diff --git a/Machines/Apple/AppleII/AppleII.cpp b/Machines/Apple/AppleII/AppleII.cpp
index 857c07503..a447e88c7 100644
--- a/Machines/Apple/AppleII/AppleII.cpp
+++ b/Machines/Apple/AppleII/AppleII.cpp
@@ -102,10 +102,12 @@ template <Analyser::Static::AppleII::Target::Model model> class ConcreteMachine:
 		Cycles cycles_since_audio_update_;
 
 		// MARK: - Cards
-		std::array<std::unique_ptr<Apple::II::Card>, 7> cards_;
+		std::array<std::unique_ptr<Apple::II::Card>, 9> cards_;	// The final slot is a sentinel.
 		Cycles cycles_since_card_update_;
 		std::vector<Apple::II::Card *> every_cycle_cards_;
 		std::vector<Apple::II::Card *> just_in_time_cards_;
+		static constexpr size_t NoActiveCard = 8;
+		size_t active_card_ = NoActiveCard;
 
 		int stretched_cycles_since_card_update_ = 0;
 
@@ -739,18 +741,32 @@ template <Analyser::Static::AppleII::Target::Model model> class ConcreteMachine:
 					Communication with cards follows.
 				*/
 
-				if(!read_pages_[address >> 8] && address >= 0xc090 && address < 0xc800) {
+				if(!read_pages_[address >> 8] && address >= 0xc090 && address < 0xd000) {
 					// If this is a card access, figure out which card is at play before determining
 					// the totality of who needs messaging.
 					size_t card_number = 0;
 					Apple::II::Card::Select select = Apple::II::Card::None;
 
-					if(address >= 0xc100) {
+					if(address >= 0xc800) {
+						/*
+							Decode the 2kb area used for additional ROMs.
+							This is shared by all cards.
+						*/
+						card_number = active_card_;
+						select = Apple::II::Card::C8Region;
+
+						// An access to $cfff will disable the active card.
+						if(address == 0xcfff) {
+							active_card_ = NoActiveCard;
+						}
+					} else if(address >= 0xc100) {
 						/*
 							Decode the area conventionally used by cards for ROMs:
 								0xCn00 to 0xCnff: card n.
+
+							This also sets the active card for the C8 region.
 						*/
-						card_number = (address - 0xc100) >> 8;
+						active_card_ = card_number = (address - 0xc100) >> 8;
 						select = Apple::II::Card::Device;
 					} else {
 						/*