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diff --git a/src/devices/bus/a2bus/agat840k_hle.h b/src/devices/bus/a2bus/agat840k_hle.h
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+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+/*********************************************************************
+
+ agat840k_hle.h
+
+ High-level simulation of the Agat 840K floppy controller card
+
+*********************************************************************/
+
+#ifndef MAME_BUS_A2BUS_AGAT840K_HLE_H
+#define MAME_BUS_A2BUS_AGAT840K_HLE_H
+
+#pragma once
+
+#include "a2bus.h"
+#include "imagedev/flopdrv.h"
+#include "machine/i8255.h"
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class a2bus_agat840k_hle_device:
+ public device_t,
+ public device_a2bus_card_interface
+{
+public:
+ enum : u8
+ {
+ MXCSR_SYNC = 0x40,
+ MXCSR_TR = 0x80
+ };
+
+ // construction/destruction
+ a2bus_agat840k_hle_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ DECLARE_READ8_MEMBER(d14_i_b);
+ DECLARE_READ8_MEMBER(d15_i_a);
+ DECLARE_READ8_MEMBER(d15_i_c);
+ DECLARE_WRITE8_MEMBER(d14_o_c);
+ DECLARE_WRITE8_MEMBER(d15_o_b);
+ DECLARE_WRITE8_MEMBER(d15_o_c);
+
+ DECLARE_WRITE_LINE_MEMBER(index_0_w);
+ DECLARE_WRITE_LINE_MEMBER(index_1_w);
+
+ void index_callback(int unit, int state);
+
+protected:
+ // construction/destruction
+ a2bus_agat840k_hle_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+
+ virtual void device_start() override;
+ virtual void device_reset() override;
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual const tiny_rom_entry *device_rom_region() const override;
+
+ // overrides of standard a2bus slot functions
+ virtual uint8_t read_c0nx(address_space &space, uint8_t offset) override;
+ virtual void write_c0nx(address_space &space, uint8_t offset, uint8_t data) override;
+ virtual uint8_t read_cnxx(address_space &space, uint8_t offset) override;
+
+ enum
+ {
+ TIMER_ID_WAIT = 0,
+ TIMER_ID_SEEK
+ };
+
+ required_device<i8255_device> m_d14;
+ required_device<i8255_device> m_d15;
+
+private:
+ legacy_floppy_image_device *floppy_image(int drive);
+ legacy_floppy_image_device *m_floppy;
+ bool m_side;
+
+ std::unique_ptr<uint16_t[]> m_tracks[160];
+ int m_count_read;
+ int m_count_write;
+ bool m_seen_magic;
+ int m_current_track;
+
+ u8 m_mxcs;
+ int m_unit;
+ int m_state;
+
+ int m_seektime;
+ int m_waittime;
+
+ emu_timer *m_timer_wait = nullptr;
+ emu_timer *m_timer_seek = nullptr;
+
+ uint8_t *m_rom;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(A2BUS_AGAT840K_HLE, a2bus_agat840k_hle_device)
+
+#endif // MAME_BUS_A2BUS_AGAT840K_HLE_H