diff --git a/Analyser/Static/AppleII/StaticAnalyser.cpp b/Analyser/Static/AppleII/StaticAnalyser.cpp
index c12292336..b3825d960 100644
--- a/Analyser/Static/AppleII/StaticAnalyser.cpp
+++ b/Analyser/Static/AppleII/StaticAnalyser.cpp
@@ -14,6 +14,8 @@ Analyser::Static::TargetList Analyser::Static::AppleII::GetTargets(const Media &
 	target->machine = Machine::AppleII;
 	target->media = media;
 
+	target->has_disk = !target->media.disks.empty();
+
 	TargetList targets;
 	targets.push_back(std::move(target));
 	return targets;
diff --git a/Analyser/Static/AppleII/Target.hpp b/Analyser/Static/AppleII/Target.hpp
index 7bd90107d..9d058ac75 100644
--- a/Analyser/Static/AppleII/Target.hpp
+++ b/Analyser/Static/AppleII/Target.hpp
@@ -16,7 +16,7 @@ namespace Static {
 namespace AppleII {
 
 struct Target: public ::Analyser::Static::Target {
-	bool has_disk_;	// TODO: Disk II versus IWM?
+	bool has_disk;	// TODO: Disk II versus IWM?
 };
 
 }
diff --git a/Machines/AppleII/AppleII.cpp b/Machines/AppleII/AppleII.cpp
index f66fea105..f550d2247 100644
--- a/Machines/AppleII/AppleII.cpp
+++ b/Machines/AppleII/AppleII.cpp
@@ -18,8 +18,11 @@
 
 #include "../../Outputs/Speaker/Implementation/LowpassSpeaker.hpp"
 
+#include "Card.hpp"
 #include "Video.hpp"
 
+#include "../../Analyser/Static/AppleII/Target.hpp"
+
 #include <memory>
 
 namespace {
@@ -57,6 +60,16 @@ class ConcreteMachine:
 		void update_audio() {
 			speaker_.run_for(audio_queue_, cycles_since_audio_update_.divide(Cycles(audio_divider)));
 		}
+		void update_cards() {
+			cycles_since_card_update_ += stretched_cycles_since_card_update_ / 7;
+			stretched_cycles_since_card_update_ %= 7;
+			for(int c = 0; c < 7; ++c) {
+				if(cards_[c])
+					cards_[c]->run_for(cycles_since_card_update_, stretched_cycles_since_card_update_);
+			}
+			cycles_since_card_update_ = 0;
+			stretched_cycles_since_card_update_ = 0;
+		}
 
 		uint8_t ram_[48*1024];
 		std::vector<uint8_t> rom_;
@@ -69,6 +82,11 @@ class ConcreteMachine:
 		Outputs::Speaker::LowpassSpeaker<Audio::Toggle> speaker_;
 		Cycles cycles_since_audio_update_;
 
+		ROMMachine::ROMFetcher rom_fetcher_;
+		AppleII::Card *cards_[7] = {nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr};
+		Cycles cycles_since_card_update_;
+		int stretched_cycles_since_card_update_ = 0;
+
 	public:
 		ConcreteMachine():
 		 	m6502_(*this),
@@ -110,6 +128,7 @@ class ConcreteMachine:
 
 		Cycles perform_bus_operation(CPU::MOS6502::BusOperation operation, uint16_t address, uint8_t *value) {
 			++ cycles_since_video_update_;
+			++ cycles_since_card_update_;
 			cycles_since_audio_update_ += Cycles(7);
 
 			switch(address) {
@@ -123,7 +142,6 @@ class ConcreteMachine:
 							switch(address) {
 								default:
 //									printf("Unknown access to %04x\n", address);
-									*value = 0xff;
 								break;
 								case 0xc000:
 									*value = keyboard_input_;
@@ -160,6 +178,28 @@ class ConcreteMachine:
 				break;
 			}
 
+			if(address >= 0xc100 && address < 0xc800) {
+				/*
+					Decode the area conventionally used by cards for ROMs:
+						0xCn00 — 0xCnff: card n.
+				*/
+				const int card_number = (address - 0xc100) >> 8;
+				if(cards_[card_number]) {
+					update_cards();
+					cards_[card_number]->perform_bus_operation(operation, address & 0xff, value);
+				}
+			} else if(address >= 0xc090 && address < 0xc100) {
+				/*
+					Decode the area conventionally used by cards for registers:
+						C0n0--C0nF: card n - 8.
+				*/
+				const int card_number = (address - 0xc080) >> 4;
+				if(cards_[card_number]) {
+					update_cards();
+					cards_[card_number]->perform_bus_operation(operation, address, value);
+				}
+			}
+
 			// The Apple II has a slightly weird timing pattern: every 65th CPU cycle is stretched
 			// by an extra 1/7th. That's because one cycle lasts 3.5 NTSC colour clocks, so after
 			// 65 cycles a full line of 227.5 colour clocks have passed. But the high-rate binary
@@ -169,6 +209,7 @@ class ConcreteMachine:
 			cycles_into_current_line_ = (cycles_into_current_line_ + 1) % 65;
 			if(!cycles_into_current_line_) {
 				++ cycles_since_audio_update_;
+				++ stretched_cycles_since_card_update_;
 			}
 
 			return Cycles(1);
@@ -180,7 +221,7 @@ class ConcreteMachine:
 			audio_queue_.perform();
 		}
 
-		bool set_rom_fetcher(const std::function<std::vector<std::unique_ptr<std::vector<uint8_t>>>(const std::string &machine, const std::vector<std::string> &names)> &roms_with_names) override {
+		bool set_rom_fetcher(const ROMMachine::ROMFetcher &roms_with_names) override {
 			auto roms = roms_with_names(
 				"AppleII",
 				{
@@ -194,6 +235,8 @@ class ConcreteMachine:
 
 			character_rom_ = std::move(*roms[1]);
 
+			rom_fetcher_ = roms_with_names;
+
 			return true;
 		}
 
@@ -223,6 +266,10 @@ class ConcreteMachine:
 
 		// MARK: ConfigurationTarget
 		void configure_as_target(const Analyser::Static::Target *target) override {
+			auto *const apple_target = dynamic_cast<const Analyser::Static::AppleII::Target *>(target);
+			if(apple_target->has_disk) {
+				// ... add Disk II
+			}
 		}
 
 		bool insert_media(const Analyser::Static::Media &media) override {
diff --git a/Machines/AppleII/Card.hpp b/Machines/AppleII/Card.hpp
new file mode 100644
index 000000000..7f02a270a
--- /dev/null
+++ b/Machines/AppleII/Card.hpp
@@ -0,0 +1,27 @@
+//
+//  Card.h
+//  Clock Signal
+//
+//  Created by Thomas Harte on 23/04/2018.
+//  Copyright © 2018 Thomas Harte. All rights reserved.
+//
+
+#ifndef Card_h
+#define Card_h
+
+#include "../../ClockReceiver/ClockReceiver.hpp"
+
+namespace AppleII {
+
+class Card {
+	public:
+		/*! Advances time by @c cycles, of which @c stretches were stretched. */
+		virtual void run_for(Cycles half_cycles, int stretches) {}
+
+		/*! Performs a bus operation; the card is implicitly selected. */
+		virtual void perform_bus_operation(CPU::MOS6502::BusOperation operation, uint16_t address, uint8_t *value) = 0;
+};
+
+}
+
+#endif /* Card_h */
diff --git a/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj b/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
index bafaf0bc9..0785cb63f 100644
--- a/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj	
+++ b/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj	
@@ -1332,6 +1332,7 @@
 		4BBFBB6A1EE8401E00C01E7A /* ZX8081.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = ZX8081.cpp; path = Parsers/ZX8081.cpp; sourceTree = "<group>"; };
 		4BBFBB6B1EE8401E00C01E7A /* ZX8081.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; name = ZX8081.hpp; path = Parsers/ZX8081.hpp; sourceTree = "<group>"; };
 		4BBFFEE51F7B27F1005F3FEB /* TrackSerialiser.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = TrackSerialiser.cpp; sourceTree = "<group>"; };
+		4BC39565208EDFCE0044766B /* Card.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Card.hpp; sourceTree = "<group>"; };
 		4BC3B74D1CD194CC00F86E85 /* Shader.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Shader.cpp; sourceTree = "<group>"; };
 		4BC3B74E1CD194CC00F86E85 /* Shader.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = Shader.hpp; sourceTree = "<group>"; };
 		4BC3B7501CD1956900F86E85 /* OutputShader.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = OutputShader.cpp; sourceTree = "<group>"; };
@@ -1555,6 +1556,7 @@
 				4B15AA0A2082C799005E6C8D /* Video.cpp */,
 				4B15AA092082C799005E6C8D /* AppleII.hpp */,
 				4B15AA0B2082C799005E6C8D /* Video.hpp */,
+				4BC39565208EDFCE0044766B /* Card.hpp */,
 			);
 			path = AppleII;
 			sourceTree = "<group>";
diff --git a/OSBindings/Mac/Clock Signal/Machine/StaticAnalyser/CSStaticAnalyser.mm b/OSBindings/Mac/Clock Signal/Machine/StaticAnalyser/CSStaticAnalyser.mm
index 2ed5386b0..29862a206 100644
--- a/OSBindings/Mac/Clock Signal/Machine/StaticAnalyser/CSStaticAnalyser.mm	
+++ b/OSBindings/Mac/Clock Signal/Machine/StaticAnalyser/CSStaticAnalyser.mm	
@@ -15,6 +15,7 @@
 
 #include "../../../../../Analyser/Static/Acorn/Target.hpp"
 #include "../../../../../Analyser/Static/AmstradCPC/Target.hpp"
+#include "../../../../../Analyser/Static/AppleII/Target.hpp"
 #include "../../../../../Analyser/Static/Commodore/Target.hpp"
 #include "../../../../../Analyser/Static/MSX/Target.hpp"
 #include "../../../../../Analyser/Static/Oric/Target.hpp"
@@ -156,7 +157,7 @@ static Analyser::Static::ZX8081::Target::MemoryModel ZX8081MemoryModelFromSize(K
 - (instancetype)initWithAppleII {
 	self = [super init];
 	if(self) {
-		using Target = Analyser::Static::Target;
+		using Target = Analyser::Static::AppleII::Target;
 		std::unique_ptr<Target> target(new Target);
 		target->machine = Analyser::Machine::AppleII;
 		_targets.push_back(std::move(target));