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// license:BSD-3-Clause
// copyright-holders:Sergey Svishchev
/*********************************************************************
agat_fdc.h
Implementation of the Agat 840K floppy controller card
*********************************************************************/
#ifndef MAME_BUS_A2BUS_AGAT_FDC_H
#define MAME_BUS_A2BUS_AGAT_FDC_H
#pragma once
#include "a2bus.h"
#include "imagedev/floppy.h"
#include "machine/i8255.h"
#define MXCSR_SYNC 0x40
#define MXCSR_TR 0x80
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class a2bus_agat_fdc_device:
public device_t,
public device_a2bus_card_interface
{
public:
// construction/destruction
a2bus_agat_fdc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
uint8_t d14_i_b();
uint8_t d15_i_a();
uint8_t d15_i_c();
void d14_o_c(uint8_t data);
void d15_o_b(uint8_t data);
void d15_o_c(uint8_t data);
static void floppy_formats(format_registration &fr);
protected:
// construction/destruction
a2bus_agat_fdc_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
virtual void device_add_mconfig(machine_config &config) override;
virtual const tiny_rom_entry *device_rom_region() const override;
// overrides of standard a2bus slot functions
virtual uint8_t read_c0nx(uint8_t offset) override;
virtual void write_c0nx(uint8_t offset, uint8_t data) override;
virtual uint8_t read_cnxx(uint8_t offset) override;
enum
{
TIMER_ID_LSS = 0,
TIMER_ID_SEEK,
TIMER_ID_MOTOR
};
required_device<i8255_device> m_d14;
required_device<i8255_device> m_d15;
private:
required_device<floppy_connector> floppy0;
required_device<floppy_connector> floppy1;
uint64_t time_to_cycles(const attotime &tm);
attotime cycles_to_time(uint64_t cycles);
void lss_start();
void lss_sync();
floppy_image_device *floppy;
int active, bits;
uint8_t data_reg;
uint16_t address;
uint64_t cycles;
u8 m_mxcs;
int m_unit;
int m_state;
int m_seektime;
int m_waittime;
emu_timer *m_timer_lss;
emu_timer *m_timer_seek;
emu_timer *m_timer_motor;
uint8_t *m_rom;
uint8_t *m_rom_d6;
};
// device type definition
DECLARE_DEVICE_TYPE(A2BUS_AGAT_FDC, a2bus_agat_fdc_device)
#endif // MAME_BUS_A2BUS_AGAT_FDC_H
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