// Copyright (c) 2002 - 2025 kio@little-bat.de
// BSD-2-Clause license
// https://opensource.org/licenses/BSD-2-Clause

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


#define z80v1len  30
#define z80v2len  55
#define z80v3len  86
#define z80maxlen sizeof(Z80Header)


enum Model {
	zxsp_i1,
	zxsp_i2,
	zxsp_i3,
	zxplus,
	zxplus_span,
	inves,
	zx128,
	zx128_span,
	zxplus2,
	zxplus2_span,
	zxplus2_frz,
	zxplus3,
	zxplus3_span,
	zxplus2a,
	zxplus2a_span,
	tc2048,
	tc2068,
	ts2068,
	u2086,
	tk90x,
	tk95,
	pentagon128,
	scorpion,
	samcoupe,
	zx80,
	zx81,
	ts1000,
	ts1500,
	tk85,
	jupiter,
	num_models,
	unknown_model = -1
};


struct Z80Header
{
	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:

	Model  getZxspModel();
	uint32 getRamsize();
	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; }
};

using Z80HeaderPtr = Z80Header*;

static_assert(z80maxlen == z80v3len + 3, "Mist: Z80Head ist mit Alignment-Bytes aufgebläht…");