diff --git a/src/mainboard/bcm/e100/irq_tables.c b/src/mainboard/bcm/e100/irq_tables.c
index dbad0c3c68..57302bebf1 100644
--- a/src/mainboard/bcm/e100/irq_tables.c
+++ b/src/mainboard/bcm/e100/irq_tables.c
@@ -1,10 +1,10 @@
 #include <arch/pirq_routing.h>
 
-#define CHECKSUM 0x22
+#define CHECKSUM 0x26
 const struct irq_routing_table intel_irq_routing_table = {
 	PIRQ_SIGNATURE,	/* u32 signature */
 	PIRQ_VERSION,	/* u16 version   */
-	32+16*4,	/* there can be total 6 devices on the bus */
+	32+16*6,	/* there can be total 6 devices on the bus */
 	0x00,		/* Bus 0 */
 	0x08,		/* Device 1, Function 0 */
 	0x0C20,		/* reserve IRQ 11, 10, 5, for PCI */
@@ -25,7 +25,7 @@ const struct irq_routing_table intel_irq_routing_table = {
 		 0x00, 0x00},
 		{0x00, 0x10, {{0x41, 0xdef8}, {0x42, 0xdef8}, {0x43, 0xdef8}, {0x44, 0xdef8}},
 		 0x00, 0x00},
-		{0x00, 0x0a, {{0x41, 0xdef8}, {0x42, 0xdef8}, {0x43, 0xdef8}, {0x44, 0xdef8}},
+		{0x00, 0x08, {{0x41, 0xdef8}, {0x42, 0xdef8}, {0x43, 0xdef8}, {0x44, 0xdef8}},
 		 0x00, 0x00},
 	}
 };
diff --git a/src/mainboard/bcm/e100/mainboard.c b/src/mainboard/bcm/e100/mainboard.c
index 0d5b51e0f2..e54adc9825 100644
--- a/src/mainboard/bcm/e100/mainboard.c
+++ b/src/mainboard/bcm/e100/mainboard.c
@@ -215,9 +215,8 @@ mainboard_fixup(void)
 
 	pcidev = pci_find_device(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, (void *)NULL);
 	pci_read_config_word(pcidev, 0x74, &acpibase);
-
-	pci_read_config_byte(pcidev, 0x7c, &data);
-	pci_write_config_byte(pcidev, 0x7c, data | 0x02);
+	/* Flash can not be flashed, enable USB device in undocumented Bit 6 */
+	pci_write_config_byte(pcidev, 0x45, 0xA0);
 
 	led_on(10);
 
diff --git a/util/config/bcm-e100.config b/util/config/bcm-e100.config
index 38219f8e4c..888b2aa65b 100644
--- a/util/config/bcm-e100.config
+++ b/util/config/bcm-e100.config
@@ -21,6 +21,9 @@ docipl mainboard/bcm/e100/ipl.S
 # Use the internal VGA frame buffer device
 option HAVE_FRAMEBUFFER
 
+# Disable Some Internal PCI device
+option DISABLE_INTERNAL_DEVICES
+
 # use ELF Loader to load Etherboot
 option USE_ELF_BOOT=1