AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper069.cs

177 lines
5.4 KiB
C#

//////////////////////////////////////////////////////////////////////////
// Mapper069 SunSoft FME-7 //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.Core.CPU;
using static VirtualNes.MMU;
using BYTE = System.Byte;
using INT = System.Int32;
namespace VirtualNes.Core
{
public class Mapper069 : Mapper
{
BYTE patch;
BYTE reg;
BYTE irq_enable;
INT irq_counter;
public Mapper069(NES parent) : base(parent)
{
}
public override void Reset()
{
reg = 0;
irq_enable = 0;
irq_counter = 0;
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
if (VROM_1K_SIZE != 0)
{
SetVROM_8K_Bank(0);
}
nes.apu.SelectExSound(32);
nes.SetIrqType(NES.IRQMETHOD.IRQ_CLOCK);
patch = 0;
uint crc = nes.rom.GetPROM_CRC();
if (crc == 0xfeac6916)
{ // Honoo no Toukyuuji - Dodge Danpei 2(J)
// nes.SetIrqType( NES::IRQ_HSYNC );
nes.SetRenderMethod(EnumRenderMethod.TILE_RENDER);
}
if (crc == 0xad28aef6)
{ // Dynamite Batman(J) / Dynamite Batman - Return of the Joker(U)
patch = 1;
}
}
//void Mapper069::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
switch (addr & 0xE000)
{
case 0x8000:
reg = data;
break;
case 0xA000:
switch (reg & 0x0F)
{
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x06:
case 0x07:
SetVROM_1K_Bank((byte)(reg & 0x07), data);
break;
case 0x08:
if (patch == 0 && (data & 0x40) == 0)
{
SetPROM_8K_Bank(3, data);
}
break;
case 0x09:
SetPROM_8K_Bank(4, data);
break;
case 0x0A:
SetPROM_8K_Bank(5, data);
break;
case 0x0B:
SetPROM_8K_Bank(6, data);
break;
case 0x0C:
data &= 0x03;
if (data == 0) SetVRAM_Mirror(VRAM_VMIRROR);
else if (data == 1) SetVRAM_Mirror(VRAM_HMIRROR);
else if (data == 2) SetVRAM_Mirror(VRAM_MIRROR4L);
else SetVRAM_Mirror(VRAM_MIRROR4H);
break;
case 0x0D:
irq_enable = data;
nes.cpu.ClrIRQ(IRQ_MAPPER);
break;
case 0x0E:
irq_counter = (irq_counter & 0xFF00) | data;
nes.cpu.ClrIRQ(IRQ_MAPPER);
break;
case 0x0F:
irq_counter = (irq_counter & 0x00FF) | (data << 8);
nes.cpu.ClrIRQ(IRQ_MAPPER);
break;
}
break;
case 0xC000:
case 0xE000:
nes.apu.ExWrite(addr, data);
break;
}
}
//void Mapper069::Clock(INT cycles)
public override void Clock(int cycles)
{
//if (irq_enable && (nes.GetIrqType() == NES::IRQ_CLOCK))
if (irq_enable != 0 && (nes.GetIrqType() == (int)NES.IRQMETHOD.IRQ_HSYNC))
{
irq_counter -= cycles;
if (irq_counter <= 0)
{
nes.cpu.SetIRQ(IRQ_MAPPER);
irq_enable = 0;
irq_counter = 0xFFFF;
}
}
}
//void Mapper069::HSync(INT scanline)
public override void HSync(int scanline)
{
if (irq_enable != 0 && (nes.GetIrqType() == (int)NES.IRQMETHOD.IRQ_HSYNC))
{
irq_counter -= 114;
if (irq_counter <= 0)
{
nes.cpu.SetIRQ(IRQ_MAPPER);
irq_enable = 0;
irq_counter = 0xFFFF;
}
}
}
//void Mapper069::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
//p[0] = reg;
//p[1] = irq_enable;
//*(INT*)&p[2] = irq_counter;
}
//void Mapper069::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
//reg = p[0];
//irq_enable = p[1];
//irq_counter = *(INT*)&p[2];
}
public override bool IsStateSave()
{
return true;
}
}
}