// 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 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