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+/**********************************************************************
+
+ Commodore 2040/3040/4040/8050/8250/SFD-1001 Disk Drive emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __C2040__
+#define __C2040__
+
+
+#include "emu.h"
+#include "cpu/m6502/m6502.h"
+#include "imagedev/flopdrv.h"
+#include "formats/d64_dsk.h"
+#include "formats/g64_dsk.h"
+#include "machine/6522via.h"
+#include "machine/6532riot.h"
+#include "machine/mos6530.h"
+#include "machine/ieee488.h"
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> base_c2040_device
+
+class base_c2040_device : public device_t,
+ public device_ieee488_interface
+{
+public:
+ enum
+ {
+ TYPE_2040,
+ TYPE_3040,
+ TYPE_4040,
+ TYPE_8050,
+ TYPE_8250,
+ TYPE_8250LP,
+ TYPE_SFD1001
+ };
+
+ // construction/destruction
+ base_c2040_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, UINT32 variant);
+
+ // not really public
+ static void on_disk0_change(device_image_interface &image);
+ static void on_disk1_change(device_image_interface &image);
+
+ DECLARE_READ8_MEMBER( dio_r );
+ DECLARE_WRITE8_MEMBER( dio_w );
+ DECLARE_READ8_MEMBER( riot1_pa_r );
+ DECLARE_WRITE8_MEMBER( riot1_pa_w );
+ DECLARE_READ8_MEMBER( riot1_pb_r );
+ DECLARE_WRITE8_MEMBER( riot1_pb_w );
+ DECLARE_READ8_MEMBER( via_pa_r );
+ DECLARE_WRITE8_MEMBER( via_pb_w );
+ DECLARE_READ_LINE_MEMBER( ready_r );
+ DECLARE_READ_LINE_MEMBER( err_r );
+ DECLARE_WRITE_LINE_MEMBER( mode_sel_w );
+ DECLARE_WRITE_LINE_MEMBER( rw_sel_w );
+ DECLARE_READ8_MEMBER( pi_r );
+ DECLARE_WRITE8_MEMBER( pi_w );
+ DECLARE_READ8_MEMBER( miot_pb_r );
+ DECLARE_WRITE8_MEMBER( miot_pb_w );
+ DECLARE_READ8_MEMBER( c8050_via_pb_r );
+ DECLARE_WRITE8_MEMBER( c8050_via_pb_w );
+ DECLARE_READ8_MEMBER( c8050_miot_pb_r );
+ DECLARE_WRITE8_MEMBER( c8050_miot_pb_w );
+
+ // optional information overrides
+ virtual const rom_entry *device_rom_region() const;
+ virtual machine_config_constructor device_mconfig_additions() const;
+
+protected:
+ // device-level overrides
+ virtual void device_config_complete();
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+
+ // device_ieee488_interface overrides
+ virtual void ieee488_atn(int state);
+ virtual void ieee488_ifc(int state);
+
+ inline void update_ieee_signals();
+ inline void update_gcr_data();
+ inline void read_current_track(int unit);
+ inline void spindle_motor(int unit, int mtr);
+ inline void micropolis_step_motor(int unit, int stp);
+ inline void mpi_step_motor(int unit, int stp);
+ inline void initialize(int drives);
+
+ required_device<cpu_device> m_maincpu;
+ required_device<cpu_device> m_fdccpu;
+ required_device<riot6532_device> m_riot0;
+ required_device<riot6532_device> m_riot1;
+ required_device<device_t> m_miot;
+ required_device<via6522_device> m_via;
+ required_device<legacy_floppy_image_device> m_image0;
+ optional_device<legacy_floppy_image_device> m_image1;
+
+ struct {
+ // motors
+ int m_stp; // stepper motor phase
+ int m_mtr; // spindle motor on
+
+ // track
+ UINT8 m_track_buffer[G64_BUFFER_SIZE]; // track data buffer
+ int m_track_len; // track length
+ int m_buffer_pos; // byte position within track buffer
+ int m_bit_pos; // bit position within track buffer byte
+
+ // devices
+ device_t *m_image;
+ } m_unit[2];
+
+ int m_drive; // selected drive
+ int m_side; // selected side
+
+ // IEEE-488 bus
+ int m_rfdo; // not ready for data output
+ int m_daco; // not data accepted output
+ int m_atna; // attention acknowledge
+
+ // track
+ int m_ds; // density select
+ int m_bit_count; // GCR bit counter
+ UINT16 m_sr; // GCR data shift register
+ UINT8 m_pi; // parallel data input
+ UINT8* m_gcr; // GCR encoder/decoder ROM
+ UINT16 m_i; // GCR encoder/decoded ROM address
+ UINT8 m_e; // GCR encoder/decoded ROM data
+
+ // signals
+ int m_ready; // byte ready
+ int m_mode; // mode select
+ int m_rw; // read/write select
+ int m_miot_irq; // MIOT interrupt
+
+ // timers
+ emu_timer *m_bit_timer;
+
+ int m_variant;
+};
+
+
+// ======================> c2040_device
+
+class c2040_device : public base_c2040_device
+{
+public:
+ // construction/destruction
+ c2040_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+};
+
+
+// ======================> c3040_device
+
+class c3040_device : public base_c2040_device
+{
+public:
+ // construction/destruction
+ c3040_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+};
+
+
+// ======================> c4040_device
+
+class c4040_device : public base_c2040_device
+{
+public:
+ // construction/destruction
+ c4040_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+};
+
+
+// ======================> c8050_device
+
+class c8050_device : public base_c2040_device
+{
+public:
+ // construction/destruction
+ c8050_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+};
+
+
+// ======================> c8250_device
+
+class c8250_device : public base_c2040_device
+{
+public:
+ // construction/destruction
+ c8250_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+};
+
+
+// ======================> c8250lp_device
+
+class c8250lp_device : public base_c2040_device
+{
+public:
+ // construction/destruction
+ c8250lp_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+};
+
+
+// ======================> sfd1001_device
+
+class sfd1001_device : public base_c2040_device
+{
+public:
+ // construction/destruction
+ sfd1001_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+};
+
+
+// device type definition
+extern const device_type C2040;
+extern const device_type C3040;
+extern const device_type C4040;
+extern const device_type C8050;
+extern const device_type C8250;
+extern const device_type C8250LP;
+extern const device_type SFD1001;
+
+
+
+#endif