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// license:BSD-3-Clause
// copyright-holders:Ramiro Polla
/*
 * E05A30 Gate Array (used in the Epson ActionPrinter 2000)
 *
 */

#ifndef MAME_MACHINE_E05A30_H
#define MAME_MACHINE_E05A30_H

#pragma once

class e05a30_device : public device_t
{
public:
	e05a30_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	auto printhead() { return m_write_printhead.bind(); }
	auto pf_stepper() { return m_write_pf_stepper.bind(); }
	auto cr_stepper() { return m_write_cr_stepper.bind(); }
	auto ready() { return m_write_ready.bind(); }
	auto centronics_ack() { return m_write_centronics_ack.bind(); }
	auto centronics_busy() { return m_write_centronics_busy.bind(); }
	auto centronics_perror() { return m_write_centronics_perror.bind(); }
	auto centronics_fault() { return m_write_centronics_fault.bind(); }
	auto centronics_select() { return m_write_centronics_select.bind(); }
	auto cpu_reset() { return m_write_cpu_reset.bind(); }
	auto ready_led() { return m_write_ready_led.bind(); }

	void write(offs_t offset, uint8_t data);
	uint8_t read(offs_t offset);

	/* Centronics stuff */
	void centronics_input_init(int state);
	void centronics_input_strobe(int state);
	void centronics_input_data0(int state) { if (state) m_centronics_data |= 0x01; else m_centronics_data &= ~0x01; }
	void centronics_input_data1(int state) { if (state) m_centronics_data |= 0x02; else m_centronics_data &= ~0x02; }
	void centronics_input_data2(int state) { if (state) m_centronics_data |= 0x04; else m_centronics_data &= ~0x04; }
	void centronics_input_data3(int state) { if (state) m_centronics_data |= 0x08; else m_centronics_data &= ~0x08; }
	void centronics_input_data4(int state) { if (state) m_centronics_data |= 0x10; else m_centronics_data &= ~0x10; }
	void centronics_input_data5(int state) { if (state) m_centronics_data |= 0x20; else m_centronics_data &= ~0x20; }
	void centronics_input_data6(int state) { if (state) m_centronics_data |= 0x40; else m_centronics_data &= ~0x40; }
	void centronics_input_data7(int state) { if (state) m_centronics_data |= 0x80; else m_centronics_data &= ~0x80; }

	int get_ready_led() { return !m_centronics_busy; }

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;

private:
	/* callbacks */
	devcb_write16 m_write_printhead;
	devcb_write8 m_write_pf_stepper;
	devcb_write8 m_write_cr_stepper;
	devcb_write_line m_write_ready;
	devcb_write_line m_write_centronics_ack;
	devcb_write_line m_write_centronics_busy;
	devcb_write_line m_write_centronics_perror;
	devcb_write_line m_write_centronics_fault;
	devcb_write_line m_write_centronics_select;
	devcb_write_line m_write_cpu_reset;
	devcb_write_line m_write_ready_led;

	void update_printhead(int pos, uint8_t data);
	void update_pf_stepper(uint8_t data);
	void update_cr_stepper(uint8_t data);

	/* port 0x05 and 0x06 (9-bit) */
	uint16_t m_printhead;
	/* port 0x07 (4-bit) */
	uint8_t m_pf_stepper;
	/* port 0x08 (4-bit) */
	uint8_t m_cr_stepper;

	/* Centronics stuff */
	uint8_t m_centronics_data;
	int m_centronics_busy;
	int m_centronics_nack;
	uint8_t m_centronics_init;
	uint8_t m_centronics_strobe;
	uint8_t m_centronics_data_latch;
	uint8_t m_centronics_data_latched;
	uint32_t m_c000_shift_register;

};

DECLARE_DEVICE_TYPE(E05A30, e05a30_device)

#endif // MAME_MACHINE_E05A30_H