diff --git a/src/mainboard/dell/e6400/acpi/ich9_pci_irqs.asl b/src/mainboard/dell/e6400/acpi/ich9_pci_irqs.asl
index 21066fbf3b..9a4cdfb75b 100644
--- a/src/mainboard/dell/e6400/acpi/ich9_pci_irqs.asl
+++ b/src/mainboard/dell/e6400/acpi/ich9_pci_irqs.asl
@@ -4,87 +4,18 @@
  * 0:1e.0 PCI bridge of the ICH9
  */
 
-/* TODO: which slots are actually relevant? */
 If (PICM) {
 	Return (Package() {
-		// PCI Slot 1 routes ABCD
-		Package() { 0x0000ffff, 0, 0, 16},
-		Package() { 0x0000ffff, 1, 0, 17},
-		Package() { 0x0000ffff, 2, 0, 18},
-		Package() { 0x0000ffff, 3, 0, 19},
-
-		// PCI Slot 2 routes BCDA
-		Package() { 0x0001ffff, 0, 0, 17},
-		Package() { 0x0001ffff, 1, 0, 18},
-		Package() { 0x0001ffff, 2, 0, 19},
-		Package() { 0x0001ffff, 3, 0, 16},
-
-		// PCI Slot 3 routes CDAB
-		Package() { 0x0002ffff, 0, 0, 18},
-		Package() { 0x0002ffff, 1, 0, 19},
-		Package() { 0x0002ffff, 2, 0, 16},
-		Package() { 0x0002ffff, 3, 0, 17},
-
-		// PCI Slot 4 routes ABCD
-		Package() { 0x0003ffff, 0, 0, 16},
-		Package() { 0x0003ffff, 1, 0, 17},
-		Package() { 0x0003ffff, 2, 0, 18},
-		Package() { 0x0003ffff, 3, 0, 19},
-
-		// PCI Slot 5 routes ABCD
-		Package() { 0x0004ffff, 0, 0, 16},
-		Package() { 0x0004ffff, 1, 0, 17},
-		Package() { 0x0004ffff, 2, 0, 18},
-		Package() { 0x0004ffff, 3, 0, 19},
-
-		// PCI Slot 6 routes BCDA
-		Package() { 0x0005ffff, 0, 0, 17},
-		Package() { 0x0005ffff, 1, 0, 18},
-		Package() { 0x0005ffff, 2, 0, 19},
-		Package() { 0x0005ffff, 3, 0, 16},
-
-		// FIXME: what's this supposed to mean? (adopted from ich7)
-		//Package() { 0x0008ffff, 0, 0, 20},
+		// PCI Device 1, Ricoh R5C847 routes DBC
+		Package() { 0x0001ffff, 0, 0, 19},
+		Package() { 0x0001ffff, 1, 0, 17},
+		Package() { 0x0001ffff, 2, 0, 18},
 	})
 } Else {
 	Return (Package() {
-		// PCI Slot 1 routes ABCD
-		Package() { 0x0000ffff, 0, \_SB.PCI0.LPCB.LNKA, 0},
-		Package() { 0x0000ffff, 1, \_SB.PCI0.LPCB.LNKB, 0},
-		Package() { 0x0000ffff, 2, \_SB.PCI0.LPCB.LNKC, 0},
-		Package() { 0x0000ffff, 3, \_SB.PCI0.LPCB.LNKD, 0},
-
-		// PCI Slot 2 routes BCDA
-		Package() { 0x0001ffff, 0, \_SB.PCI0.LPCB.LNKB, 0},
-		Package() { 0x0001ffff, 1, \_SB.PCI0.LPCB.LNKC, 0},
-		Package() { 0x0001ffff, 2, \_SB.PCI0.LPCB.LNKD, 0},
-		Package() { 0x0001ffff, 3, \_SB.PCI0.LPCB.LNKA, 0},
-
-		// PCI Slot 3 routes CDAB
-		Package() { 0x0002ffff, 0, \_SB.PCI0.LPCB.LNKC, 0},
-		Package() { 0x0002ffff, 1, \_SB.PCI0.LPCB.LNKD, 0},
-		Package() { 0x0002ffff, 2, \_SB.PCI0.LPCB.LNKA, 0},
-		Package() { 0x0002ffff, 3, \_SB.PCI0.LPCB.LNKB, 0},
-
-		// PCI Slot 4 routes ABCD
-		Package() { 0x0003ffff, 0, \_SB.PCI0.LPCB.LNKA, 0},
-		Package() { 0x0003ffff, 1, \_SB.PCI0.LPCB.LNKB, 0},
-		Package() { 0x0003ffff, 2, \_SB.PCI0.LPCB.LNKC, 0},
-		Package() { 0x0003ffff, 3, \_SB.PCI0.LPCB.LNKD, 0},
-
-		// PCI Slot 5 routes ABCD
-		Package() { 0x0004ffff, 0, \_SB.PCI0.LPCB.LNKA, 0},
-		Package() { 0x0004ffff, 1, \_SB.PCI0.LPCB.LNKB, 0},
-		Package() { 0x0004ffff, 2, \_SB.PCI0.LPCB.LNKC, 0},
-		Package() { 0x0004ffff, 3, \_SB.PCI0.LPCB.LNKD, 0},
-
-		// PCI Slot 6 routes BCDA
-		Package() { 0x0005ffff, 0, \_SB.PCI0.LPCB.LNKB, 0},
-		Package() { 0x0005ffff, 1, \_SB.PCI0.LPCB.LNKC, 0},
-		Package() { 0x0005ffff, 2, \_SB.PCI0.LPCB.LNKD, 0},
-		Package() { 0x0005ffff, 3, \_SB.PCI0.LPCB.LNKA, 0},
-
-		// FIXME
-		// Package() { 0x0008ffff, 0, \_SB.PCI0.LPCB.LNKE, 0},
+		// PCI Device 1, Ricoh R5C847 routes DBC
+		Package() { 0x0001ffff, 0, \_SB.PCI0.LPCB.LNKD, 0},
+		Package() { 0x0001ffff, 1, \_SB.PCI0.LPCB.LNKB, 0},
+		Package() { 0x0001ffff, 2, \_SB.PCI0.LPCB.LNKC, 0},
 	})
 }