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diff --git a/src/mame/fujitsu/fmt_icmem.h b/src/mame/fujitsu/fmt_icmem.h
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+// license:BSD-3-Clause
+// copyright-holders:Barry Rodewald
+/*********************************************************************
+
+ fmt_icmem.h
+
+ FM Towns IC Memory Card
+
+*********************************************************************/
+
+#ifndef MAME_FUJITSU_FMT_ICMEM_H
+#define MAME_FUJITSU_FMT_ICMEM_H
+
+#pragma once
+
+#include "imagedev/memcard.h"
+
+
+/***************************************************************************
+ FUNCTION PROTOTYPES
+***************************************************************************/
+
+class fmt_icmem_device : public device_t, public device_memcard_image_interface
+{
+public:
+ // construction/destruction
+ fmt_icmem_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ virtual bool is_reset_on_load() const noexcept override { return false; }
+ virtual const char *file_extensions() const noexcept override { return "icm"; }
+
+ virtual std::pair<std::error_condition, std::string> call_load() override;
+ virtual void call_unload() override;
+ virtual std::pair<std::error_condition, std::string> call_create(int format_type, util::option_resolution *format_options) override;
+
+ uint8_t static_mem_read(offs_t offset);
+ void static_mem_write(offs_t offset, uint8_t data);
+ uint8_t mem_read(offs_t offset);
+ void mem_write(offs_t offset, uint8_t data);
+ uint8_t status_r();
+ uint8_t bank_r(offs_t offset);
+ void bank_w(offs_t offset, uint8_t data);
+
+protected:
+ // device_t implementation
+ virtual ioport_constructor device_input_ports() const override ATTR_COLD;
+ virtual void device_start() override ATTR_COLD;
+
+private:
+ required_ioport m_writeprotect;
+ std::unique_ptr<uint8_t[]> m_memcard_ram;
+ bool m_change;
+ bool m_attr_select;
+ uint8_t m_detect;
+ uint8_t m_bank;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(FMT_ICMEM, fmt_icmem_device)
+
+
+#endif // MAME_FUJITSU_FMT_ICMEM_H