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diff --git a/src/devices/bus/mtx/magrom.h b/src/devices/bus/mtx/magrom.h
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+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Martin Allcorn's Games ROM
+
+**********************************************************************/
+
+
+#ifndef MAME_BUS_MTX_MAGROM_H
+#define MAME_BUS_MTX_MAGROM_H
+
+#include "exp.h"
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> mtx_magrom_device
+
+class mtx_magrom_device : public device_t, public device_mtx_exp_interface
+{
+public:
+ // construction/destruction
+ mtx_magrom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ // optional information overrides
+ virtual ioport_constructor device_input_ports() const override;
+
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ virtual void bankswitch(uint8_t data) override;
+
+private:
+ memory_bank_creator m_bank;
+ required_ioport m_jumpers;
+
+ void page_w(uint8_t data);
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(MTX_MAGROM, mtx_magrom_device)
+
+
+#endif // MAME_BUS_MTX_MAGROM_H