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// license:BSD-3-Clause
// copyright-holders: F. Ulivi
/*********************************************************************
hp2640_tape.h
Tape subsystem of HP264x terminals
*********************************************************************/
#ifndef MAME_MACHINE_HP2640_TAPE_H
#define MAME_MACHINE_HP2640_TAPE_H
#pragma once
#include "machine/hp_dc100_tape.h"
class hp2640_tape_device : public device_t
{
public:
// construction/destruction
hp2640_tape_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// callbacks
auto irq() { return m_irq_handler.bind(); }
auto led_0() { return m_led0_handler.bind(); }
auto led_1() { return m_led1_handler.bind(); }
// I/O
void command_w(uint8_t cmd);
uint8_t status_r ();
void data_w (uint8_t data);
uint8_t data_r ();
uint8_t poll_r () const;
protected:
// device-level overrides
virtual void device_add_mconfig(machine_config &config) override;
virtual void device_start() override;
virtual void device_reset() override;
TIMER_CALLBACK_MEMBER(gap_timer_tick);
TIMER_CALLBACK_MEMBER(cell_timer_tick);
private:
devcb_write_line m_irq_handler;
devcb_write_line m_led0_handler;
devcb_write_line m_led1_handler;
// 0 is left hand drive
// 1 is right hand drive
required_device_array<hp_dc100_tape_device , 2> m_drives;
// State
uint8_t m_selected_drive; // U35-10
uint8_t m_cmd_reg; // U35 & others
uint8_t m_data_rd; // U32 & U33
uint8_t m_data_sr; // U42 & U43
uint8_t m_modulus; // U49 & U59
uint8_t m_cell_cnt; // U210
uint8_t m_bit_cnt; // U310
bool m_tach_div2; // U19-6
bool m_tach_latch; // U21-10
bool m_hole_latch; // U21-6
bool m_byte_ready; // U19-9
bool m_irq; // U48-8
bool m_bit_sync; // U110-6
bool m_wr_bit; // U110-10
bool m_last_rd_bit;
bool m_isf; // U36-6
bool m_gap;
bool m_prev_gap;
bool m_rip;
hp_dc100_tape_device::tape_op_t m_current_op;
// Timers
emu_timer *m_gap_timer;
emu_timer *m_cell_timer;
void hole_w(unsigned drive , int state);
void tacho_tick_w(unsigned drive , int state);
void motion_w(unsigned drive , int state);
void rd_bit_w(unsigned drive , int state);
int wr_bit_r(unsigned drive);
void update_irq();
bool set_speed();
void start_rd_wr(bool recalc = false);
void load_modulus();
void restart_cell_cnt();
void stop_cell_cnt();
void set_gap();
void load_gap_timer();
};
// device type definition
DECLARE_DEVICE_TYPE(HP2640_TAPE, hp2640_tape_device)
#endif /* MAME_MACHINE_HP2640_TAPE_H */
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