extract test rom into its own module

1 files changed, 45 insertions, 0 deletions

diff --git a/testROM.v b/testROM.v
new file mode 100644
index 0000000..e528f99
--- /dev/null
+++ b/testROM.v
@@ -0,0 +1,45 @@
+module testROM (
+	input clk,
+	
+	output needWait_o,
+	input [15:0] addr_i,
+	input re_i,
+	inout [15:0] data_io
+);
+
+	reg read_finished;
+	reg [15:0] romData;
+
+	assign needWait_o = re_i & !read_finished;
+	assign data_io = re_i ? romData : 16'hZZZZ;
+
+	initial begin
+		read_finished = 1'b0;
+		romData = 16'h0;
+	end
+
+	always @(posedge clk) begin
+		if(re_i) begin
+			read_finished <= 1'b1;
+
+			case(addr_i[15:1])
+				15'h0: romData <= 16'h0BB6;
+				15'h1: romData <= 16'h0102;
+				15'h2: romData <= 16'h0326;
+				15'h3: romData <= 16'h054A;
+				15'h4: romData <= 16'h5201;
+				15'h5: romData <= 16'h540A;
+				15'h6: romData <= 16'h0AA0;
+				15'h7: romData <= 16'h0004;
+				15'h8: romData <= 16'h0809;
+				15'h9: romData <= 16'h6AFA;
+				15'hA: romData <= 16'h6E00;
+				default: romData <= 16'b1111_000000000000;		// nop
+			endcase
+		end
+		else begin
+			read_finished <= 1'b0;
+		end
+	end
+
+endmodule