diff --git a/src/driver/PCI.pas b/src/driver/PCI.pas
index 43e38235..450a4b4a 100644
--- a/src/driver/PCI.pas
+++ b/src/driver/PCI.pas
@@ -244,13 +244,12 @@ var
     ii : uint16;
 begin
     //enumerate pci bus 
-    for ii:=0 to 32 do begin
-        for i:=0 to 256 do begin
+    for ii:=0 to 256 do begin
+        for i:=0 to 31 do begin
             check_device(ii, i);
         end;
     end;
 
-    //TODO while there are unchecked nested busses, check nested busses
 end;
 
 procedure loadConfig(bus : uint8; slot : uint8; func : uint8; offset : uint8);
@@ -277,7 +276,7 @@ begin
     if vendor_id = $FFFF then exit;
 
     isDeviceb := isDevice(bus, device, 0, 8);
-    if isDeviceb >= 0 then begin 
+    if isDeviceb = 1 then begin 
         devices[device_count] := read_device_config(bus, device, 0, 0);
         device_count := device_count + 1;
         check_device := true;