diff -pruN uniata-0.41b5/driver/id_ata.cpp uniata-0.41b5-nowarn/driver/id_ata.cpp
--- uniata-0.41b5/driver/id_ata.cpp	2012-06-29 00:46:08 +0200
+++ uniata-0.41b5-nowarn/driver/id_ata.cpp	2012-07-09 13:23:40 +0200
@@ -3732,7 +3732,7 @@ AtapiCheckInterrupt__(
 {
     PHW_DEVICE_EXTENSION deviceExtension = (PHW_DEVICE_EXTENSION)HwDeviceExtension;
     PHW_CHANNEL chan = &(deviceExtension->chan[c]);
-    PHW_LU_EXTENSION LunExt;
+    PHW_LU_EXTENSION LunExt = chan->lun[chan->cur_cdev];
 
     ULONG VendorID  = deviceExtension->DevID & 0xffff;
     ULONG ChipType  = deviceExtension->HwFlags & CHIPTYPE_MASK;
@@ -3976,7 +3976,6 @@ AtapiCheckInterrupt__(
     }
 check_unknown:
     KdPrint2((PRINT_PREFIX "  perform generic check\n"));
-    LunExt = chan->lun[chan->cur_cdev];
     if (DmaTransfer) {
         if (!((dma_status = GetDmaStatus(deviceExtension, lChannel)) & BM_STATUS_INTR)) {
             KdPrint2((PRINT_PREFIX "  DmaTransfer + !BM_STATUS_INTR (%x)\n", dma_status));
diff -pruN uniata-0.41b5/driver/id_init.cpp uniata-0.41b5-nowarn/driver/id_init.cpp
--- uniata-0.41b5/driver/id_init.cpp	2012-06-28 14:49:16 +0200
+++ uniata-0.41b5-nowarn/driver/id_init.cpp	2012-07-09 13:23:47 +0200
@@ -1020,6 +1020,7 @@ for_ugly_chips:
             /* if BAR(5) is IO it should point to SATA interface registers */
             if(deviceExtension->DevID == 0x28288086 &&
                 pciData->u.type0.SubVendorID == 0x106b) {
+                BaseMemAddress = 0;
                 KdPrint2((PRINT_PREFIX "Ignore BAR5 on ICH8M Apples\n"));
             } else {
 	        /* Skip BAR(5) on ICH8M Apples, system locks up on access. */