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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
#ifndef __NES_DISKSYS_H
#define __NES_DISKSYS_H
#include "nxrom.h"
#include "imagedev/flopdrv.h"
// ======================> nes_disksys_device
class nes_disksys_device : public nes_nrom_device
{
public:
// construction/destruction
nes_disksys_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// device-level overrides
virtual void device_start() override;
virtual machine_config_constructor device_mconfig_additions() const override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
virtual const rom_entry *device_rom_region() const override;
virtual DECLARE_READ8_MEMBER(read_ex) override;
virtual DECLARE_READ8_MEMBER(read_m) override;
virtual DECLARE_READ8_MEMBER(read_h) override;
virtual DECLARE_WRITE8_MEMBER(write_ex) override;
virtual DECLARE_WRITE8_MEMBER(write_m) override;
virtual DECLARE_WRITE8_MEMBER(write_h) override;
virtual void disk_flip_side() override;
virtual void hblank_irq(int scanline, int vblank, int blanked) override;
virtual void pcb_reset() override;
static void load_proc(device_image_interface &image);
static void unload_proc(device_image_interface &image);
private:
UINT8 *m_2c33_rom;
UINT8 *m_fds_data; // here, we store a copy of the disk
required_device<legacy_floppy_image_device> m_disk;
static const device_timer_id TIMER_IRQ = 0;
emu_timer *irq_timer;
void load_disk(device_image_interface &image);
void unload_disk(device_image_interface &image);
UINT16 m_irq_count, m_irq_count_latch;
int m_irq_enable, m_irq_transfer;
UINT8 m_fds_motor_on;
UINT8 m_fds_door_closed;
UINT8 m_fds_current_side;
UINT32 m_fds_head_position;
UINT8 m_fds_status0;
UINT8 m_read_mode;
UINT8 m_drive_ready;
UINT8 m_fds_sides;
int m_fds_last_side;
int m_fds_count;
};
// device type definition
extern const device_type NES_DISKSYS;
#endif
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