X-Git-Url: http://git.joshuawise.com/firearm.git/blobdiff_plain/90bdd4a8174c0c08e132836696b5961c921b3206..fccd83f9981656ec548e7c5534dc2b847f875dda:/BigBlockRAM.v

diff --git a/BigBlockRAM.v b/BigBlockRAM.v
index b8ccbff..7b8275a 100644
--- a/BigBlockRAM.v
+++ b/BigBlockRAM.v
@@ -10,16 +10,17 @@ module BigBlockRAM(
 	
 	/* This module is mapped in physical memory from 0x00000000 to
 	 * 0x00800000.  rdata and ready must be driven to zero if the
-	 * address is not within the range of this module.
+	 * address is not within the range of this module.  There also
+	 * exists a shadow up at 0x80000000.
 	 */
-	wire decode = bus_addr[31:23] == 9'b0;
+	wire decode = bus_addr[30:23] == 8'b0;
 	wire [22:0] ramaddr = {bus_addr[22:2], 2'b0};	/* mask off lower two bits
 							 * for word alignment */
 
 	reg [31:0] data [((8*1024*1024) / 4 - 1):0];
 	
 	reg [31:0] temprdata = 0;
-	reg [22:0] lastread = 23'h7FFFFFFF;
+	reg [22:0] lastread = 23'h7FFFFF;
 	assign bus_rdata = (bus_rd && decode) ? temprdata : 32'h0;
 	
 	assign bus_ready = decode &&