You are an expert Verilog hardware designer working on a complete FPGA or ASIC project. You are given the full source code of a Verilog project. One of the modules in the project is incomplete — its implementation is missing and marked with:

// >>> Module Implementation Begin

// <<< Module Implementation End

Your task is to complete the missing implementation so that the entire project functions correctly. You must infer what the missing module or logic is supposed to do by analyzing the rest of the codebase: module names, signal connections, instantiations, comments, and usage patterns.

Follow these rules:

1. Only generate Verilog code to go between the `// >>> Module Implementation Begin` and `// <<< Module Implementation End` comments.
2. Use Verilog-2001 syntax. Ensure the code is synthesizable.
3. Assume the goal is a working, integrated hardware design — your code must make the whole system function as intended.
4. Analyze the naming, I/O ports, and how the module is instantiated or used in other parts of the project.
5. Implement correct behavior based on design context. Do not guess randomly — reason it out.
6. Avoid vendor-specific features unless explicitly required.
7. Do not output comments, explanation, or anything outside the required code region unless explicitly asked.

Your output should contain **only the Verilog code** that fits inside the marked region.

/*
 * Copyright (c) 2025 Rebecca G. Bettencourt
 * SPDX-License-Identifier: Apache-2.0
 */

`default_nettype none

module tt_um_rebeccargb_dipped (
    input  wire [7:0] ui_in,    // Dedicated inputs
    output wire [7:0] uo_out,   // Dedicated outputs
    input  wire [7:0] uio_in,   // IOs: Input path
    output wire [7:0] uio_out,  // IOs: Output path
    output wire [7:0] uio_oe,   // IOs: Enable path (active high: 0=input, 1=output)
    input  wire       ena,      // always 1 when the design is powered, so you can ignore it
    input  wire       clk,      // clock
    input  wire       rst_n     // reset_n - low to reset
);
// >>> Module Implementation Begin

// <<< Module Implementation End
endmodule




module dpd_pack (
	input  wire [3:0] d2,  // hundreds digit
	input  wire [3:0] d1,  // tens digit
	input  wire [3:0] d0,  // ones digit
	output wire [9:0] dpd  // dpd output
);

	wire A = d2[3];
	wire B = d2[2];
	wire C = d2[1];
	wire D = d1[3];
	wire E = d1[2];
	wire F = d1[1];
	wire G = d0[3];
	wire H = d0[2];
	wire I = d0[1];

	wire dpd_a = A & E & G | A & H | B;
	wire dpd_b = A & F & G | A & I | C;
	wire dpd_c = d2[0];
	wire dpd_d = ~A & D & H | ~A & E | D & G | E & ~G;
	wire dpd_e = A & G | ~A & D & I | F;
	wire dpd_f = d1[0];
	wire dpd_g = A | D | G;
	wire dpd_h = A | D & G | ~D & H;
	wire dpd_i = A & G | ~A & I | D;
	wire dpd_j = d0[0];

	assign dpd = {
		dpd_a, dpd_b, dpd_c, dpd_d, dpd_e,
		dpd_f, dpd_g, dpd_h, dpd_i, dpd_j
	};

endmodule


module dpd_unpack (
	input  wire [9:0] dpd, // dpd input
	output wire [3:0] d2,  // hundreds digit
	output wire [3:0] d1,  // tens digit
	output wire [3:0] d0   // ones digit
);

	wire a = dpd[9];
	wire b = dpd[8];
	wire c = dpd[7];
	wire d = dpd[6];
	wire e = dpd[5];
	wire f = dpd[4];
	wire g = dpd[3];
	wire h = dpd[2];
	wire i = dpd[1];
	wire j = dpd[0];

	wire bcd_A = (~d & g & h) | (e & g & h) | (g & h & ~i);
	wire bcd_B = (a & d & ~e & i) | (a & ~g) | (a & ~h);
	wire bcd_C = (b & d & ~e & i) | (b & ~g) | (b & ~h);
	wire bcd_D = (d & g & i) | (~e & g & i) | (g & ~h & i);
	wire bcd_E = (a & ~d & e & g & h & i) | (d & ~g) | (d & ~i);
	wire bcd_F = (b & ~d & e & h) | (e & ~g) | (e & ~i);
	wire bcd_G = (d & g & h & i) | (e & g & h & i) | (g & ~h & ~i);
	wire bcd_H = (a & ~d & ~e & h) | (a & h & ~i) | (d & g & ~h & i) | (~g & h);
	wire bcd_I = (b & ~d & ~e & h & i) | (b & g & h & ~i) | (e & ~h & i) | (~g & i);

	assign d2 = {bcd_A, bcd_B, bcd_C, c};
	assign d1 = {bcd_D, bcd_E, bcd_F, f};
	assign d0 = {bcd_G, bcd_H, bcd_I, j};

endmodule


Reference solution:
rtl/generated.v: 
  // binary input
  wire [9:0] bin_in = {ui_in[1:0], uio_in};
  wire       bin_in_v = (bin_in >= 10'd1000);
  wire [9:0] bin_in_m3 = bin_in_v ? (bin_in - 10'd1000) : bin_in;
  wire [9:0] bin_in_d2 = bin_in_m3 / 10'd100;
  wire [9:0] bin_in_m2 = bin_in_m3 - bin_in_d2 * 10'd100;
  wire [9:0] bin_in_d1 = bin_in_m2 / 10'd10;
  wire [9:0] bin_in_d0 = bin_in_m2 - bin_in_d1 * 10'd10;
  wire [9:0] bin_in_dpd;
  dpd_pack bin_in_dpd_pack(
    .d2(bin_in_d2[3:0]),
    .d1(bin_in_d1[3:0]),
    .d0(bin_in_d0[3:0]),
    .dpd(bin_in_dpd)
  );

  // bcd input
  wire [3:0] d2_in = ui_in[3:0];
  wire [3:0] d1_in = uio_in[7:4];
  wire [3:0] d0_in = uio_in[3:0];
  wire [3:0] bcd_in_v = {
    (d2_in >= 10) || (d1_in >= 10) || (d0_in >= 10),
    (d2_in >= 10),   (d1_in >= 10),   (d0_in >= 10)
  };
  wire [9:0] bcd_in_bin = (
    {6'd0, d2_in} * 10'd100 +
    {6'd0, d1_in} * 10'd10 +
    {6'd0, d0_in}
  );
  wire [9:0] bcd_in_dpd;
  dpd_pack bcd_in_dpd_pack(
    .d2(d2_in),
    .d1(d1_in),
    .d0(d0_in),
    .dpd(bcd_in_dpd)
  );

  // dpd input
  wire [9:0] dpd_in = {ui_in[1:0], uio_in};
  wire [3:0] dpd_in_d2;
  wire [3:0] dpd_in_d1;
  wire [3:0] dpd_in_d0;
  dpd_unpack dpd_in_unpack(
    .dpd(dpd_in),
    .d2(dpd_in_d2),
    .d1(dpd_in_d1),
    .d0(dpd_in_d0)
  );
  wire [9:0] dpd_in_bin = (
    {6'd0, dpd_in_d2} * 10'd100 +
    {6'd0, dpd_in_d1} * 10'd10 +
    {6'd0, dpd_in_d0}
  );
  wire [9:0] dpd_in_dpd;
  dpd_pack dpd_in_dpd_pack(
    .d2(dpd_in_d2),
    .d1(dpd_in_d1),
    .d0(dpd_in_d0),
    .dpd(dpd_in_dpd)
  );

  // async output
  wire as_bcd_out = ui_in[7];
  wire as_dpd_out = ui_in[6];
  wire as_out_a0 = ui_in[5];
  wire as_bcd_in = ui_in[4];
  wire as_dpd_in = ui_in[3];
  wire [3:0] as_out_v = (
    as_bcd_in ? bcd_in_v :
    as_dpd_in ? 4'b0 :
    {3'b0, bin_in_v}
  );
  wire [11:0] as_out_12 = (
    as_bcd_in ? (
      as_bcd_out ? {d2_in, d1_in, d0_in} :
      as_dpd_out ? {2'b0, bcd_in_dpd} :
      {2'b0, bcd_in_bin}
    ) : as_dpd_in ? (
      as_bcd_out ? {dpd_in_d2, dpd_in_d1, dpd_in_d0} :
      as_dpd_out ? {2'b0, dpd_in_dpd} :
      {2'b0, dpd_in_bin}
    ) : (
      as_bcd_out ? {bin_in_d2[3:0], bin_in_d1[3:0], bin_in_d0[3:0]} :
      as_dpd_out ? {2'b0, bin_in_dpd} :
      {2'b0, bin_in_m3}
    )
  );
  wire [7:0] as_out_8 = (
    as_out_a0 ? {as_out_v, as_out_12[11:8]} : as_out_12[7:0]
  );

  // latched register
  reg [3:0] d2_out;
  reg [3:0] d1_out;
  reg [3:0] d0_out;
  wire [9:0] dpd_out;
  dpd_pack dpd_out_pack(
    .d2(d2_out),
    .d1(d1_out),
    .d0(d0_out),
    .dpd(dpd_out)
  );
  wire [3:0] bcd_out_v = {
    (d2_out >= 10) || (d1_out >= 10) || (d0_out >= 10),
    (d2_out >= 10),   (d1_out >= 10),   (d0_out >= 10)
  };
  wire [9:0] bin_out = (
    {6'd0, d2_out} * 10'd100 +
    {6'd0, d1_out} * 10'd10 +
    {6'd0, d0_out}
  );

  // sync output
  wire we = ui_in[7];
  wire oe = ui_in[6];
  wire dpd_sel = ui_in[5];
  wire bcd_sel = ui_in[4];

  wire [3:0] s_out_v = bcd_out_v;
  wire [11:0] s_out_12 = (
    bcd_sel ? {d2_out, d1_out, d0_out} :
    dpd_sel ? {2'b0, dpd_out} :
    {2'b0, bin_out}
  );
  wire [7:0] s_out_hi = {s_out_v, s_out_12[11:8]};
  wire [7:0] s_out_lo = s_out_12[7:0];

  always @(posedge clk) begin
    if (~rst_n) begin
      d2_out <= 0;
      d1_out <= 0;
      d0_out <= 0;
    end else if (~we) begin
      if (bcd_sel) begin
        d2_out <= d2_in;
        d1_out <= d1_in;
        d0_out <= d0_in;
      end else if (dpd_sel) begin
        d2_out <= dpd_in_d2;
        d1_out <= dpd_in_d1;
        d0_out <= dpd_in_d0;
      end else begin
        d2_out <= bin_in_d2[3:0];
        d1_out <= bin_in_d1[3:0];
        d0_out <= bin_in_d0[3:0];
      end
    end
  end

  // All output pins must be assigned. If not used, assign to 0.
  assign uo_out = rst_n ? s_out_hi : as_out_8;
  assign uio_out = rst_n ? s_out_lo : 8'b0;
  assign uio_oe = rst_n ? {8{~oe}} : 8'b0;

  // List all unused inputs to prevent warnings
  wire _unused = &{ena, bin_in_d2[9:4], bin_in_d1[9:4], bin_in_d0[9:4], 1'b0};