Regarding a random number generator for a pic you may wish to try
   the following algorithm.  It is not truely random but it will produce
   what at least looks random.

   Take an 8 bit array with bit 7=msb and bit 0=lsb.

   1) Assign a variable bit1=array(0) .xor. array(1)
   2) Assign a variable bit2=array(6) .xor. array(7)
   3) Assign a variable bit3=bit1 .xor. bit2
   4) Rotate the array one to the right.
   5) Assign array(7)=bit3
   6) Goto 1

   This algorithm requires an initial seed located in array.  The
   output of the random number generator will be in array.


                                                Bob