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// license: BSD-3-Clause
// copyright-holders: Dirk Best, Luca Elia
/***************************************************************************
SN54/74165
8-Bit Parallel-In/Serial-Out Shift Register
___ ___
SH//LD 1 |* u | 16 VCC
CLK 2 | | 15 CLK INH
E 3 | | 14 D
F 4 | | 13 C
G 5 | | 12 B
H 6 | | 11 A
/QH 7 | | 10 SER
GND 8 |_______| 9 QH
***************************************************************************/
#ifndef MAME_DEVICES_MACHINE_74165_H
#define MAME_DEVICES_MACHINE_74165_H
#pragma once
#include "machine/timer.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class ttl165_device : public device_t
{
public:
// construction/destruction
ttl165_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock = XTAL());
auto data_callback() { return m_data_cb.bind(); }
auto qh_callback() { return m_qh_cb.bind(); }
DECLARE_WRITE_LINE_MEMBER(serial_w);
DECLARE_WRITE_LINE_MEMBER(clock_w);
DECLARE_WRITE_LINE_MEMBER(shift_load_w);
protected:
// device-level overrides
virtual void device_add_mconfig(machine_config &config) override;
virtual void device_start() override;
virtual void device_reset() override;
private:
required_device<timer_device> m_timer;
// callbacks
devcb_read8 m_data_cb;
devcb_write_line m_qh_cb;
// state
uint8_t m_data;
int m_ser;
int m_clk;
int m_shld;
TIMER_DEVICE_CALLBACK_MEMBER(qh_output);
void update_qh();
};
// device type definition
DECLARE_DEVICE_TYPE(TTL165, ttl165_device)
#endif // MAME_DEVICES_MACHINE_74165_H
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