// Copyright (c) 1995 - 2026 kio@little-bat.de
// BSD-2-Clause license
// https://opensource.org/licenses/BSD-2-Clause

#pragma once
#include "Mmu128k.h"

/*
	Mmu for +2A and +3.
	based on Mmu128k
*/

namespace zxsp
{

class MmuPlus3 : public Mmu128k
{
	uint8 port_1ffd;

public:
	explicit MmuPlus3(Machine*);

	// set ports:
	// override mmu_is_locked
	void setDiscMotor(bool f) { setPort1ffd(f ? port_1ffd | 0x08 : port_1ffd & ~0x08); }
	void setPrinterStrobe(bool f) { setPort1ffd(f ? port_1ffd | 0x10 : port_1ffd & ~0x10); }
	void setRamOnlyMode(bool f) { setPort1ffd(f ? port_1ffd | 0x01 : port_1ffd & ~0x01); }

	bool getDiscMotorState() const volatile noexcept { return port_1ffd & 0x08; }
	bool getPrinterStrobe() const volatile noexcept { return port_1ffd & 0x10; }
	bool isRamOnlyMode() const volatile noexcept { return port_1ffd & 0x01; }

protected:
	~MmuPlus3() override = default;

	// Item interface:
	void powerOn(/*t=0*/ int32 cc) override;
	void reset(Time t, int32 cc) override;
	void output(Time t, int32 cc, uint16 addr, uint8 byte) override;

	// Mmu interface:
	void romCS(bool disable) override; // from rear-item: daisy chain
	void setPort1ffd(uint8 n) override { set_port_7ffd_and_1ffd(port_7ffd, n); }
	void setPort7ffd(uint8 n) override { set_port_7ffd_and_1ffd(n, port_1ffd); }

public:
	// bool hasPortF4() const volatile noexcept override { return no; }
	bool  hasPort7ffd() const volatile noexcept override { return yes; }
	bool  hasPort1ffd() const volatile noexcept override { return yes; }
	uint8 getPort1ffd() const volatile override { return port_1ffd; }

protected:
	// Mmu128 interface:
	void setMmuLocked(bool f) override { setPort7ffd(f ? port_7ffd | 0x20 : port_7ffd & ~0x20); }
	uint getPageC000() const volatile noexcept override;
	uint getPage8000() const volatile noexcept override;
	uint getPage4000() const volatile noexcept override;
	uint getPage0000() const volatile noexcept override;

private:
	void page_rom_plus3();
	void page_ram_plus3();
	void page_mem_plus3();
	void page_only_ram();
	void set_port_7ffd_and_1ffd(uint8, uint8);
};

} // namespace zxsp