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// license:BSD-3-Clause
// copyright-holders:AJR

#ifndef MAME_CPU_RX01_RX01_H
#define MAME_CPU_RX01_RX01_H

#pragma once

class rx01_cpu_device : public cpu_device
{
public:
	enum {
		RX01_PC,
		RX01_CNTR, RX01_SR, RX01_SPAR,
		RX01_R0, RX01_R1, RX01_R2, RX01_R3, RX01_R4, RX01_R5, RX01_R6, RX01_R7,
		RX01_R8, RX01_R9, RX01_R10, RX01_R11, RX01_R12, RX01_R13, RX01_R14, RX01_R15,
		RX01_BAR,
		RX01_CRC,
		RX01_UNIT, RX01_LDHD, RX01_INDEX
	};

	enum : u16 {
		FF_IOB0 = 1 << 0,
		FF_IOB1 = 1 << 1,
		FF_IOB2 = 1 << 2,
		FF_IOB3 = 1 << 3,
		FF_IOB4 = 1 << 4,
		FF_IOB5 = 1 << 5,
		FF_IOB6 = 1 << 6,
		FF_WRTBUF = 1 << 7,
		FF_FLAG = 1 << 8
	};

	enum {
		RX_RUN = 0,
		RX_12_BIT,
		RX_DATA
	};

	// device type constructor
	rx01_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);

	// callback configuration
	auto error_callback() { return m_interface_callback[0].bind(); }
	auto transfer_request_callback() { return m_interface_callback[1].bind(); }
	auto out_callback() { return m_interface_callback[2].bind(); }
	auto done_callback() { return m_interface_callback[3].bind(); }
	auto shift_callback() { return m_interface_callback[4].bind(); }

	// serial input for controller
	int data_r() { return !data_in(); }

protected:
	// device_t implementation
	virtual void device_start() override ATTR_COLD;
	virtual void device_reset() override ATTR_COLD;

	// device_execute_interface implementation
	virtual u64 execute_clocks_to_cycles(u64 clocks) const noexcept override { return (clocks + 4 - 1) / 4; }
	virtual u64 execute_cycles_to_clocks(u64 cycles) const noexcept override { return (cycles * 4); }
	virtual void execute_set_input(int linenum, int state) override;
	virtual void execute_run() override;

	// device_disasm_interface implementation
	virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;

	// device_memory_interface implementation
	virtual space_config_vector memory_space_config() const override;

	// device_state_interface implementation
	virtual void state_string_export(const device_state_entry &entry, std::string &str) const override;

private:
	// internal helpers
	u8 mux_out();
	bool data_in();
	bool sep_data();
	bool sep_clk();
	bool missing_clk();
	bool drv_sel_trk0();
	bool sec_buf_in();
	bool test_condition();
	void set_bar(u16 bar);
	void shift_crc(bool data);
	void set_flag(bool j, bool k);

	// address spaces
	address_space_config m_inst_config;
	address_space_config m_data_config;
	memory_access<12, 0, 0, ENDIANNESS_LITTLE>::cache m_inst_cache;
	memory_access<10, 0, 0, ENDIANNESS_LITTLE>::cache m_data_cache;

	// interface output callbacks
	devcb_write_line::array<5> m_interface_callback;

	// internal state
	u16 m_pc;
	u16 m_ppc;
	u8 m_mb;
	bool m_br_condition;
	bool m_inst_disable;
	bool m_inst_repeat;
	u8 m_cntr;
	u8 m_sr;
	u8 m_spar;
	u8 m_sp[16];
	u16 m_bar;
	u16 m_crc;
	u16 m_flags;
	bool m_run;
	bool m_12_bit;
	bool m_data_in;
	bool m_unit;
	bool m_load_head;
	bool m_syn_index;
	s32 m_icount;
};

DECLARE_DEVICE_TYPE(RX01_CPU, rx01_cpu_device)

#endif // MAME_CPU_RX01_RX01_H