COMMAND NAME:

        PERIOD

USAGE:
        PERIOD value

        Sets the global clock period to the specified number of
        nanoseconds.  If the specified period is too small, a
        warning is given.  The SCL built-in variable C is 
        automatically set to the specified clock period in ticks.

EXAMPLE:
        /* the resolution in the following example is 0.1 */
        sim> PERIOD 200
        clock period set to 200.00ns
        sim> RADIX 10
        radix set to 10
        sim> PRINT C
        2000
        sim> SIMULATE 16 * C  /* simulates for 10 clocks (32000 ticks) */

