AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper048.cs
2024-08-05 00:44:30 +08:00

144 lines
2.9 KiB
C#

//////////////////////////////////////////////////////////////////////////
// Mapper048 Taito TC190V //
//////////////////////////////////////////////////////////////////////////
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 Mapper048 : Mapper
{
BYTE reg;
BYTE irq_enable;
BYTE irq_counter;
public Mapper048(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);
SetVROM_8K_Bank(0);
uint crc = nes.rom.GetPROM_CRC();
// if( crc == 0x547e6cc1 ) { // Flintstones - The Rescue of Dino & Hoppy(J)
// nes.SetRenderMethod( NES::POST_RENDER );
// }
}
//void Mapper048::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
switch (addr)
{
case 0x8000:
if (reg == 0)
{
if ((data & 0x40) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
}
SetPROM_8K_Bank(4, data);
break;
case 0x8001:
SetPROM_8K_Bank(5, data);
break;
case 0x8002:
SetVROM_2K_Bank(0, data);
break;
case 0x8003:
SetVROM_2K_Bank(2, data);
break;
case 0xA000:
SetVROM_1K_Bank(4, data);
break;
case 0xA001:
SetVROM_1K_Bank(5, data);
break;
case 0xA002:
SetVROM_1K_Bank(6, data);
break;
case 0xA003:
SetVROM_1K_Bank(7, data);
break;
case 0xC000:
irq_counter = data;
irq_enable = 0;
// nes.cpu.ClrIRQ( IRQ_MAPPER );
break;
case 0xC001:
irq_counter = data;
irq_enable = 1;
// irq_enable = data & 0x01;
// nes.cpu.ClrIRQ( IRQ_MAPPER );
break;
case 0xC002:
break;
case 0xC003:
break;
case 0xE000:
if ((data & 0x40) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
reg = 1;
break;
}
}
//void Mapper048::HSync(INT scanline)
public override void HSync(int scanline)
{
if ((scanline >= 0 && scanline <= 239))
{
if (nes.ppu.IsDispON())
{
if (irq_enable != 0)
{
if (irq_counter == 0xFF)
{
// nes.cpu.IRQ_NotPending();
// nes.cpu.SetIRQ( IRQ_MAPPER );
nes.cpu.SetIRQ(IRQ_TRIGGER2);
}
irq_counter++;
}
}
}
}
//void Mapper048::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = reg;
p[1] = irq_enable;
p[2] = irq_counter;
}
//void Mapper048::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;
}
}
}