X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/68ce013e5fe7c5d1c4e07fe8ba1eb0ba2855b280..a8f4468d0cd6910eba8031e21038d76857a2c107:/Interrupt.v

diff --git a/Interrupt.v b/Interrupt.v
index fcc396b..2686146 100644
--- a/Interrupt.v
+++ b/Interrupt.v
@@ -19,10 +19,13 @@ module Interrupt(
 	reg [7:0] imask = 16'hFFFF;
 	reg [7:0] ihold = 8'b0;
 	wire [7:0] imasked = ihold & imask;
+	
+	reg rdlatch = 0;
+	reg [15:0] addrlatch = 0;
 
-	assign data = rd ?
-	                 (addr == `ADDR_IF) ? ihold :
-	                 (addr == `ADDR_IE) ? imask :
+	assign data = rdlatch ?
+	                 (addrlatch == `ADDR_IF) ? ihold :
+	                 (addrlatch == `ADDR_IE) ? imask :
 	                 8'bzzzzzzzz :
 		      8'bzzzzzzzz;
 
@@ -45,6 +48,8 @@ module Interrupt(
 		end
 		else
 			ihold <= ihold | iflag;
+		rdlatch <= rd;
+		addrlatch <= addr;
 	end
 
 endmodule