AxibugEmuOnline/AxibugEmuOnline.Client.Transplant/Assets/VirtualNes.Core/Mapper/Mapper168.cs

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//////////////////////////////////////////////////////////////////////////
// Mapper168 Subor (PPUExtLatch) //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using INT = System.Int32;
namespace VirtualNes.Core
{
public class Mapper168 : Mapper
{
byte reg5000, reg5200, reg5300;
byte PPU_SW, NT_data;
byte Rom_Type;
public Mapper168(NES parent) : base(parent) { }
public override bool IsStateSave()
{
return true;
}
public override void Reset()
{
reg5000 = 0;
reg5200 = 0;
reg5300 = 0;
PPU_SW = 0;
NT_data = 0;
nes.ppu.SetExtLatchMode(true);
SetPROM_16K_Bank(4, 0);
SetPROM_16K_Bank(6, 0);
Rom_Type = 0;
uint crc = nes.rom.GetPROM_CRC();
if (crc == 0x0A9808AE) //[Subor] Karaoke (C)
{
Rom_Type = 1;
SetPROM_32K_Bank(0);
nes.SetVideoMode(2 != 0);
}
if (crc == 0x12D61CE8) //[Subor] Subor V11.0 (C)
{
Rom_Type = 2;
}
}
public override byte ReadLow(ushort addr)
{
if (addr == 0x5300) return 0x8F; //返回0x8F跳过真人语音发声有关的程序段
return base.ReadLow(addr);
}
public override void WriteLow(ushort addr, byte data)
{
if (addr == 0x5000)
{
reg5000 = data;
SetBank_CPU();
}
else if (addr == 0x5200)
{
reg5200 = (byte)(data & 0x7);
SetBank_CPU();
}
else if (addr == 0x5300)
{
reg5300 = data;
}
else if (addr >= 0x6000)
{
CPU_MEM_BANK[addr >> 13][addr & 0x1FFF] = data;
}
}
public override void Write(ushort addr, byte data)
{
if (Rom_Type == 1)
{ //[Subor] Karaoke (C)
SetPROM_32K_Bank(data & 0x1F);
if ((data & 0x40) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
if ((data & 0xC0) != 0) PPU_SW = 1;
else PPU_SW = 0;
}
}
void SetBank_CPU()
{
if (reg5200 < 4) SetPROM_16K_Bank(4, reg5000);
else SetPROM_32K_Bank(reg5000);
switch (reg5200)
{
case 0:
SetVRAM_Mirror(VRAM_VMIRROR);
PPU_SW = 0;
break;
case 2:
SetVRAM_Mirror(VRAM_VMIRROR);
PPU_SW = 1;
break;
case 1:
case 3:
SetVRAM_Mirror(VRAM_HMIRROR);
PPU_SW = 0;
break;
case 5:
if (reg5000 == 4 && Rom_Type == 2)
{ //Special for [Subor] Subor V11.0 (C) - Tank (坦克大战)
nes.ppu.SetExtLatchMode(false);
SetVRAM_Mirror(VRAM_HMIRROR);
}
break;
}
}
public override void PPU_Latch(ushort addr)
{
if ((addr & 0xF000) == 0x2000)
{
NT_data = (byte)((addr >> 8) & 0x03);
}
}
public override void PPU_ExtLatch(ushort ntbladr, ref byte chr_l, ref byte chr_h, ref byte attr)
{
INT loopy_v = nes.ppu.GetPPUADDR();
INT loopy_y = nes.ppu.GetTILEY();
INT tileofs = (PPUREG[0] & PPU.PPU_BGTBL_BIT) << 8;
INT attradr = 0x23C0 + (loopy_v & 0x0C00) + ((loopy_v & 0x0380) >> 4);
INT attrsft = (ntbladr & 0x0040) >> 4;
ArrayRef<byte> pNTBL = PPU_MEM_BANK[ntbladr >> 10];
INT ntbl_x = ntbladr & 0x001F;
INT tileadr, ntb;
ntb = (ntbladr >> 10) & 3;
if (ntb == 2)
tileofs |= 0x1000;
else if (ntb != 0 && PPU_SW != 0)
tileofs |= 0x1000;
else
tileofs |= 0x0000;
attradr &= 0x3FF;
attr = (byte)(((pNTBL[attradr + (ntbl_x >> 2)] >> ((ntbl_x & 2) + attrsft)) & 3) << 2);
tileadr = tileofs + pNTBL[ntbladr & 0x03FF] * 0x10 + loopy_y;
chr_l = PPU_MEM_BANK[tileadr >> 10][tileadr & 0x03FF];
chr_h = PPU_MEM_BANK[tileadr >> 10][(tileadr & 0x03FF) + 8];
}
public override void SaveState(byte[] p)
{
p[0] = reg5000;
p[1] = reg5200;
}
public override void LoadState(byte[] p)
{
reg5000 = p[0];
reg5200 = p[1];
}
}
}