AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper182.cs

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2024-08-03 23:15:19 +08:00
//////////////////////////////////////////////////////////////////////////
// Mapper182 PC-SuperDonkeyKong //
//////////////////////////////////////////////////////////////////////////
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 Mapper182 : Mapper
{
BYTE reg;
BYTE irq_enable;
BYTE irq_counter;
public Mapper182(NES parent) : base(parent)
{
}
public override void Reset()
{
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
SetVROM_8K_Bank(0);
reg = 0;
irq_enable = 0;
irq_counter = 0;
}
//void Mapper182::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
switch (addr & 0xF003)
{
case 0x8001:
if ((data & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
break;
case 0xA000:
reg = (byte)(data & 0x07);
break;
case 0xC000:
switch (reg)
{
case 0:
SetVROM_1K_Bank(0, (data & 0xFE) + 0);
SetVROM_1K_Bank(1, (data & 0xFE) + 1);
break;
case 1:
SetVROM_1K_Bank(5, data);
break;
case 2:
SetVROM_1K_Bank(2, (data & 0xFE) + 0);
SetVROM_1K_Bank(3, (data & 0xFE) + 1);
break;
case 3:
SetVROM_1K_Bank(7, data);
break;
case 4:
SetPROM_8K_Bank(4, data);
break;
case 5:
SetPROM_8K_Bank(5, data);
break;
case 6:
SetVROM_1K_Bank(4, data);
break;
case 7:
SetVROM_1K_Bank(6, data);
break;
}
break;
case 0xE003:
irq_enable = data;
irq_counter = data;
nes.cpu.ClrIRQ(IRQ_MAPPER);
break;
}
}
//void Mapper182::HSync(INT scanline)
public override void HSync(int scanline)
{
if (irq_enable != 0)
{
if ((scanline >= 0 && scanline <= 239) && nes.ppu.IsDispON())
{
if ((--irq_counter) == 0)
{
irq_enable = 0;
irq_counter = 0;
// nes.cpu.IRQ_NotPending();
nes.cpu.SetIRQ(IRQ_MAPPER);
}
}
}
}
//void Mapper182::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = reg;
p[1] = irq_enable;
p[2] = irq_counter;
}
//void Mapper182::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
reg = p[0];
irq_enable = p[1];
irq_counter = p[2];
}
public override bool IsStateSave()
{
return true;
}
}
}