AxibugEmuOnline/OtherCore/MyNes.Standard2/MyNes.Core/Mapper048.cs

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2024-07-24 15:03:33 +08:00
using System.IO;
namespace MyNes.Core
{
[BoardInfo("Taito TC0190/TC0350", 48, true, true)]
internal class Mapper048 : Board
{
private bool MODE;
private bool irq_enabled;
private byte irq_counter;
private int old_irq_counter;
private byte irq_reload;
private bool irq_clear;
private bool mmc3_alt_behavior;
internal override void HardReset()
{
base.HardReset();
Switch16KPRG(PRG_ROM_16KB_Mask, PRGArea.AreaC000);
MODE = false;
if (IsGameFoundOnDB)
{
foreach (string chip in base.Chips)
{
if (chip.Contains("TC0350"))
{
MODE = true;
break;
}
}
}
irq_enabled = false;
irq_counter = 0;
irq_reload = byte.MaxValue;
old_irq_counter = 0;
mmc3_alt_behavior = false;
irq_clear = false;
}
internal override void WritePRG(ref ushort address, ref byte data)
{
if (!MODE)
{
switch (address & 0xE003)
{
case 32768:
Switch08KPRG(data, PRGArea.Area8000);
break;
case 32769:
Switch08KPRG(data, PRGArea.AreaA000);
break;
case 32770:
Switch02KCHR(data, CHRArea.Area0000);
break;
case 32771:
Switch02KCHR(data, CHRArea.Area0800);
break;
case 40960:
Switch01KCHR(data, CHRArea.Area1000);
break;
case 40961:
Switch01KCHR(data, CHRArea.Area1400);
break;
case 40962:
Switch01KCHR(data, CHRArea.Area1800);
break;
case 40963:
Switch01KCHR(data, CHRArea.Area1C00);
break;
case 49152:
irq_reload = (byte)(data ^ 0xFFu);
break;
case 49153:
if (mmc3_alt_behavior)
{
irq_clear = true;
}
irq_counter = 0;
break;
case 49154:
irq_enabled = false;
NesEmu.IRQFlags &= -9;
break;
case 49155:
irq_enabled = true;
break;
case 57344:
Switch01KNMTFromMirroring(((data & 0x40) == 64) ? Mirroring.Horz : Mirroring.Vert);
break;
}
}
else
{
switch (address & 0xA003)
{
case 32768:
Switch01KNMTFromMirroring(((data & 0x40) == 64) ? Mirroring.Horz : Mirroring.Vert);
Switch08KPRG(data & 0x3F, PRGArea.Area8000);
break;
case 32769:
Switch08KPRG(data & 0x3F, PRGArea.AreaA000);
break;
case 32770:
Switch02KCHR(data, CHRArea.Area0000);
break;
case 32771:
Switch02KCHR(data, CHRArea.Area0800);
break;
case 40960:
Switch01KCHR(data, CHRArea.Area1000);
break;
case 40961:
Switch01KCHR(data, CHRArea.Area1400);
break;
case 40962:
Switch01KCHR(data, CHRArea.Area1800);
break;
case 40963:
Switch01KCHR(data, CHRArea.Area1C00);
break;
}
}
}
internal override void OnPPUA12RaisingEdge()
{
if (!MODE)
{
old_irq_counter = irq_counter;
if (irq_counter == 0 || irq_clear)
{
irq_counter = irq_reload;
}
else
{
irq_counter--;
}
if ((!mmc3_alt_behavior || old_irq_counter != 0 || irq_clear) && irq_counter == 0 && irq_enabled)
{
NesEmu.IRQFlags |= 8;
}
irq_clear = false;
}
}
internal override void WriteStateData(ref BinaryWriter stream)
{
base.WriteStateData(ref stream);
stream.Write(irq_enabled);
stream.Write(irq_counter);
stream.Write(old_irq_counter);
stream.Write(irq_reload);
stream.Write(irq_clear);
}
internal override void ReadStateData(ref BinaryReader stream)
{
base.ReadStateData(ref stream);
irq_enabled = stream.ReadBoolean();
irq_counter = stream.ReadByte();
old_irq_counter = stream.ReadInt32();
irq_reload = stream.ReadByte();
irq_clear = stream.ReadBoolean();
}
}
}