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// license:BSD-3-Clause
// copyright-holders:AJR
/***************************************************************************
Kawasaki Steel (Kawatetsu) KP69 Interrupt Controller
***************************************************************************/
#ifndef MAME_CPU_Z80_KP69_H
#define MAME_CPU_Z80_KP69_H
#pragma once
#include "machine/z80daisy.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class kp69_base_device : public device_t, public device_z80daisy_interface
{
public:
// callback to CPU
auto int_callback() { return m_int_callback.bind(); }
// read handlers
u8 isrl_r();
u8 isrh_r();
u8 imrl_r();
u8 imrh_r();
// interrupt inputs
template <int N> void ir_w(int state)
{
static_assert(N >= 0 && N < 16, "Invalid level");
set_input_level(N, state);
}
void add_to_state(device_state_interface &state, int index);
protected:
// construction/destruction
kp69_base_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock);
// device_t implementation
virtual void device_start() override;
virtual void device_reset() override;
// device_z80daisy_interface implementation
virtual int z80daisy_irq_state() override;
virtual int z80daisy_irq_ack() override;
virtual void z80daisy_irq_reti() override;
// internal helpers
bool int_active() const;
void set_int(bool active);
void set_input_level(int level, bool state);
void set_irr(u16 data);
void set_isr(u16 data);
void set_imr(u16 data);
void set_ler(u16 data);
void set_pgr(u16 data);
// callback object
devcb_write_line m_int_callback;
// internal state
u16 m_input_levels;
u16 m_irr;
u16 m_isr;
bool m_illegal_state;
u8 m_ivr;
u16 m_imr;
u16 m_ler;
u16 m_pgr;
bool m_int_active;
};
class kp69_device : public kp69_base_device
{
public:
// device type constructor
kp69_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
// write handlers
void lerl_pgrl_w(u8 data);
void lerh_pgrh_w(u8 data);
void imrl_w(u8 data);
void ivr_imrh_w(u8 data);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
bool m_ivr_written;
};
// device type declaration
DECLARE_DEVICE_TYPE(KP69, kp69_device)
#endif // MAME_CPU_Z80_KP69_H
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