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diff --git a/src/devices/bus/ekara/slot.h b/src/devices/bus/ekara/slot.h
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+// license:BSD-3-Clause
+// copyright-holders:David Haywood
+#ifndef MAME_BUS_EKARA_SLOT_H
+#define MAME_BUS_EKARA_SLOT_H
+
+#pragma once
+
+#include "softlist_dev.h"
+
+/***************************************************************************
+ TYPE DEFINITIONS
+ ***************************************************************************/
+
+/* PCB */
+enum
+{
+ EKARA_PLAIN = 0,
+ EKARA_I2C_BASE,
+ EKARA_I2C_24LC04,
+ EKARA_I2C_24LC02,
+};
+
+// ======================> device_ekara_cart_interface
+
+class device_ekara_cart_interface : public device_slot_card_interface
+{
+public:
+ // construction/destruction
+ virtual ~device_ekara_cart_interface();
+
+ // reading and writing
+ virtual DECLARE_READ8_MEMBER(read_cart) { return 0xff; }
+ virtual DECLARE_WRITE8_MEMBER(write_cart) { }
+
+ virtual DECLARE_READ8_MEMBER(read_extra) { return 0xff; }
+ virtual DECLARE_WRITE8_MEMBER(write_extra) { }
+
+ void rom_alloc(uint32_t size, const char *tag);
+ uint8_t* get_rom_base() { return m_rom; }
+ uint32_t get_rom_size() { return m_rom_size; }
+
+protected:
+ device_ekara_cart_interface(const machine_config &mconfig, device_t &device);
+
+ // internal state
+ uint8_t *m_rom;
+ uint32_t m_rom_size;
+};
+
+// ======================> ekara_cart_slot_device
+
+class ekara_cart_slot_device : public device_t,
+ public device_image_interface,
+ public device_slot_interface
+{
+public:
+ // construction/destruction
+ ekara_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ template <typename T>
+ ekara_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, T &&opts, const char *dflt)
+ : ekara_cart_slot_device(mconfig, tag, owner, clock)
+ {
+ option_reset();
+ opts(*this);
+ set_default_option(dflt);
+ set_fixed(false);
+ }
+
+ virtual ~ekara_cart_slot_device();
+
+ // image-level overrides
+ virtual image_init_result call_load() override;
+ virtual void call_unload() override {}
+ virtual const software_list_loader &get_software_list_loader() const override { return rom_software_list_loader::instance(); }
+
+ int get_type() { return m_type; }
+ static int get_cart_type(const uint8_t *ROM, uint32_t len);
+
+ virtual iodevice_t image_type() const override { return IO_CARTSLOT; }
+ virtual bool is_readable() const override { return 1; }
+ virtual bool is_writeable() const override { return 0; }
+ virtual bool is_creatable() const override { return 0; }
+ virtual bool must_be_loaded() const override { return 0; }
+ virtual bool is_reset_on_load() const override { return 1; }
+ virtual const char *image_interface() const override { return "ekara_cart"; }
+ virtual const char *file_extensions() const override { return "bin,u1"; }
+
+ // slot interface overrides
+ virtual std::string get_default_card_software(get_default_card_software_hook &hook) const override;
+
+ // reading and writing
+ virtual DECLARE_READ8_MEMBER(read_cart);
+ virtual DECLARE_WRITE8_MEMBER(write_cart);
+
+ virtual DECLARE_READ8_MEMBER(read_extra);
+ virtual DECLARE_WRITE8_MEMBER(write_extra);
+
+ bool has_cart() { return m_cart ? true : false; }
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+
+ int m_type;
+ device_ekara_cart_interface* m_cart;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(EKARA_CART_SLOT, ekara_cart_slot_device)
+
+/***************************************************************************
+ DEVICE CONFIGURATION MACROS
+ ***************************************************************************/
+
+#define EKARASLOT_ROM_REGION_TAG ":cart:rom"
+
+void ekara_cart(device_slot_interface &device);
+
+#endif // MAME_BUS_EKARA_SLOT_H