AxibugEmuOnline/AxibugEmuOnline.Client/Assets/MyNes.Core/Mapper018.cs
2024-07-03 18:22:22 +08:00

220 lines
6.2 KiB
C#

using System.IO;
namespace MyNes.Core
{
[BoardInfo("Jaleco SS8806", 18)]
internal class Mapper018 : Board
{
private int[] prg_reg;
private int[] chr_reg;
private int irqRelaod;
private int irqCounter;
private bool irqEnable;
private int irqMask;
internal override void HardReset()
{
base.HardReset();
Switch08KPRG(PRG_ROM_08KB_Mask, PRGArea.AreaE000);
prg_reg = new int[3];
chr_reg = new int[8];
}
internal override void WritePRG(ref ushort address, ref byte data)
{
switch (address & 0xF003)
{
case 32768:
prg_reg[0] = (prg_reg[0] & 0xF0) | (data & 0xF);
Switch08KPRG(prg_reg[0], PRGArea.Area8000);
break;
case 32769:
prg_reg[0] = (prg_reg[0] & 0xF) | ((data & 0xF) << 4);
Switch08KPRG(prg_reg[0], PRGArea.Area8000);
break;
case 32770:
prg_reg[1] = (prg_reg[1] & 0xF0) | (data & 0xF);
Switch08KPRG(prg_reg[1], PRGArea.AreaA000);
break;
case 32771:
prg_reg[1] = (prg_reg[1] & 0xF) | ((data & 0xF) << 4);
Switch08KPRG(prg_reg[1], PRGArea.AreaA000);
break;
case 36864:
prg_reg[2] = (prg_reg[2] & 0xF0) | (data & 0xF);
Switch08KPRG(prg_reg[2], PRGArea.AreaC000);
break;
case 36865:
prg_reg[2] = (prg_reg[2] & 0xF) | ((data & 0xF) << 4);
Switch08KPRG(prg_reg[2], PRGArea.AreaC000);
break;
case 40960:
chr_reg[0] = (chr_reg[0] & 0xF0) | (data & 0xF);
Switch01KCHR(chr_reg[0], CHRArea.Area0000);
break;
case 40961:
chr_reg[0] = (chr_reg[0] & 0xF) | ((data & 0xF) << 4);
Switch01KCHR(chr_reg[0], CHRArea.Area0000);
break;
case 40962:
chr_reg[1] = (chr_reg[1] & 0xF0) | (data & 0xF);
Switch01KCHR(chr_reg[1], CHRArea.Area0400);
break;
case 40963:
chr_reg[1] = (chr_reg[1] & 0xF) | ((data & 0xF) << 4);
Switch01KCHR(chr_reg[1], CHRArea.Area0400);
break;
case 45056:
chr_reg[2] = (chr_reg[2] & 0xF0) | (data & 0xF);
Switch01KCHR(chr_reg[2], CHRArea.Area0800);
break;
case 45057:
chr_reg[2] = (chr_reg[2] & 0xF) | ((data & 0xF) << 4);
Switch01KCHR(chr_reg[2], CHRArea.Area0800);
break;
case 45058:
chr_reg[3] = (chr_reg[3] & 0xF0) | (data & 0xF);
Switch01KCHR(chr_reg[3], CHRArea.Area0C00);
break;
case 45059:
chr_reg[3] = (chr_reg[3] & 0xF) | ((data & 0xF) << 4);
Switch01KCHR(chr_reg[3], CHRArea.Area0C00);
break;
case 49152:
chr_reg[4] = (chr_reg[4] & 0xF0) | (data & 0xF);
Switch01KCHR(chr_reg[4], CHRArea.Area1000);
break;
case 49153:
chr_reg[4] = (chr_reg[4] & 0xF) | ((data & 0xF) << 4);
Switch01KCHR(chr_reg[4], CHRArea.Area1000);
break;
case 49154:
chr_reg[5] = (chr_reg[5] & 0xF0) | (data & 0xF);
Switch01KCHR(chr_reg[5], CHRArea.Area1400);
break;
case 49155:
chr_reg[5] = (chr_reg[5] & 0xF) | ((data & 0xF) << 4);
Switch01KCHR(chr_reg[5], CHRArea.Area1400);
break;
case 53248:
chr_reg[6] = (chr_reg[6] & 0xF0) | (data & 0xF);
Switch01KCHR(chr_reg[6], CHRArea.Area1800);
break;
case 53249:
chr_reg[6] = (chr_reg[6] & 0xF) | ((data & 0xF) << 4);
Switch01KCHR(chr_reg[6], CHRArea.Area1800);
break;
case 53250:
chr_reg[7] = (chr_reg[7] & 0xF0) | (data & 0xF);
Switch01KCHR(chr_reg[7], CHRArea.Area1C00);
break;
case 53251:
chr_reg[7] = (chr_reg[7] & 0xF) | ((data & 0xF) << 4);
Switch01KCHR(chr_reg[7], CHRArea.Area1C00);
break;
case 57344:
irqRelaod = (irqRelaod & 0xFFF0) | (data & 0xF);
break;
case 57345:
irqRelaod = (irqRelaod & 0xFF0F) | ((data & 0xF) << 4);
break;
case 57346:
irqRelaod = (irqRelaod & 0xF0FF) | ((data & 0xF) << 8);
break;
case 57347:
irqRelaod = (irqRelaod & 0xFFF) | ((data & 0xF) << 12);
break;
case 61440:
irqCounter = irqRelaod;
NesEmu.IRQFlags &= -9;
break;
case 61441:
irqEnable = (data & 1) == 1;
if ((data & 8) == 8)
{
irqMask = 15;
}
else if ((data & 4) == 4)
{
irqMask = 255;
}
else if ((data & 2) == 2)
{
irqMask = 4095;
}
else
{
irqMask = 65535;
}
NesEmu.IRQFlags &= -9;
break;
case 61442:
switch (data & 3)
{
case 0:
Switch01KNMTFromMirroring(Mirroring.Horz);
break;
case 1:
Switch01KNMTFromMirroring(Mirroring.Vert);
break;
case 2:
Switch01KNMTFromMirroring(Mirroring.OneScA);
break;
case 3:
Switch01KNMTFromMirroring(Mirroring.OneScB);
break;
}
break;
}
}
internal override void OnCPUClock()
{
if (irqEnable && (irqCounter & irqMask) > 0 && (--irqCounter & irqMask) == 0)
{
irqEnable = false;
NesEmu.IRQFlags |= 8;
}
}
internal override void WriteStateData(ref BinaryWriter stream)
{
base.WriteStateData(ref stream);
for (int i = 0; i < prg_reg.Length; i++)
{
stream.Write(prg_reg[i]);
}
for (int j = 0; j < chr_reg.Length; j++)
{
stream.Write(chr_reg[j]);
}
stream.Write(irqRelaod);
stream.Write(irqCounter);
stream.Write(irqEnable);
stream.Write(irqMask);
}
internal override void ReadStateData(ref BinaryReader stream)
{
base.ReadStateData(ref stream);
for (int i = 0; i < prg_reg.Length; i++)
{
prg_reg[i] = stream.ReadInt32();
}
for (int j = 0; j < chr_reg.Length; j++)
{
chr_reg[j] = stream.ReadInt32();
}
irqRelaod = stream.ReadInt32();
irqCounter = stream.ReadInt32();
irqEnable = stream.ReadBoolean();
irqMask = stream.ReadInt32();
}
}
}