try to implement comb_mem

1 files changed, 53 insertions, 0 deletions

diff --git a/nandgame/comb_mem_tb.sv b/nandgame/comb_mem_tb.sv
new file mode 100644
index 0000000..66a5e64
--- /dev/null
+++ b/nandgame/comb_mem_tb.sv
@@ -0,0 +1,53 @@
+`timescale 1us/1us
+
+module comb_mem_tb;
+
+reg clk_i;
+logic wa, wd, wpa;
+logic [15:0] o_a, o_d, o_pa;
+logic [15:0] X;
+
+comb_mem uut (
+  .cl(clk_i),
+  .a_i(wa),
+  .d_i(wd),
+  .pa_i(wpa),
+  .A_o(o_a),
+  .D_o(o_d),
+  .pA_o(o_pa),
+  .X(X)
+);
+
+string filename;
+initial begin
+`ifdef DUMP_FILE_NAME
+  filename=`DUMP_FILE_NAME;
+`else
+  filename="comb_mem.lxt2";
+`endif
+  $dumpfile(filename);
+  $dumpvars();
+  clk_i = 0;
+  wa = 0; wd = 0; wpa = 0;
+  X = 16'h55;
+end
+
+always #10 clk_i = ~clk_i;
+
+initial begin
+
+  repeat(3) @(posedge clk_i);
+  wa = 1;
+  repeat(3) @(posedge clk_i);
+  wa = 0;
+  wd = 1;
+  repeat(3) @(posedge clk_i);
+  wd = 0;
+  wpa = 1;
+  X = 16'haa;
+  repeat(3) @(posedge clk_i);
+
+  $finish();
+end
+
+endmodule