// Copyright (c) 2008 - 2026 kio@little-bat.de
// BSD-2-Clause license
// https://opensource.org/licenses/BSD-2-Clause

#pragma once
#include "TVDecoder.h"
#include "Ula.h"

namespace zxsp
{

class UlaZx80 : public Ula
{
	friend class Chroma81;

public:
	UlaZx80(Machine*, bool is60hz);

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

	int32 doFrameFlyback(int32 cc) override;
	void  drawVideoBeamIndicator(int32 cc) override;

	void  setBorderColor(uint8) override { border_color = 0xFF; } // White: ZX80 has no "border color"
	int32 cpuCycleOfInterrupt() override { return 1 << 30; }	  // ZX80 has no regular timer interrupt
	int32 cpuCycleOfIrptEnd() override { return 1 << 30; }

	int32 cpuCycleOfFrameFlyback() override;
	int32 updateScreenUpToCycle(int32 cc) override;
	void  crtcRead(int32 cc, uint pc, uint byte) override;
	uint8 interruptAtCycle(int32, uint16) override;

	void  set60Hz(bool = 1) override;
	int32 getCcPerFrame() const volatile override { return tv_decoder.getCcPerFrame(); }
	void  setupTiming() override {}

	void enableMicOut(bool f);

protected:
	UlaZx80(Machine* m, isa_id id, cstr oaddr, cstr iaddr);
	~UlaZx80() override;

	void mic_out(Time, int32 cc, bool bit);
	bool mic_in(Time, int32 cc);

	TVDecoder tv_decoder;

	uint8 lcntr; // 3 bit low line counter [0..7] of ula
	bool  vsync;
};

} // namespace zxsp