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Diffstat (limited to 'src/devices/bus/nes/disksys.h')
-rw-r--r-- | src/devices/bus/nes/disksys.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/devices/bus/nes/disksys.h b/src/devices/bus/nes/disksys.h new file mode 100644 index 00000000000..dcb2bd75c0c --- /dev/null +++ b/src/devices/bus/nes/disksys.h @@ -0,0 +1,71 @@ +// 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(); + virtual machine_config_constructor device_mconfig_additions() const; + virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); + virtual const rom_entry *device_rom_region() const; + + virtual DECLARE_READ8_MEMBER(read_ex); + virtual DECLARE_READ8_MEMBER(read_m); + virtual DECLARE_READ8_MEMBER(read_h); + virtual DECLARE_WRITE8_MEMBER(write_ex); + virtual DECLARE_WRITE8_MEMBER(write_m); + virtual DECLARE_WRITE8_MEMBER(write_h); + + virtual void disk_flip_side(); + + virtual void hblank_irq(int scanline, int vblank, int blanked); + virtual void pcb_reset(); + + 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 |