// license:BSD-3-Clause // copyright-holders:AJR /********************************************************************** Intel 82355 Bus Master Interface Controller (BMIC) **********************************************************************/ #ifndef MAME_MACHINE_I82355_H #define MAME_MACHINE_I82355_H #pragma once //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> i82355_device class i82355_device : public device_t { public: // construction/destruction i82355_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); // callback configuration auto eint_callback() { return m_eint_callback.bind(); } auto lint_callback() { return m_lint_callback.bind(); } // local CPU access u8 local_r(offs_t offset); void local_w(offs_t offset, u8 data); protected: // device-level overrides virtual void device_resolve_objects() override; virtual void device_start() override; virtual void device_reset() override; private: // helpers void set_local_interrupt(u8 flag); void clear_local_interrupt(u8 flag); void set_system_interrupt(u8 flag); void clear_system_interrupt(u8 flag); void global_config(u8 flag); void identify_board(); void peek_poke_control(u8 flag); void transfer_config(int channel, u8 flag); void transfer_strobe(int channel); u8 local_register_read(u8 reg); void local_register_write(u8 reg, u8 data); // callbacks devcb_write_line m_eint_callback; devcb_write_line m_lint_callback; // internal state u8 m_local_index; u8 m_local_status; PAIR m_id; u8 m_global_config; u8 m_system_interrupt; bool m_semaphore_flag[2]; bool m_semaphore_etest[2]; bool m_semaphore_ltest[2]; u8 m_local_doorbell_status; u8 m_local_doorbell_enable; u8 m_eisa_doorbell_status; u8 m_eisa_doorbell_enable; u8 m_mailbox[16]; PAIR m_peek_poke_data; PAIR m_peek_poke_address; u8 m_peek_poke_control; u8 m_peek_poke_status; u8 m_io_decode_base[2]; u8 m_io_decode_control[2]; u8 m_transfer_config[2]; u8 m_transfer_status[2]; PAIR m_base_count[2]; PAIR m_base_address[2]; PAIR m_current_count[2]; PAIR m_current_address[2]; PAIR16 m_tbi_base[2]; PAIR16 m_tbi_current[2]; }; // device type declaration DECLARE_DEVICE_TYPE(I82355, i82355_device) #endif // MAME_MACHINE_I82355_H