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// license:BSD-3-Clause
// copyright-holders:David Haywood
// device interface to hold some common functions of the EFO / Cedar Magnet System PCBs
#ifndef MAME_MACHINE_CEDAR_MAGNET_BOARD_H
#define MAME_MACHINE_CEDAR_MAGNET_BOARD_H
#pragma once
#include "cpu/z80/z80.h"
#include "machine/z80daisy.h"
class cedar_magnet_board_interface : public device_interface
{
public:
// construction/destruction
cedar_magnet_board_interface(const machine_config &mconfig, device_t &device, const char *cputag, const char *ramtag);
z80_device &cpu() { assert(m_cpu != nullptr); return *m_cpu; }
u8 *ram() { return &m_ram[0]; }
virtual u8 read_cpu_bus(int offset);
virtual void write_cpu_bus(int offset, u8 data);
void irq_hold();
void halt_assert();
void halt_clear();
void reset_assert();
void reset_clear();
bool is_running() const;
protected:
virtual void interface_pre_reset() override;
virtual void interface_pre_start() override;
virtual TIMER_CALLBACK_MEMBER(reset_assert_callback);
required_device<z80_device> m_cpu;
optional_shared_ptr<u8> m_ram;
private:
TIMER_CALLBACK_MEMBER(halt_assert_callback);
TIMER_CALLBACK_MEMBER(halt_clear_callback);
TIMER_CALLBACK_MEMBER(reset_clear_callback);
bool m_is_running;
emu_timer *m_halt_assert_timer;
emu_timer *m_halt_clear_timer;
emu_timer *m_reset_assert_timer;
emu_timer *m_reset_clear_timer;
};
#endif // MAME_MACHINE_CEDAR_MAGNET_BOARD_H
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