/* clockUnit.h  

    Written by:  Dan Stearns
    CPE 315, winter 2008

    clockUnit is a manual clock used for the simple CPE 315 labs.

    To operate this manual clock:

      r key toggles startRun signal;  it's used to initialize or reset
        other circuits.  It's put into the clockUnit as a convenience
        for designers.

      c key generates one clock pulse of duration 1000.  The number has no
        units; it's an artificial measure (simulation time) which varies from
        machine to machine.

*/

/*
   signature parmameters:
     sd   schematic descriptor
     sr   startRun signal
     c    clock signal
*/
void clockUnit(SD sd, Signal& sr, Signal& c);