// license:BSD-3-Clause // copyright-holders:hap /*************************************************************************** Alpha Denshi ALPHA-8201 family protection emulation ***************************************************************************/ #ifndef MAME_MACHINE_ALPHA8201_H #define MAME_MACHINE_ALPHA8201_H #include "cpu/hmcs40/hmcs40.h" class alpha_8201_device : public device_t { public: alpha_8201_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); ~alpha_8201_device() {} // external I/O DECLARE_WRITE_LINE_MEMBER(bus_dir_w); DECLARE_WRITE_LINE_MEMBER(mcu_start_w); u8 ext_ram_r(offs_t offset); void ext_ram_w(offs_t offset, u8 data); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; virtual void device_add_mconfig(machine_config &config) override; private: // devices/pointers required_device m_mcu; // internal state int m_bus = 0; // shared RAM bus direction u16 m_mcu_address = 0; // MCU side RAM address u16 m_mcu_d = 0; // MCU D output data u8 m_mcu_r[4]{}; // MCU R0-R3 output data std::unique_ptr m_shared_ram; // 1KB RAM void mcu_update_address(); void mcu_writeram(); u8 mcu_data_r(offs_t offset); void mcu_data_w(offs_t offset, u8 data); void mcu_d_w(u16 data); }; DECLARE_DEVICE_TYPE(ALPHA_8201, alpha_8201_device) #endif // MAME_MACHINE_ALPHA8201_H