AxibugEmuOnline/AxibugEmuOnline.Client/Assets/MyNes.Core/Mapper069.cs
2024-07-03 18:22:22 +08:00

260 lines
6.6 KiB
C#

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);
}
}
}