Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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MODIFY THIS VERILOG CODE. THE OUTPUT OF THE QA,QB & QC (that will be seen on gtkwave) SHOULD BE:

qa qb qc

0 1 0

0 1 1

0 1 1

1 0 0

1 0 0

0 0 1

1 0 1

1 0 1

0 0 1

 

module finals_nake(in, clk, qa, qb, qc);
  input in, clk;
  output qa, qb, qc;
  wire ja, jb, jc, ka, kb, kc;

  // Negated inputs
  wire in_n, clk_n;
  assign in_n = ~in;
  assign clk_n = ~clk;

  // JK equations based on provided equations
  assign ja = (qb & ~qc & ~in) | (qb & qc & in);
  assign ka = clk & clk;
  assign jb = (~qa & ~qc & ~in) | (~qa & qc & in);
  assign kb = qa | (~qc & ~in) | (qc & in);
  assign jc = (~qc & ~in) | (~qc & in);
  assign kc = clk & clk;

  //jka
  wire jka1, jka2, jka3, jka4;
  assign jka1 = ~(jka4 & ja);
  assign jka2 = ~(jka3 & ka);
  assign jka3 = ~(jka1 & jka4);
  assign jka4 = ~(jka2 & jka3);
  assign qa = jka3;

  //jkb
  wire jkb1, jkb2, jkb3, jkb4;
  assign jkb1 = ~(jkb4 & jb);
  assign jkb2 = ~(jkb3 & kb);
  assign jkb3 = ~(jkb1 & jkb4);
  assign jkb4 = ~(jkb2 & jkb3);
  assign qb = jkb3;

  //jkc
  wire jkc1, jkc2, jkc3, jkc4;
  assign jkc1 = ~(jkc4 & jc);
  assign jkc2 = ~(jkc3 & kc);
  assign jkc3 = ~(jkc1 & jkc4);
  assign jkc4 = ~(jkc2 & jkc3);
  assign qc = jkc3;

endmodule

module finals_nake_tb();
  reg in, clk;
  wire qa, qb, qc;

  finals_nake finals_nake_ins(in, clk, qa, qb, qc);

  initial
    begin
      in = 0; clk = 0;
      #10 in = 0; clk = 1;
      #10 in = 0; clk = 0;
      #10 in = 0; clk = 1;
      #10 in = 0; clk = 0;
      #10 in = 0; clk = 1;
      #10 in = 0; clk = 0;
      #10 in = 0; clk = 1;
      #10 in = 0; clk = 0;
      #10 in = 0; clk = 1;
      #10 in = 0; clk = 0;
      #10 in = 1; clk = 1;
      #10 in = 1; clk = 0;
      #10 in = 1; clk = 1;
      #10 in = 1; clk = 0;
      #10 in = 1; clk = 1;
      #10 in = 1; clk = 0;
      #10 in = 1; clk = 1;
      #10 in = 1; clk = 0;
      #10 in = 1; clk = 1;
      #10 in = 1; clk = 0;
      #10 in = 1; clk = 1;
      #10 in = 0; clk = 0;
    end

  initial
    begin
      $dumpfile("finals_nake_ins.vcd");
      $dumpvars();
      $finish;
    end

endmodule

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