diff --git a/include/c64/reu.c b/include/c64/reu.c
new file mode 100644
index 0000000..8f7b402
--- /dev/null
+++ b/include/c64/reu.c
@@ -0,0 +1,2 @@
+#include "reu.h"
+
diff --git a/include/c64/reu.h b/include/c64/reu.h
new file mode 100644
index 0000000..2784f46
--- /dev/null
+++ b/include/c64/reu.h
@@ -0,0 +1,50 @@
+#ifndef C64_REU_H
+#define C64_REU_H
+
+#include "types.h"
+
+#define REU_STAT_IRQ		0x80
+#define REU_STAT_EOB		0x40
+#define REU_STAT_FAULT		0x20
+#define REU_STAT_SIZE		0x10
+#define REU_STAT_VERSION	0x0f
+
+#define REU_CTRL_FIXL		0x80
+#define REU_CTRL_FIXR		0x40
+#define REU_CTRL_INCL		0x00
+#define REU_CTRL_INCR		0x00
+
+#define REU_IRQ_ENABLE		0x80
+#define REU_IRQ_EOB			0x40
+#define REU_IRQ_FAULT		0x20
+
+#define REU_CMD_EXEC		0x80
+#define REU_CMD_AUTO		0x20
+#define REU_CMD_FF00		0x10
+#define REU_CMD_STORE		0x00
+#define REU_CMD_LOAD		0x01
+#define REU_CMD_SWAP		0x02
+#define REU_CMD_VERIFY		0x03
+
+struct REU
+{
+	volatile byte	status;
+	volatile byte	cmd;
+
+	volatile word	laddr;
+	volatile word	raddr;
+	volatile byte	rbank;
+
+	volatile word	length;
+
+	volatile byte	irqmask;
+	volatile byte	ctrl;
+};
+
+
+#define reu 	(*((struct REU *)0xdf00))
+
+
+#pragma compile("reu.c")
+
+#endif