diff --git a/Components/SAA5050/SAA5050.cpp b/Components/SAA5050/SAA5050.cpp
index 829b688d6..1f3550c9d 100644
--- a/Components/SAA5050/SAA5050.cpp
+++ b/Components/SAA5050/SAA5050.cpp
@@ -7,3 +7,157 @@
 //
 
 #include "SAA5050.hpp"
+#include <cstdint>
+
+namespace {
+// SAA5050 font, padded out to one byte per row. The least-significant five bits of each byte
+// are the meaningful pixels for that row, with the LSB being on the right.
+constexpr uint8_t font[][10] = {
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, },	// Character 32.
+	{0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x00, 0x04, 0x00, 0x00, },
+	{0x00, 0x0a, 0x0a, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, },
+	{0x00, 0x06, 0x09, 0x08, 0x1c, 0x08, 0x08, 0x1f, 0x00, 0x00, },
+	{0x00, 0x0e, 0x15, 0x14, 0x0e, 0x05, 0x15, 0x0e, 0x00, 0x00, },
+	{0x00, 0x18, 0x19, 0x02, 0x04, 0x08, 0x13, 0x03, 0x00, 0x00, },
+	{0x00, 0x08, 0x14, 0x14, 0x08, 0x15, 0x12, 0x0d, 0x00, 0x00, },
+	{0x00, 0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, },
+	{0x00, 0x02, 0x04, 0x08, 0x08, 0x08, 0x04, 0x02, 0x00, 0x00, },
+	{0x00, 0x08, 0x04, 0x02, 0x02, 0x02, 0x04, 0x08, 0x00, 0x00, },
+	{0x00, 0x04, 0x15, 0x0e, 0x04, 0x0e, 0x15, 0x04, 0x00, 0x00, },
+	{0x00, 0x00, 0x04, 0x04, 0x1f, 0x04, 0x04, 0x00, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x04, 0x08, 0x00, },
+	{0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, },
+	{0x00, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x00, 0x00, 0x00, },
+	{0x00, 0x04, 0x0a, 0x11, 0x11, 0x11, 0x0a, 0x04, 0x00, 0x00, },
+	{0x00, 0x04, 0x0c, 0x04, 0x04, 0x04, 0x04, 0x0e, 0x00, 0x00, },
+	{0x00, 0x0e, 0x11, 0x01, 0x06, 0x08, 0x10, 0x1f, 0x00, 0x00, },
+	{0x00, 0x1f, 0x01, 0x02, 0x06, 0x01, 0x11, 0x0e, 0x00, 0x00, },
+	{0x00, 0x02, 0x06, 0x0a, 0x12, 0x1f, 0x02, 0x02, 0x00, 0x00, },
+	{0x00, 0x1f, 0x10, 0x1e, 0x01, 0x01, 0x11, 0x0e, 0x00, 0x00, },
+	{0x00, 0x06, 0x08, 0x10, 0x1e, 0x11, 0x11, 0x0e, 0x00, 0x00, },
+	{0x00, 0x1f, 0x01, 0x02, 0x04, 0x08, 0x08, 0x08, 0x00, 0x00, },
+	{0x00, 0x0e, 0x11, 0x11, 0x0e, 0x11, 0x11, 0x0e, 0x00, 0x00, },
+	{0x00, 0x0e, 0x11, 0x11, 0x0f, 0x01, 0x02, 0x0c, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x04, 0x04, 0x08, 0x00, },
+	{0x00, 0x02, 0x04, 0x08, 0x10, 0x08, 0x04, 0x02, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x00, 0x00, 0x00, },
+	{0x00, 0x08, 0x04, 0x02, 0x01, 0x02, 0x04, 0x08, 0x00, 0x00, },
+	{0x00, 0x0e, 0x11, 0x02, 0x04, 0x04, 0x00, 0x04, 0x00, 0x00, },
+	{0x00, 0x0e, 0x11, 0x17, 0x15, 0x17, 0x10, 0x0e, 0x00, 0x00, },
+	{0x00, 0x04, 0x0a, 0x11, 0x11, 0x1f, 0x11, 0x11, 0x00, 0x00, },
+	{0x00, 0x1e, 0x11, 0x11, 0x1e, 0x11, 0x11, 0x1e, 0x00, 0x00, },
+	{0x00, 0x0e, 0x11, 0x10, 0x10, 0x10, 0x11, 0x0e, 0x00, 0x00, },
+	{0x00, 0x1e, 0x11, 0x11, 0x11, 0x11, 0x11, 0x1e, 0x00, 0x00, },
+	{0x00, 0x1f, 0x10, 0x10, 0x1e, 0x10, 0x10, 0x1f, 0x00, 0x00, },
+	{0x00, 0x1f, 0x10, 0x10, 0x1e, 0x10, 0x10, 0x10, 0x00, 0x00, },
+	{0x00, 0x0e, 0x11, 0x10, 0x10, 0x13, 0x11, 0x0f, 0x00, 0x00, },
+	{0x00, 0x11, 0x11, 0x11, 0x1f, 0x11, 0x11, 0x11, 0x00, 0x00, },
+	{0x00, 0x0e, 0x04, 0x04, 0x04, 0x04, 0x04, 0x0e, 0x00, 0x00, },
+	{0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x11, 0x0e, 0x00, 0x00, },
+	{0x00, 0x11, 0x12, 0x14, 0x18, 0x14, 0x12, 0x11, 0x00, 0x00, },
+	{0x00, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x1f, 0x00, 0x00, },
+	{0x00, 0x11, 0x1b, 0x15, 0x15, 0x11, 0x11, 0x11, 0x00, 0x00, },
+	{0x00, 0x11, 0x11, 0x19, 0x15, 0x13, 0x11, 0x11, 0x00, 0x00, },
+	{0x00, 0x0e, 0x11, 0x11, 0x11, 0x11, 0x11, 0x0e, 0x00, 0x00, },
+	{0x00, 0x1e, 0x11, 0x11, 0x1e, 0x10, 0x10, 0x10, 0x00, 0x00, },
+	{0x00, 0x0e, 0x11, 0x11, 0x11, 0x15, 0x12, 0x0d, 0x00, 0x00, },
+	{0x00, 0x1e, 0x11, 0x11, 0x1e, 0x14, 0x12, 0x11, 0x00, 0x00, },
+	{0x00, 0x0e, 0x11, 0x10, 0x0e, 0x01, 0x11, 0x0e, 0x00, 0x00, },
+	{0x00, 0x1f, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x00, 0x00, },
+	{0x00, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x0e, 0x00, 0x00, },
+	{0x00, 0x11, 0x11, 0x11, 0x0a, 0x0a, 0x04, 0x04, 0x00, 0x00, },
+	{0x00, 0x11, 0x11, 0x11, 0x15, 0x15, 0x15, 0x0a, 0x00, 0x00, },
+	{0x00, 0x11, 0x11, 0x0a, 0x04, 0x0a, 0x11, 0x11, 0x00, 0x00, },
+	{0x00, 0x11, 0x11, 0x0a, 0x04, 0x04, 0x04, 0x04, 0x00, 0x00, },
+	{0x00, 0x1f, 0x01, 0x02, 0x04, 0x08, 0x10, 0x1f, 0x00, 0x00, },
+	{0x00, 0x00, 0x04, 0x08, 0x1f, 0x08, 0x04, 0x00, 0x00, 0x00, },
+	{0x00, 0x10, 0x10, 0x10, 0x10, 0x16, 0x01, 0x02, 0x04, 0x07, },
+	{0x00, 0x00, 0x04, 0x02, 0x1f, 0x02, 0x04, 0x00, 0x00, 0x00, },
+	{0x00, 0x00, 0x04, 0x0e, 0x15, 0x04, 0x04, 0x00, 0x00, 0x00, },
+	{0x00, 0x0a, 0x0a, 0x1f, 0x0a, 0x1f, 0x0a, 0x0a, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x00, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x0e, 0x01, 0x0f, 0x11, 0x0f, 0x00, 0x00, },
+	{0x00, 0x10, 0x10, 0x1e, 0x11, 0x11, 0x11, 0x1e, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x0f, 0x10, 0x10, 0x10, 0x0f, 0x00, 0x00, },
+	{0x00, 0x01, 0x01, 0x0f, 0x11, 0x11, 0x11, 0x0f, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x0e, 0x11, 0x1f, 0x10, 0x0e, 0x00, 0x00, },
+	{0x00, 0x02, 0x04, 0x04, 0x0e, 0x04, 0x04, 0x04, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x0f, 0x11, 0x11, 0x11, 0x0f, 0x01, 0x0e, },
+	{0x00, 0x10, 0x10, 0x1e, 0x11, 0x11, 0x11, 0x11, 0x00, 0x00, },
+	{0x00, 0x04, 0x00, 0x0c, 0x04, 0x04, 0x04, 0x0e, 0x00, 0x00, },
+	{0x00, 0x04, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x08, },
+	{0x00, 0x08, 0x08, 0x09, 0x0a, 0x0c, 0x0a, 0x09, 0x00, 0x00, },
+	{0x00, 0x0c, 0x04, 0x04, 0x04, 0x04, 0x04, 0x0e, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x1a, 0x15, 0x15, 0x15, 0x15, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x1e, 0x11, 0x11, 0x11, 0x11, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x0e, 0x11, 0x11, 0x11, 0x0e, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x1e, 0x11, 0x11, 0x11, 0x1e, 0x10, 0x10, },
+	{0x00, 0x00, 0x00, 0x0f, 0x11, 0x11, 0x11, 0x0f, 0x01, 0x01, },
+	{0x00, 0x00, 0x00, 0x0b, 0x0c, 0x08, 0x08, 0x08, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x0f, 0x10, 0x0e, 0x01, 0x1e, 0x00, 0x00, },
+	{0x00, 0x04, 0x04, 0x0e, 0x04, 0x04, 0x04, 0x02, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x11, 0x11, 0x11, 0x11, 0x0f, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x11, 0x11, 0x0a, 0x0a, 0x04, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x11, 0x11, 0x15, 0x15, 0x0a, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x11, 0x0a, 0x04, 0x0a, 0x11, 0x00, 0x00, },
+	{0x00, 0x00, 0x00, 0x11, 0x11, 0x11, 0x11, 0x0f, 0x01, 0x0e, },
+	{0x00, 0x00, 0x00, 0x1f, 0x02, 0x04, 0x08, 0x1f, 0x00, 0x00, },
+	{0x00, 0x10, 0x10, 0x10, 0x10, 0x11, 0x03, 0x05, 0x07, 0x01, },
+	{0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00, },
+	{0x00, 0x18, 0x04, 0x18, 0x04, 0x19, 0x03, 0x05, 0x07, 0x01, },
+	{0x00, 0x00, 0x04, 0x00, 0x1f, 0x00, 0x04, 0x00, 0x00, 0x00, },
+	{0x00, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x00, 0x00, },
+};
+}
+
+using namespace Mullard;
+
+void SAA5050Serialiser::begin_frame() {
+	line_ = -1;
+	row_ = 0;
+}
+
+void SAA5050Serialiser::begin_line() {
+	++line_;
+	if(line_ == 20) {
+		line_ = 0;
+		++row_;
+	}
+
+	output_.alpha = 0x7;
+	output_.background = 0x0;
+	has_output_ = false;
+}
+
+bool SAA5050Serialiser::has_output() const {
+	return has_output_;
+}
+
+SAA5050Serialiser::Output SAA5050Serialiser::output() {
+	has_output_ = false;
+	return output_;
+}
+
+void SAA5050Serialiser::add(const uint8_t c) {
+	has_output_ = true;
+
+	const uint8_t masked_c = c & 0x7f;
+	if(masked_c < 32) {
+		// TODO: all control characters!
+		output_.pixels = 0;
+		return;
+	}
+
+	// TODO: proper scaling!
+	const uint8_t source = font[c - 32][line_ >> 1];
+	output_.pixels = uint16_t(
+		((source & 0x01) ? 0xb0000'0000'0011 : 0) |
+		((source & 0x02) ? 0xb0000'0000'1100 : 0) |
+		((source & 0x04) ? 0xb0000'0011'0000 : 0) |
+		((source & 0x08) ? 0xb0000'1100'0000 : 0) |
+		((source & 0x10) ? 0xb0011'0000'0000 : 0) |
+		((source & 0x20) ? 0xb1100'0000'0000 : 0)
+	);
+}
diff --git a/Components/SAA5050/SAA5050.hpp b/Components/SAA5050/SAA5050.hpp
index d791188f8..551387ab7 100644
--- a/Components/SAA5050/SAA5050.hpp
+++ b/Components/SAA5050/SAA5050.hpp
@@ -7,3 +7,35 @@
 //
 
 #pragma once
+
+#include <cstdint>
+
+namespace Mullard {
+
+struct SAA5050Serialiser {
+public:
+	void begin_frame();
+	void begin_line();
+
+	void add(uint8_t);
+
+	struct Output {
+		// The low twelve bits of this word provide 1bpp pixels.
+		uint16_t pixels;
+
+		// Colours for set and background pixels.
+		uint8_t alpha;
+		uint8_t background;
+	};
+	bool has_output() const;
+	Output output();
+
+private:
+	int row_, line_;
+	Output output_;
+	bool has_output_ = false;
+
+	// TODO: more state. Graphics mode only, probably?
+};
+
+}