diff --git a/Machines/Acorn/Archimedes/InputOutputController.hpp b/Machines/Acorn/Archimedes/InputOutputController.hpp
index a60713c87..5be53b863 100644
--- a/Machines/Acorn/Archimedes/InputOutputController.hpp
+++ b/Machines/Acorn/Archimedes/InputOutputController.hpp
@@ -314,11 +314,11 @@ struct InputOutputController {
 		return true;
 	}
 
-	InputOutputController(InterruptObserverT &observer) :
+	InputOutputController(InterruptObserverT &observer, const uint8_t *ram) :
 		observer_(observer),
 		keyboard_(serial_),
-		sound_(*this),
-		video_(*this, sound_)
+		sound_(*this, ram),
+		video_(*this, sound_, ram)
 	{
 		irq_a_.status = IRQA::SetAlways | IRQA::PowerOnReset;
 		irq_b_.status = 0x00;
diff --git a/Machines/Acorn/Archimedes/MemoryController.hpp b/Machines/Acorn/Archimedes/MemoryController.hpp
index d087e8d83..926878e97 100644
--- a/Machines/Acorn/Archimedes/MemoryController.hpp
+++ b/Machines/Acorn/Archimedes/MemoryController.hpp
@@ -32,7 +32,7 @@ static_assert(BitMask<15, 14>::value == 49152);
 template <typename InterruptObserverT>
 struct MemoryController {
 	MemoryController(InterruptObserverT &observer) :
-		ioc_(observer) {}
+		ioc_(observer, ram_.data()) {}
 
 	int interrupt_mask() const {
 		return ioc_.interrupt_mask();
diff --git a/Machines/Acorn/Archimedes/Sound.hpp b/Machines/Acorn/Archimedes/Sound.hpp
index 9d1e5f20e..501e0ff7e 100644
--- a/Machines/Acorn/Archimedes/Sound.hpp
+++ b/Machines/Acorn/Archimedes/Sound.hpp
@@ -15,7 +15,7 @@ namespace Archimedes {
 /// Models the Archimedes sound output; in a real machine this is a joint efort between the VIDC and the MEMC.
 template <typename InterruptObserverT>
 struct Sound {
-	Sound(InterruptObserverT &observer) : observer_(observer) {}
+	Sound(InterruptObserverT &observer, const uint8_t *ram) : ram_(ram), observer_(observer) {}
 
 	void set_next_end(uint32_t value) {
 		next_.end = value;
@@ -83,6 +83,8 @@ struct Sound {
 	}
 
 private:
+	const uint8_t *ram_ = nullptr;
+
 	uint8_t divider_ = 0, reload_ = 0;
 	int byte_ = 0;
 
diff --git a/Machines/Acorn/Archimedes/Video.hpp b/Machines/Acorn/Archimedes/Video.hpp
index 96b670141..42acc49ed 100644
--- a/Machines/Acorn/Archimedes/Video.hpp
+++ b/Machines/Acorn/Archimedes/Video.hpp
@@ -16,8 +16,8 @@ namespace Archimedes {
 
 template <typename InterruptObserverT, typename SoundT>
 struct Video {
-	Video(InterruptObserverT &observer, SoundT &sound) :
-		observer_(observer), sound_(sound) {}
+	Video(InterruptObserverT &observer, SoundT &sound, const uint8_t *ram) :
+		observer_(observer), sound_(sound), ram_(ram) {}
 
 	void write(uint32_t value) {
 		const auto target = (value >> 24) & 0xfc;
@@ -166,6 +166,10 @@ private:
 	InterruptObserverT &observer_;
 	SoundT &sound_;
 
+	// In the current version of this code, video DMA occurrs costlessly,
+	// being deferred to the component itself.
+	const uint8_t *ram_ = nullptr;
+
 	// TODO: real video output.
 	uint32_t position_ = 0;