X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/68ce013e5fe7c5d1c4e07fe8ba1eb0ba2855b280..f8c46ff554cb7f4c067eab1234faf729118c4c25:/Sound1.v

diff --git a/Sound1.v b/Sound1.v
index 21b1dec..ca97b17 100644
--- a/Sound1.v
+++ b/Sound1.v
@@ -23,18 +23,23 @@ module Sound1(
 	reg [3:0] delta = 4'b1111;
 	reg toggle = 0;
 	reg [3:0] snd_out = 0;
+	
+	reg rdlatch;
+	reg [15:0] addrlatch;
 
 	assign snd_data = en ? snd_out : 0;
 
-	assign data = rd ?
-	                 addr == `ADDR_NR10 ? nr10 :
-	                 addr == `ADDR_NR11 ? nr11 :
-	                 addr == `ADDR_NR12 ? nr12 :
-	                 addr == `ADDR_NR13 ? nr13 :
-	                 addr == `ADDR_NR14 ? nr14 : 8'bzzzzzzzz
+	assign data = rdlatch ?
+	                 addrlatch == `ADDR_NR10 ? nr10 :
+	                 addrlatch == `ADDR_NR11 ? nr11 :
+	                 addrlatch == `ADDR_NR12 ? nr12 :
+	                 addrlatch == `ADDR_NR13 ? nr13 :
+	                 addrlatch == `ADDR_NR14 ? nr14 : 8'bzzzzzzzz
 	              : 8'bzzzzzzzz;
 
 	always @ (posedge core_clk) begin
+		rdlatch <= rd;
+		addrlatch <= addr;
 		if(en && wr) begin
 			case(addr)
 			`ADDR_NR10: nr10 <= data;