(current);
end = convert_to_16bit(end);
addr = convert_to_16bit(addr);
addr = convert_to_16bit(addr);
u_long convert_to_16bit(u_long);