The following chart gives a brief description of the Exec functions that
control task signalling.  See the Amiga ROM Kernel Reference Manual:
Includes and Autodocs for details about each call.


                    Table 22-1: Exec Signal Functions
  _______________________________________________________________________
 |                                                                       |
 |   Exec Signal                                                         |
 |    Function                         Description                       |
 |=======================================================================|
 |  allocsignal()  allocate a signal bit.                                |
 |   freesignal()  free a signal bit allocated with allocsignal().       |
 |    setsignal()  query or set the state of the signals for the current |
 |                 task.                                                 |
 |       signal()  signal a task by setting signal bits in its task      |
 |                 structure.                                            |
 |         wait()  wait for one or more signals from other tasks or      |
 |                 interrupts.                                           |
 |_______________________________________________________________________|