I read the manual!

For bit variable:

bit test1; /*this is a bit variable */

The bit is boolean which means it can equal 0 or 1.



/* Example interrupt handler for the timer */
interrupt [11] void timer_int(void)
{
rtime++;
P0.1 ^=1; /* toggle port 0 bit */
}

If you had trouble with these issues, then you're going to have a lot more soon! Best be reading the manual first.