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-rw-r--r--src/devices/bus/nes/disksys.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/src/devices/bus/nes/disksys.h b/src/devices/bus/nes/disksys.h
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+++ b/src/devices/bus/nes/disksys.h
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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();
+ 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