diff --git a/Ample/Slot.h b/Ample/Slot.h
index dee2c1f..7e94492 100644
--- a/Ample/Slot.h
+++ b/Ample/Slot.h
@@ -15,6 +15,12 @@
 @class Slot, SlotOption, SlotTableCellView;
 
 
+typedef enum SlotType {
+    kSlotRAM = 1,
+    kSlotBIOS,
+    kSlotFDC,
+} SlotType;
+
 @interface Slot : NSObject<NSCopying>
 
 @property NSInteger defaultIndex;
@@ -24,6 +30,7 @@
 @property (readonly) NSString *name;
 @property (readonly) NSString *title;
 @property (readonly) NSArray *menuItems;
+@property (readonly) SlotType type;
 
 @property (readonly) SlotOption *selectedItem;
 @property (readonly) NSString *selectedValue;
diff --git a/Ample/Slot.m b/Ample/Slot.m
index 4b7bb22..5edf8d5 100644
--- a/Ample/Slot.m
+++ b/Ample/Slot.m
@@ -72,6 +72,18 @@ static NSArray *DeepCopyArray(NSArray *src) {
 
 @implementation Slot
 
+@synthesize type = _type;
+
+
+static NSDictionary *TypeMap = nil;
+
++(void)load {
+  TypeMap = @{
+      @"ramsize": @(kSlotRAM),
+      @"smartport": @(kSlotFDC),
+      @"bios": @(kSlotBIOS),
+  };
+}
 
 -(void)reset {
     [self setSelectedIndex: _defaultIndex >= 0 ? _defaultIndex : 0];
@@ -129,7 +141,7 @@ static NSArray *DeepCopyArray(NSArray *src) {
     // { 'sl3' : 'uthernet' }
 
     // special case for smartport since the name isn't used.
-    if ([_name isEqualToString: @"-smartport"]) {
+    if (_type == kSlotFDC) {
         SlotOption *option = [_options objectAtIndex: _selectedIndex];
         [option reserialize: dict];
         return;
@@ -264,7 +276,11 @@ static NSArray *DeepCopyArray(NSArray *src) {
     
     _name = [data objectForKey: @"name"];
     _title = [data objectForKey: @"description"];
-        
+    
+    NSNumber *x = [TypeMap objectForKey: _name];
+    if (x) _type = [x intValue];
+    
+    
     if (index < 0x10000) {
         topLevel = YES;
         _name = [@"-" stringByAppendingString: _name];
@@ -340,7 +356,7 @@ static NSArray *DeepCopyArray(NSArray *src) {
     // [menu setItemArray: ] doesn't work prior to 10.14, apparently.
     [menu removeAllItems];
 
-    if ([_name isEqualToString: @"-smartport"]) {
+    if (_type == kSlotFDC) {
         //[menu setItemArray: @[]];
         [button setHidden: YES];
     } else {
diff --git a/Ample/SlotViewController.m b/Ample/SlotViewController.m
index 9027ea5..9493c13 100644
--- a/Ample/SlotViewController.m
+++ b/Ample/SlotViewController.m
@@ -112,7 +112,7 @@ static unsigned RootKey = 0;
         NSInteger index = [item index] - 1;
         if (index < 0 || index >= MAX_SLOTS) continue;
 
-        if ([name isEqualToString: @"-bios"]) continue;
+        if ([item type] == kSlotBIOS) continue;
         
         NSString *v = [_slotValues objectForKey: name];
         if (v) {
@@ -191,7 +191,7 @@ static unsigned RootKey = 0;
     SlotOption *o = [[sender selectedItem] representedObject];
     Slot *item = [_root objectAtIndex: index];
 
-    if (direct) {
+    if (direct && [item type] != kSlotBIOS) {
         NSString *name = [item name];
         NSString *value = [o value];
         [_slotValues setObject: value forKey: name];