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// license:BSD-3-Clause
// copyright-holders:Vas Crabb
#ifndef MAME_MACHINE_TAITSJSEC_H
#define MAME_MACHINE_TAITSJSEC_H
#pragma once
#include "cpu/m6805/m68705.h"
DECLARE_DEVICE_TYPE(TAITO_SJ_SECURITY_MCU, taito_sj_security_mcu_device)
#define MCFG_TAITO_SJ_SECURITY_MCU_INT_MODE(mode) \
downcast<taito_sj_security_mcu_device &>(*device).set_int_mode(taito_sj_security_mcu_device::int_mode::mode);
#define MCFG_TAITO_SJ_SECURITY_MCU_68READ_CB(cb) \
downcast<taito_sj_security_mcu_device &>(*device).set_68read_cb(DEVCB_##cb);
#define MCFG_TAITO_SJ_SECURITY_MCU_68WRITE_CB(cb) \
downcast<taito_sj_security_mcu_device &>(*device).set_68write_cb(DEVCB_##cb);
#define MCFG_TAITO_SJ_SECURITY_MCU_68INTRQ_CB(cb) \
downcast<taito_sj_security_mcu_device &>(*device).set_68intrq_cb(DEVCB_##cb);
#define MCFG_TAITO_SJ_SECURITY_MCU_BUSRQ_CB(cb) \
downcast<taito_sj_security_mcu_device &>(*device).set_busrq_cb(DEVCB_##cb);
class taito_sj_security_mcu_device : public device_t
{
public:
enum class int_mode
{
NONE,
LATCH,
WRITE
};
void set_int_mode(int_mode mode) { m_int_mode = mode; }
template <typename Obj> devcb_base &set_68read_cb(Obj &&cb) { return m_68read_cb.set_callback(std::forward<Obj>(cb)); }
template <typename Obj> devcb_base &set_68write_cb(Obj &&cb) { return m_68write_cb.set_callback(std::forward<Obj>(cb)); }
template <typename Obj> devcb_base &set_68intrq_cb(Obj &&cb) { return m_68intrq_cb.set_callback(std::forward<Obj>(cb)); }
template <typename Obj> devcb_base &set_busrq_cb(Obj &&cb) { return m_busrq_cb.set_callback(std::forward<Obj>(cb)); }
taito_sj_security_mcu_device(
machine_config const &mconfig,
char const *tag,
device_t *owner,
u32 clock);
// uses two consecutive addresses
DECLARE_READ8_MEMBER(data_r);
DECLARE_WRITE8_MEMBER(data_w);
DECLARE_WRITE_LINE_MEMBER(busak_w);
DECLARE_WRITE_LINE_MEMBER(reset_w);
protected:
void device_start() override;
void device_reset() override;
void device_add_mconfig(machine_config &config) override;
DECLARE_READ8_MEMBER(mcu_pa_r);
DECLARE_READ8_MEMBER(mcu_pc_r);
DECLARE_WRITE8_MEMBER(mcu_pa_w);
DECLARE_WRITE8_MEMBER(mcu_pb_w);
private:
u8 const get_bus_val() const
{ return (BIT(~m_pb_val, 1) ? m_host_data : 0xffU) & m_pa_val & ((m_busak && BIT(~m_pb_val, 5)) ? m_read_data : 0xffU); }
TIMER_CALLBACK_MEMBER(do_mcu_read);
TIMER_CALLBACK_MEMBER(do_mcu_write);
TIMER_CALLBACK_MEMBER(do_host_write);
required_device<m68705p_device> m_mcu;
int_mode m_int_mode;
devcb_read8 m_68read_cb;
devcb_write8 m_68write_cb;
devcb_write_line m_68intrq_cb;
devcb_write_line m_busrq_cb;
// IC6/IC10 latch/count the low byte, IC14 buffers low byte, IC3 latches high byte
u16 m_addr;
// latched by IC9
u8 m_mcu_data;
// latched by IC13
u8 m_host_data;
// buffered by IC16
u8 m_read_data;
// IC7 pin 6, indicates CPU has accepted data from MCU
bool m_zaccept;
// IC7 pin 9, indicates CPU has sent data to MCU
bool m_zready;
// previous MCU port outputs for detecting edges
u8 m_pa_val, m_pb_val;
// input state
bool m_busak, m_reset;
};
#endif // MAME_MACHINE_TATISJSEC_H
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