diff --git a/hash/nes.xml b/hash/nes.xml
index 7d6f3fdaeeb..b22b8ddb465 100644
--- a/hash/nes.xml
+++ b/hash/nes.xml
@@ -1719,6 +1719,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="32768">
+				<rom value="0x00" size="32768" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 1k Internal RAM in the MMC5 chip (ExRAM) -->
 			<dataarea name="mapper_ram" size="1024">
@@ -2772,6 +2773,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 8k WRAM on cartridge -->
 			<dataarea name="wram" size="8192">
@@ -7636,6 +7638,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 8k WRAM on cartridge -->
 			<dataarea name="wram" size="8192">
@@ -14037,6 +14040,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 1k Internal RAM in the MMC5 chip (ExRAM) -->
 			<dataarea name="mapper_ram" size="1024">
@@ -18018,6 +18022,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 8k WRAM on cartridge -->
 			<dataarea name="wram" size="8192">
@@ -18995,6 +19000,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 1k Internal RAM in the MMC5 chip (ExRAM) -->
 			<dataarea name="mapper_ram" size="1024">
@@ -20912,6 +20918,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 8k WRAM on cartridge -->
 			<dataarea name="wram" size="8192">
@@ -20940,6 +20947,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 8k WRAM on cartridge -->
 			<dataarea name="wram" size="8192">
@@ -26672,6 +26680,7 @@
 			</dataarea>
 			<!-- 32k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="32768">
+				<rom value="0x00" size="32768" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 1k Internal RAM in the MMC5 chip (ExRAM) -->
 			<dataarea name="mapper_ram" size="1024">
@@ -26697,6 +26706,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 8k WRAM on cartridge -->
 			<dataarea name="wram" size="8192">
@@ -26777,6 +26787,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 8k WRAM on cartridge -->
 			<dataarea name="wram" size="8192">
@@ -31151,6 +31162,7 @@
 			</dataarea>
 			<!-- 32k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="32768">
+				<rom value="0x00" size="32768" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 1k Internal RAM in the MMC5 chip (ExRAM) -->
 			<dataarea name="mapper_ram" size="1024">
@@ -31921,6 +31933,7 @@
 			</dataarea>
 			<!-- 32k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="32768">
+				<rom value="0x00" size="32768" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 1k Internal RAM in the MMC5 chip (ExRAM) -->
 			<dataarea name="mapper_ram" size="1024">
@@ -31946,6 +31959,7 @@
 			</dataarea>
 			<!-- 32k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="32768">
+				<rom value="0x00" size="32768" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 1k Internal RAM in the MMC5 chip (ExRAM) -->
 			<dataarea name="mapper_ram" size="1024">
@@ -32943,6 +32957,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 1k Internal RAM in the MMC5 chip (ExRAM) -->
 			<dataarea name="mapper_ram" size="1024">
@@ -35510,6 +35525,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 8k WRAM on cartridge -->
 			<dataarea name="wram" size="8192">
@@ -40348,6 +40364,7 @@
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 8k WRAM on cartridge -->
 			<dataarea name="wram" size="8192">
@@ -43307,6 +43324,7 @@ We should eventually add it to MESS as a separate driver with a NES CPU and a GB
 			</dataarea>
 			<!-- 32k WRAM on cartridge (or 40k? readme mentions 5x16k srams!) no batteries? -->
 			<dataarea name="bwram" size="32768">
+				<rom value="0x00" size="32768" offset="0" loadflag="fill" />
 			</dataarea>
 			<dataarea name="wram" size="8192">
 			</dataarea>
@@ -47840,6 +47858,7 @@ preliminary proto for the PAL version, still running on NTSC systems) or the gfx
 			</dataarea>
 			<!-- 8k WRAM on cartridge, battery backed up -->
 			<dataarea name="bwram" size="8192">
+				<rom value="0x00" size="8192" offset="0" loadflag="fill" />
 			</dataarea>
 			<!-- 8k WRAM on cartridge -->
 			<dataarea name="wram" size="8192">