IT87_REG_TEMP_HIGH
reg = IT87_REG_TEMP_HIGH(nr);
reg = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
it87_read_value(data, IT87_REG_TEMP_HIGH(i));