AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper085.cs
2024-08-05 00:05:15 +08:00

239 lines
4.3 KiB
C#

//////////////////////////////////////////////////////////////////////////
// Mapper085 Konami VRC7 //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using static VirtualNes.Core.CPU;
using INT = System.Int32;
using BYTE = System.Byte;
using System;
using Codice.CM.Client.Differences;
namespace VirtualNes.Core
{
public class Mapper085 : Mapper
{
BYTE irq_enable;
BYTE irq_counter;
BYTE irq_latch;
INT irq_clock;
public Mapper085(NES parent) : base(parent)
{
}
public override void Reset()
{
irq_enable = 0;
irq_counter = 0;
irq_latch = 0;
irq_clock = 0;
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
if (VROM_1K_SIZE != 0)
{
SetVROM_8K_Bank(0);
}
else
{
SetCRAM_8K_Bank(0);
}
#if FALSE//0
// DWORD crc = nes.rom.GetPROM_CRC();
// if( crc == 0x1aa0479c ) { // For Tiny Toon Adventures 2 - Montana Land he Youkoso(J)
// nes.SetRenderMethod( NES::PRE_RENDER );
// }
// if( crc == 0x33ce3ff0 ) { // For Lagrange Point(J)
// nes.SetRenderMethod( NES::TILE_RENDER );
// }
#endif
nes.apu.SelectExSound(2);
}
//void Mapper085::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
switch (addr & 0xF038)
{
case 0x8000:
SetPROM_8K_Bank(4, data);
break;
case 0x8008:
case 0x8010:
SetPROM_8K_Bank(5, data);
break;
case 0x9000:
SetPROM_8K_Bank(6, data);
break;
case 0x9010:
case 0x9030:
nes.apu.ExWrite(addr, data);
break;
case 0xA000:
if (VROM_1K_SIZE != 0)
{
SetVROM_1K_Bank(0, data);
}
else
{
SetCRAM_1K_Bank(0, data);
}
break;
case 0xA008:
case 0xA010:
if (VROM_1K_SIZE != 0)
{
SetVROM_1K_Bank(1, data);
}
else
{
SetCRAM_1K_Bank(1, data);
}
break;
case 0xB000:
if (VROM_1K_SIZE != 0)
{
SetVROM_1K_Bank(2, data);
}
else
{
SetCRAM_1K_Bank(2, data);
}
break;
case 0xB008:
case 0xB010:
if (VROM_1K_SIZE != 0)
{
SetVROM_1K_Bank(3, data);
}
else
{
SetCRAM_1K_Bank(3, data);
}
break;
case 0xC000:
if (VROM_1K_SIZE != 0)
{
SetVROM_1K_Bank(4, data);
}
else
{
SetCRAM_1K_Bank(4, data);
}
break;
case 0xC008:
case 0xC010:
if (VROM_1K_SIZE != 0)
{
SetVROM_1K_Bank(5, data);
}
else
{
SetCRAM_1K_Bank(5, data);
}
break;
case 0xD000:
if (VROM_1K_SIZE != 0)
{
SetVROM_1K_Bank(6, data);
}
else
{
SetCRAM_1K_Bank(6, data);
}
break;
case 0xD008:
case 0xD010:
if (VROM_1K_SIZE != 0)
{
SetVROM_1K_Bank(7, data);
}
else
{
SetCRAM_1K_Bank(7, data);
}
break;
case 0xE000:
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 0xE008:
case 0xE010:
irq_latch = data;
break;
case 0xF000:
irq_enable = (byte)(data & 0x03);
irq_counter = irq_latch;
irq_clock = 0;
nes.cpu.ClrIRQ(IRQ_MAPPER);
break;
case 0xF008:
case 0xF010:
irq_enable = (byte)((irq_enable & 0x01) * 3);
nes.cpu.ClrIRQ(IRQ_MAPPER);
break;
}
}
//void Mapper085::Clock(INT cycles)
public override void Clock(int cycles)
{
if ((irq_enable & 0x02) != 0)
{
irq_clock += cycles * 4;
while (irq_clock >= 455)
{
irq_clock -= 455;
irq_counter++;
if (irq_counter == 0)
{
irq_counter = irq_latch;
nes.cpu.SetIRQ(IRQ_MAPPER);
}
}
}
}
//void Mapper085::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
//p[0] = irq_enable;
//p[1] = irq_counter;
//p[2] = irq_latch;
//*((INT*)&p[4]) = irq_clock;
}
//void Mapper085::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
//irq_enable = p[0];
//irq_counter = p[1];
//irq_latch = p[2];
//irq_clock = *((INT*)&p[4]);
}
public override bool IsStateSave()
{
return true;
}
}
}