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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Western Digital WD2010 Winchester Disk Controller
**********************************************************************/
#ifndef MAME_MACHINE_WD2010_H
#define MAME_MACHINE_WD2010_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> wd2010_device
class wd2010_device : public device_t
{
public:
// construction/destruction
wd2010_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto out_intrq_callback() { return m_out_intrq_cb.bind(); }
auto out_bdrq_callback() { return m_out_bdrq_cb.bind(); }
auto out_bcr_callback() { return m_out_bcr_cb.bind(); }
auto in_brdy_callback() { return m_in_brdy_cb.bind(); }
auto in_bcs_callback() { return m_in_bcs_cb.bind(); }
auto out_bcs_callback() { return m_out_bcs_cb.bind(); }
auto out_dirin_callback() { return m_out_dirin_cb.bind(); }
auto out_step_callback() { return m_out_step_cb.bind(); }
auto out_rwc_callback() { return m_out_rwc_cb.bind(); }
auto out_wg_callback() { return m_out_wg_cb.bind(); }
auto in_drdy_callback() { return m_in_drdy_cb.bind(); }
auto in_index_callback() { return m_in_index_cb.bind(); }
auto in_wf_callback() { return m_in_wf_cb.bind(); }
auto in_tk000_callback() { return m_in_tk000_cb.bind(); }
auto in_sc_callback() { return m_in_sc_cb.bind(); }
uint8_t read(offs_t offset);
void write(offs_t offset, uint8_t data);
void buffer_ready(bool state);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
TIMER_CALLBACK_MEMBER(command_complete);
TIMER_CALLBACK_MEMBER(complete_write);
TIMER_CALLBACK_MEMBER(deassert_write);
TIMER_CALLBACK_MEMBER(deassert_read);
private:
void compute_correction(uint8_t data);
void set_parameter(uint8_t data);
void restore(uint8_t data);
void seek(uint8_t data);
void read_sector(uint8_t data);
void write_sector(uint8_t data);
void scan_id(uint8_t data);
void update_sdh(uint8_t new_sector_size, uint8_t new_head, uint16_t new_cylinder, uint8_t new_sectornr);
void auto_scan_id(uint8_t data);
void format(uint8_t data);
devcb_write_line m_out_intrq_cb;
devcb_write_line m_out_bdrq_cb;
devcb_write_line m_out_bcr_cb;
devcb_read8 m_in_bcs_cb;
devcb_read_line m_in_brdy_cb;
devcb_write8 m_out_bcs_cb;
devcb_write_line m_out_dirin_cb;
devcb_write_line m_out_step_cb;
devcb_write_line m_out_rwc_cb;
devcb_write_line m_out_wg_cb;
devcb_read_line m_in_drdy_cb;
devcb_read_line m_in_index_cb;
devcb_read_line m_in_wf_cb;
devcb_read_line m_in_tk000_cb;
devcb_read_line m_in_sc_cb;
uint8_t m_status;
uint8_t m_error;
uint8_t m_task_file[8];
emu_timer *m_cmd_timer;
emu_timer *m_complete_write_timer;
emu_timer *m_deassert_write_timer;
emu_timer *m_deassert_read_timer;
void complete_write_sector(uint8_t status);
void complete_cmd(uint8_t status);
void complete_immediate(uint8_t status);
bool is_buffer_ready;
uint32_t m_present_cylinder; // Present Cylinder Position Register
};
// device type definition
DECLARE_DEVICE_TYPE(WD2010, wd2010_device)
#endif // MAME_MACHINE_WD2010_H
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