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diff --git a/src/devices/bus/coleco/xin1.h b/src/devices/bus/coleco/xin1.h
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+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+/**********************************************************************
+
+ ColecoVision X-in-1 cartridge emulation
+
+**********************************************************************/
+
+#ifndef MAME_BUS_COLECO_XIN1_H
+#define MAME_BUS_COLECO_XIN1_H
+
+#pragma once
+
+#include "exp.h"
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> colecovision_xin1_cartridge_device
+
+class colecovision_xin1_cartridge_device : public device_t,
+ public device_colecovision_cartridge_interface
+{
+public:
+ // construction/destruction
+ colecovision_xin1_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ // device_colecovision_expansion_card_interface overrides
+ virtual uint8_t bd_r(address_space &space, offs_t offset, uint8_t data, int _8000, int _a000, int _c000, int _e000) override;
+
+private:
+ uint32_t m_current_offset;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(COLECOVISION_XIN1, colecovision_xin1_cartridge_device)
+
+
+#endif // MAME_BUS_COLECO_XIN1_H