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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
CD40105/HC40105 4-bit x 16-word FIFO Register
***********************************************************************
____ ____
/OE 1 |* \_/ | 16 Vcc
DIR 2 | | 15 /SO
SI 3 | | 14 DOR
D0 4 | | 13 Q0
D1 5 | 40105 | 12 Q1
D2 6 | | 11 Q2
D3 7 | | 10 Q3
GND 8 |___________| 9 MR
**********************************************************************/
#ifndef MAME_MACHINE_40105_H
#define MAME_MACHINE_40105_H
#pragma once
#include <queue>
///*************************************************************************
// TYPE DEFINITIONS
///*************************************************************************
// ======================> cmos_40105_device
class cmos_40105_device : public device_t
{
public:
// construction/destruction
cmos_40105_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
auto in_ready_cb() { return m_write_dir.bind(); }
auto out_ready_cb() { return m_write_dor.bind(); }
auto out_cb() { return m_write_q.bind(); }
u8 read();
void write(u8 data);
void si_w(int state);
void so_w(int state);
int dir_r();
int dor_r();
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
// private helpers
void load_input();
void output_ready();
// callbacks
devcb_write_line m_write_dir;
devcb_write_line m_write_dor;
devcb_write8 m_write_q;
std::queue<u8> m_fifo;
u8 m_d;
u8 m_q;
bool m_dir;
bool m_dor;
bool m_si;
bool m_so;
};
// device type definition
DECLARE_DEVICE_TYPE(CD40105, cmos_40105_device)
#endif // MAME_MACHINE_40105_H
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