// Copyright (c) 2002 - 2026 kio@little-bat.de
// BSD-2-Clause license
// https://opensource.org/licenses/BSD-2-Clause

#pragma once
#include "Z80/Z80.h"
#include "ZxInfo/ZxInfo.h"
#include "kio/kio.h"


namespace zxsp
{

#define z80v1len  30
#define z80v2len  55
#define z80v3len  86
#define z80maxlen sizeof(Z80Head)

extern Model modelForZ80(FD& fd);


struct Z80Head
{
	uint8 a, f, c, b, l, h, pcl, pch, spl, sph, i, r, data, e, d, c2, b2, e2, d2, l2, h2, a2, f2, yl, yh, xl, xh, iff1,
		iff2, im;

	// Z80 version 2.01:
	uint8 h2lenl, h2lenh, npcl, npch, model;
	union
	{
		uint8 port_7ffd;
		uint8 port_f4;
	};
	union
	{
		uint8 if1paged;
		uint8 port_ff;
	};
	uint8 rldiremu;
	uint8 port_fffd, soundreg[16];

	// Z80 version 3.0:
	uint8 t_l, t_m, t_h, spectator, mgt_paged, multiface_paged, ram0, ram1, joy[10], stick[10], mgt_type,
		disciple_inhibit_button_status, disciple_inhibit_flag;

	// warajewo/xzx extension:
	uint8 port_1ffd;

	// zxsp extension:
	uint8 spectra_bits;
	uint8 spectra_port_7fdf;

	// Member functions:
	void clear() { memset(this, 0, sizeof(Z80Head)); }
	void read(FD& fd);
	void write(FD& fd);

	void setRegisters(const Z80Regs&); // put regs into Z80Head
	void getRegisters(Z80Regs&) const; // get regs from Z80Head

	Model  getZxspModel();
	void   setZxspModel(Model, bool if1, bool mgt);
	uint32 getRamsize();

	void  setCpuCycle(int32 cc, int cc_per_frame);
	int32 getCpuCycle(int cc_per_frame);

	bool isVersion145() const { return (pch | pcl) != 0; }
	bool isVersion201() const { return (pch | pcl) == 0 && h2lenl <= 23; }
	bool isVersion300() const { return (pch | pcl) == 0 && h2lenl > 23; }
	bool varyingRamsize() const { return model >= 76 && model <= 83; }
};

} // namespace zxsp