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diff --git a/pico/cd/LC89510.h b/pico/cd/LC89510.h
new file mode 100644
index 0000000..2b0d382
--- /dev/null
+++ b/pico/cd/LC89510.h
@@ -0,0 +1,135 @@
+/***********************************************************
+ *                                                         *
+ * This source was taken from the Gens project             *
+ * Written by Stéphane Dallongeville                       *
+ * Copyright (c) 2002 by Stéphane Dallongeville            *
+ * Modified/adapted for PicoDrive by notaz, 2007           *
+ *                                                         *
+ ***********************************************************/
+
+#ifndef _LC89510_H
+#define _LC89510_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct
+{
+	unsigned char Buffer[(32 * 1024 * 2) + 2352];
+//	unsigned int Host_Data;		// unused
+//	unsigned int DMA_Adr;		// 0A
+//	unsigned int Stop_Watch;	// 0C
+	unsigned int COMIN;
+	unsigned int IFSTAT;
+	union
+	{
+		struct
+		{
+			unsigned char L;
+			unsigned char H;
+			unsigned short unused;
+		} B;
+		int N;
+	} DBC;
+	union
+	{
+		struct
+		{
+			unsigned char L;
+			unsigned char H;
+			unsigned short unused;
+		} B;
+		int N;
+	} DAC;
+	union
+	{
+		struct
+		{
+			unsigned char B0;
+			unsigned char B1;
+			unsigned char B2;
+			unsigned char B3;
+		} B;
+		unsigned int N;
+	} HEAD;
+	union
+	{
+		struct
+		{
+			unsigned char L;
+			unsigned char H;
+			unsigned short unused;
+		} B;
+		int N;
+	} PT;
+	union
+	{
+		struct
+		{
+			unsigned char L;
+			unsigned char H;
+			unsigned short unused;
+		} B;
+		int N;
+	} WA;
+	union
+	{
+		struct
+		{
+			unsigned char B0;
+			unsigned char B1;
+			unsigned char B2;
+			unsigned char B3;
+		} B;
+		unsigned int N;
+	} STAT;
+	unsigned int SBOUT;
+	unsigned int IFCTRL;
+	union
+	{
+		struct
+		{
+			unsigned char B0;
+			unsigned char B1;
+			unsigned char B2;
+			unsigned char B3;
+		} B;
+		unsigned int N;
+	} CTRL;
+	unsigned int Decode_Reg_Read;
+} CDC;
+
+typedef struct
+{
+//	unsigned short Fader;	// 34
+//	unsigned short Control;	// 36
+//	unsigned short Cur_Comm;// unused
+
+	// "Receive status"
+	unsigned short Status;
+	unsigned short Minute;
+	unsigned short Seconde;
+	unsigned short Frame;
+	unsigned char  Ext;
+	unsigned char  pad[3];
+} CDD;
+
+
+PICO_INTERNAL_ASM unsigned short Read_CDC_Host(int is_sub);
+PICO_INTERNAL void LC89510_Reset(void);
+PICO_INTERNAL void Update_CDC_TRansfer(int which);
+PICO_INTERNAL void CDC_Update_Header(void);
+
+PICO_INTERNAL unsigned char CDC_Read_Reg(void);
+PICO_INTERNAL void CDC_Write_Reg(unsigned char Data);
+
+PICO_INTERNAL void CDD_Export_Status(void);
+PICO_INTERNAL void CDD_Import_Command(void);
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif
+