AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper065.cs

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2024-08-05 00:44:30 +08:00
//////////////////////////////////////////////////////////////////////////
// Mapper065 Irem H3001 //
//////////////////////////////////////////////////////////////////////////
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 Mapper065 : Mapper
{
BYTE patch;
BYTE irq_enable;
INT irq_counter;
INT irq_latch;
public Mapper065(NES parent) : base(parent)
{
}
public override void Reset()
{
patch = 0;
// Kaiketsu Yanchamaru 3(J)
if (nes.rom.GetPROM_CRC() == 0xe30b7f64)
{
patch = 1;
}
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
if (VROM_8K_SIZE != 0)
{
SetVROM_8K_Bank(0);
}
irq_enable = 0;
irq_counter = 0;
}
//void Mapper065::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
switch (addr)
{
case 0x8000:
SetPROM_8K_Bank(4, data);
break;
case 0x9000:
if (patch == 0)
{
if ((data & 0x40) != 0) SetVRAM_Mirror(VRAM_VMIRROR);
else SetVRAM_Mirror(VRAM_HMIRROR);
}
break;
case 0x9001:
if (patch != 0)
{
if ((data & 0x80) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
}
break;
case 0x9003:
if (patch == 0)
{
irq_enable = (byte)(data & 0x8);
nes.cpu.ClrIRQ(IRQ_MAPPER);
}
break;
case 0x9004:
if (patch == 0)
{
irq_counter = irq_latch;
}
break;
case 0x9005:
if (patch != 0)
{
irq_counter = (BYTE)(data << 1);
irq_enable = data;
nes.cpu.ClrIRQ(IRQ_MAPPER);
}
else
{
irq_latch = (irq_latch & 0x00FF) | ((INT)data << 8);
}
break;
case 0x9006:
if (patch != 0)
{
irq_enable = 1;
}
else
{
irq_latch = (irq_latch & 0xFF00) | data;
}
break;
case 0xB000:
case 0xB001:
case 0xB002:
case 0xB003:
case 0xB004:
case 0xB005:
case 0xB006:
case 0xB007:
SetVROM_1K_Bank((byte)(addr & 0x0007), data);
break;
case 0xA000:
SetPROM_8K_Bank(5, data);
break;
case 0xC000:
SetPROM_8K_Bank(6, data);
break;
}
}
//void Mapper065::HSync(INT scanline)
public override void HSync(int scanline)
{
if (patch != 0)
{
if (irq_enable != 0)
{
if (irq_counter == 0)
{
// nes.cpu.IRQ_NotPending();
nes.cpu.SetIRQ(IRQ_MAPPER);
}
else
{
irq_counter--;
}
}
}
}
//void Mapper065::Clock(INT cycles)
public override void Clock(int cycles)
{
if (patch == 0)
{
if (irq_enable != 0)
{
if (irq_counter <= 0)
{
// nes.cpu.IRQ_NotPending();
nes.cpu.SetIRQ(IRQ_MAPPER);
}
else
{
irq_counter -= cycles;
}
}
}
}
//void Mapper065::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
//p[0] = irq_enable;
//*(INT*)&p[1] = irq_counter;
//*(INT*)&p[5] = irq_latch;
}
//void Mapper065::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
//irq_enable = p[0];
//irq_counter = *(INT*)&p[1];
//irq_latch = *(INT*)&p[5];
}
public override bool IsStateSave()
{
return true;
}
}
}