diff --git a/src/northbridge/intel/e7501/raminit.h b/src/northbridge/intel/e7501/raminit.h
index c1dc4baeaf..4f783b8cd7 100644
--- a/src/northbridge/intel/e7501/raminit.h
+++ b/src/northbridge/intel/e7501/raminit.h
@@ -1,11 +1,18 @@
 #ifndef RAMINIT_H
 #define RAMINIT_H
 
-#define DIMM_SOCKETS 4
+#define MAX_DIMM_SOCKETS_PER_CHANNEL 4
+#define MAX_NUM_CHANNELS 2
+#define MAX_DIMM_SOCKETS (MAX_NUM_CHANNELS * MAX_DIMM_SOCKETS_PER_CHANNEL)
+
 struct mem_controller {
-	device_t d0, d0f1; 
-	uint16_t channel0[DIMM_SOCKETS];
-	uint16_t channel1[DIMM_SOCKETS];
+	device_t d0, d0f1;					// PCI bus/device/fcns of E7501 memory controller 
+
+	// SMBus addresses of DIMM slots for each channel,
+	// in order from closest to MCH to furthest away
+	// 0 == not present
+	uint16_t channel0[MAX_DIMM_SOCKETS_PER_CHANNEL];	
+	uint16_t channel1[MAX_DIMM_SOCKETS_PER_CHANNEL];
 };