AxibugEmuOnline/OtherCore/MyNes.Standard2/MyNes.Core/Mapper069.cs

using System.IO;

namespace MyNes.Core
{
    [BoardInfo("FME-7/Sunsoft 5B", 69)]
    [WithExternalSound]
    internal class Mapper069 : Board
    {
    	private int address_A000;

    	private int address_E000;

    	private int irq_counter;

    	private bool irq_count_enabled;

    	private bool irq_trigger_enabled;

    	private Sunsoft5BChnl snd_1;

    	private Sunsoft5BChnl snd_2;

    	private Sunsoft5BChnl snd_3;

    	private double[] audio_pulse_table;

    	private double[] audio_tnd_table;

    	internal override void Initialize(IRom rom)
    	{
    		base.Initialize(rom);
    		snd_1 = new Sunsoft5BChnl();
    		snd_2 = new Sunsoft5BChnl();
    		snd_3 = new Sunsoft5BChnl();
    		audio_pulse_table = new double[32];
    		for (int i = 0; i < 32; i++)
    		{
    			audio_pulse_table[i] = 95.52 / (8128.0 / (double)i + 100.0);
    		}
    		audio_tnd_table = new double[204];
    		for (int j = 0; j < 204; j++)
    		{
    			audio_tnd_table[j] = 163.67 / (24329.0 / (double)j + 100.0);
    		}
    	}

    	internal override void HardReset()
    	{
    		base.HardReset();
    		Switch08KPRG(PRG_ROM_08KB_Mask, PRGArea.AreaE000);
    		address_A000 = 0;
    		irq_counter = 65535;
    		irq_count_enabled = false;
    		irq_trigger_enabled = false;
    		APUApplyChannelsSettings();
    		snd_1.HardReset();
    		snd_2.HardReset();
    		snd_3.HardReset();
    	}

    	internal override void WritePRG(ref ushort address, ref byte data)
    	{
    		switch (address & 0xE000)
    		{
    		case 32768:
    			address_A000 = data & 0xF;
    			break;
    		case 40960:
    			switch (address_A000)
    			{
    			case 0:
    				Switch01KCHR(data, CHRArea.Area0000);
    				break;
    			case 1:
    				Switch01KCHR(data, CHRArea.Area0400);
    				break;
    			case 2:
    				Switch01KCHR(data, CHRArea.Area0800);
    				break;
    			case 3:
    				Switch01KCHR(data, CHRArea.Area0C00);
    				break;
    			case 4:
    				Switch01KCHR(data, CHRArea.Area1000);
    				break;
    			case 5:
    				Switch01KCHR(data, CHRArea.Area1400);
    				break;
    			case 6:
    				Switch01KCHR(data, CHRArea.Area1800);
    				break;
    			case 7:
    				Switch01KCHR(data, CHRArea.Area1C00);
    				break;
    			case 8:
    				TogglePRGRAMEnable((data & 0x80) == 128);
    				if ((data & 0x40u) != 0)
    				{
    					Toggle08KPRG_RAM(ram: true, PRGArea.Area6000);
    					Switch08KPRG(data & 0x3F & PRG_RAM_08KB_Mask, PRGArea.Area6000);
    				}
    				else
    				{
    					Toggle08KPRG_RAM(ram: false, PRGArea.Area6000);
    					Switch08KPRG(data & 0x3F, PRGArea.Area6000);
    				}
    				break;
    			case 9:
    				Switch08KPRG(data, PRGArea.Area8000);
    				break;
    			case 10:
    				Switch08KPRG(data, PRGArea.AreaA000);
    				break;
    			case 11:
    				Switch08KPRG(data, PRGArea.AreaC000);
    				break;
    			case 12:
    				switch (data & 3)
    				{
    				case 0:
    					Switch01KNMTFromMirroring(Mirroring.Vert);
    					break;
    				case 1:
    					Switch01KNMTFromMirroring(Mirroring.Horz);
    					break;
    				case 2:
    					Switch01KNMTFromMirroring(Mirroring.OneScA);
    					break;
    				case 3:
    					Switch01KNMTFromMirroring(Mirroring.OneScB);
    					break;
    				}
    				break;
    			case 13:
    				irq_count_enabled = (data & 0x80) == 128;
    				irq_trigger_enabled = (data & 1) == 1;
    				if (!irq_trigger_enabled)
    				{
    					NesEmu.IRQFlags &= -9;
    				}
    				break;
    			case 14:
    				irq_counter = (irq_counter & 0xFF00) | data;
    				break;
    			case 15:
    				irq_counter = (irq_counter & 0xFF) | (data << 8);
    				break;
    			}
    			break;
    		case 49152:
    			address_E000 = data & 0xF;
    			break;
    		case 57344:
    			switch (address_E000)
    			{
    			case 0:
    				snd_1.Write0(ref data);
    				break;
    			case 1:
    				snd_1.Write1(ref data);
    				break;
    			case 2:
    				snd_2.Write0(ref data);
    				break;
    			case 3:
    				snd_2.Write1(ref data);
    				break;
    			case 4:
    				snd_3.Write0(ref data);
    				break;
    			case 5:
    				snd_3.Write1(ref data);
    				break;
    			case 7:
    				snd_1.Enabled = (data & 1) == 0;
    				snd_2.Enabled = (data & 2) == 0;
    				snd_3.Enabled = (data & 4) == 0;
    				break;
    			case 8:
    				snd_1.Volume = (byte)(data & 0xFu);
    				break;
    			case 9:
    				snd_2.Volume = (byte)(data & 0xFu);
    				break;
    			case 10:
    				snd_3.Volume = (byte)(data & 0xFu);
    				break;
    			case 6:
    				break;
    			}
    			break;
    		}
    	}

    	internal override void OnCPUClock()
    	{
    		if (!irq_count_enabled)
    		{
    			return;
    		}
    		irq_counter--;
    		if (irq_counter <= 0)
    		{
    			irq_counter = 65535;
    			if (irq_trigger_enabled)
    			{
    				NesEmu.IRQFlags |= 8;
    			}
    		}
    	}

    	internal override double APUGetSample()
    	{
    		return audio_pulse_table[snd_1.output + snd_2.output] + audio_tnd_table[snd_3.output];
    	}

    	internal override void OnAPUClockSingle()
    	{
    		base.OnAPUClockSingle();
    		snd_1.ClockSingle();
    		snd_2.ClockSingle();
    		snd_3.ClockSingle();
    	}

    	internal override void APUApplyChannelsSettings()
    	{
    		base.APUApplyChannelsSettings();
    		snd_1.Outputable = MyNesMain.RendererSettings.Audio_ChannelEnabled_SUN1;
    		snd_2.Outputable = MyNesMain.RendererSettings.Audio_ChannelEnabled_SUN2;
    		snd_3.Outputable = MyNesMain.RendererSettings.Audio_ChannelEnabled_SUN3;
    	}

    	internal override void WriteStateData(ref BinaryWriter stream)
    	{
    		base.WriteStateData(ref stream);
    		stream.Write(address_A000);
    		stream.Write(address_E000);
    		stream.Write(irq_counter);
    		stream.Write(irq_count_enabled);
    		stream.Write(irq_trigger_enabled);
    		snd_1.SaveState(ref stream);
    		snd_2.SaveState(ref stream);
    		snd_3.SaveState(ref stream);
    	}

    	internal override void ReadStateData(ref BinaryReader stream)
    	{
    		base.ReadStateData(ref stream);
    		address_A000 = stream.ReadInt32();
    		address_E000 = stream.ReadInt32();
    		irq_counter = stream.ReadInt32();
    		irq_count_enabled = stream.ReadBoolean();
    		irq_trigger_enabled = stream.ReadBoolean();
    		snd_1.LoadState(ref stream);
    		snd_2.LoadState(ref stream);
    		snd_3.LoadState(ref stream);
    	}
    }
}