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Apr 20th, 2018
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  1. MODULE combolck
  2.     combolck    device 'P20v8'
  3.  
  4.     A, B, CLOCK     pin ;
  5.     UNLK, HINT      pin istype 'com';
  6.     Q1, Q2, Q3      pin istype 'reg';
  7.    
  8.    
  9. EQUATIONS
  10.  
  11.     Q1.CLK = CLOCK;
  12.     Q2.CLK = CLOCK;
  13.     Q3.CLK = CLOCK;
  14.    
  15.     Q1 := (Q1 & !Q2 & X # !Q1 & Q2 & Q3 & !X) # (Q1 & Q2 & !Q3);
  16.     Q2 := (!Q2 & Q3 & X # Q2 & !Q3 & X);
  17.     Q3 := (Q1 & !Q2 & !Q3 # Q1 & Q3 & !X) # (!Q2 & !X) # (!Q3 & !Q1 & !X) # (Q2 & !Q3 & X);
  18.    
  19.     UNLK = (Q1 & Q2 & Q3 & !X);
  20.     HINT = (!Q1 & !Q2 & !Q3 & !X) # (Q1 & !Q2 & X) # (!Q2 & Q3 & X) # (Q2 & Q3 & !X) # (Q2 & !Q3 & X);
  21.    
  22. END
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