module register_file_tb; reg clk; reg [4:0] read_reg1; reg [4:0] read_reg2; reg [4:0] write_reg; reg [31:0] write_data; reg write_enable; wire [31:0] read_data1; wire [31:0] read_data2; register_file reg_file(clk, read_reg1, read_reg2, write_reg, write_data, write_enable, read_data1, read_data2); initial begin clk = 0; read_reg1 = 0; read_reg2 = 0; write_reg = 0; write_data = 0; write_enable = 0; #10; write_enable = 1; write_data = 32'hdeadbeef; write_reg = 0; #10; write_enable = 0; read_reg1 = 0; // read from register 0 read_reg2 = 1; // read from register 1 #10; $display("read_data1 = %h", read_data1); $display("read_data2 = %h", read_data2); #10; $finish; end always begin #5; clk = ~clk; end endmodule