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// license:BSD-3-Clause
// copyright-holders:Antoine Mine
/**********************************************************************
Copyright (C) Antoine Mine' 2007
Motorola 6843 Floppy Disk Controller emulation.
**********************************************************************/
#ifndef MAME_MACHINE_MC6843_H
#define MAME_MACHINE_MC6843_H
#pragma once
#include "imagedev/flopdrv.h"
class mc6843_device : public device_t
{
public:
mc6843_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto irq() { return m_write_irq.bind(); }
DECLARE_READ8_MEMBER(read);
DECLARE_WRITE8_MEMBER(write);
void set_drive(int drive);
void set_side(int side);
void set_index_pulse(int index_pulse);
protected:
// device-level overrides
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;
private:
enum
{
TIMER_CONT
};
devcb_write_line m_write_irq;
/* registers */
uint8_t m_CTAR; /* current track */
uint8_t m_CMR; /* command */
uint8_t m_ISR; /* interrupt status */
uint8_t m_SUR; /* set-up */
uint8_t m_STRA; /* status */
uint8_t m_STRB; /* status */
uint8_t m_SAR; /* sector address */
uint8_t m_GCR; /* general count */
uint8_t m_CCR; /* CRC control */
uint8_t m_LTAR; /* logical address track (=track destination) */
/* internal state */
uint8_t m_drive;
uint8_t m_side;
uint8_t m_data[128]; /* sector buffer */
uint32_t m_data_size; /* size of data */
uint32_t m_data_idx; /* current read/write position in data */
uint32_t m_data_id; /* chrd_id for sector write */
uint8_t m_index_pulse;
/* trigger delayed actions (bottom halves) */
emu_timer* m_timer_cont;
legacy_floppy_image_device* floppy_image(uint8_t drive);
legacy_floppy_image_device* floppy_image();
void status_update();
void cmd_end();
void finish_STZ();
void finish_SEK();
int address_search(chrn_id* id);
int address_search_read(chrn_id* id);
void finish_RCR();
void cont_SR();
void cont_SW();
};
DECLARE_DEVICE_TYPE(MC6843, mc6843_device)
#endif // MAME_MACHINE_MC6843_H
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