AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper083.cs
2024-08-05 00:05:15 +08:00

244 lines
4.8 KiB
C#

/////////////////////////////
// Mapper083 Cony //
//////////////////////////////////////////////////////////////////////////
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 Mapper083 : Mapper
{
BYTE[] reg = new byte[3];
INT chr_bank;
BYTE irq_enable;
INT irq_counter;
BYTE patch;
public Mapper083(NES parent) : base(parent)
{
}
public override void Reset()
{
for (INT i = 0; i < 3; i++)
{
reg[i] = 0x00;
}
if (PROM_8K_SIZE >= 32)
{
SetPROM_32K_Bank(0, 1, 30, 31);
reg[1] = 0x30;
}
else
{
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
}
if (VROM_1K_SIZE != 0)
{
SetVROM_8K_Bank(0);
}
chr_bank = 0;
irq_enable = 0; // Disable
irq_counter = 0;
patch = 0;
if (nes.rom.GetPROM_CRC() == 0x1461D1F8)
{
patch = 1;
}
}
//BYTE Mapper083::ReadLow(WORD addr)
public override byte ReadLow(ushort addr)
{
if ((addr & 0x5100) == 0x5100)
{
return reg[2];
}
else if (addr >= 0x6000)
{
return base.ReadLow(addr);
}
return (BYTE)(addr >> 8);
}
//void Mapper083::WriteLow(WORD addr, BYTE data)
public override void WriteLow(ushort addr, byte data)
{
//DEBUGOUT( "MPRWR A=%04X D=%02X L=%3d CYC=%d\n", addr&0xFFFF, data&0xFF, nes.GetScanline(), nes.cpu.GetTotalCycles() );
switch (addr)
{
case 0x5101:
case 0x5102:
case 0x5103:
reg[2] = data;
break;
}
if (addr >= 0x6000)
{
base.WriteLow(addr, data);
}
}
//void Mapper083::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
//DEBUGOUT( "MPRWR A=%04X D=%02X L=%3d CYC=%d\n", addr&0xFFFF, data&0xFF, nes.GetScanline(), nes.cpu.GetTotalCycles() );
switch (addr)
{
case 0x8000:
case 0xB000:
case 0xB0FF:
case 0xB1FF:
reg[0] = data;
chr_bank = (data & 0x30) << 4;
SetPROM_16K_Bank(4, data);
SetPROM_16K_Bank(6, (data & 0x30) | 0x0F);
break;
case 0x8100:
reg[1] = (byte)(data & 0x80);
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 0x8200:
irq_counter = (irq_counter & 0xFF00) | (INT)data;
// nes.cpu.ClrIRQ( IRQ_MAPPER );
break;
case 0x8201:
irq_counter = (irq_counter & 0x00FF) | ((INT)data << 8);
irq_enable = reg[1];
// nes.cpu.ClrIRQ( IRQ_MAPPER );
break;
case 0x8300:
SetPROM_8K_Bank(4, data);
break;
case 0x8301:
SetPROM_8K_Bank(5, data);
break;
case 0x8302:
SetPROM_8K_Bank(6, data);
break;
case 0x8310:
if (patch != 0)
{
SetVROM_2K_Bank(0, chr_bank | data);
}
else
{
SetVROM_1K_Bank(0, chr_bank | data);
}
break;
case 0x8311:
if (patch != 0)
{
SetVROM_2K_Bank(2, chr_bank | data);
}
else
{
SetVROM_1K_Bank(1, chr_bank | data);
}
break;
case 0x8312:
SetVROM_1K_Bank(2, chr_bank | data);
break;
case 0x8313:
SetVROM_1K_Bank(3, chr_bank | data);
break;
case 0x8314:
SetVROM_1K_Bank(4, chr_bank | data);
break;
case 0x8315:
SetVROM_1K_Bank(5, chr_bank | data);
break;
case 0x8316:
if (patch != 0)
{
SetVROM_2K_Bank(4, chr_bank | data);
}
else
{
SetVROM_1K_Bank(6, chr_bank | data);
}
break;
case 0x8317:
if (patch != 0)
{
SetVROM_2K_Bank(6, chr_bank | data);
}
else
{
SetVROM_1K_Bank(7, chr_bank | data);
}
break;
case 0x8318:
SetPROM_16K_Bank(4, (reg[0] & 0x30) | data);
break;
}
}
//void Mapper083::HSync(INT scanline)
public override void HSync(int scanline)
{
if (irq_enable != 0)
{
if (irq_counter <= 113)
{
// nes.cpu.IRQ();
irq_enable = 0;
// nes.cpu.SetIRQ( IRQ_MAPPER );
nes.cpu.SetIRQ(IRQ_TRIGGER);
}
else
{
irq_counter -= 113;
}
}
}
//void Mapper083::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
//p[0] = reg[0];
//p[1] = reg[1];
//p[2] = reg[2];
//*(INT*)&p[3] = chr_bank;
//p[7] = irq_enable;
//*(INT*)&p[8] = irq_counter;
}
//void Mapper083::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
//reg[0] = p[0];
//reg[1] = p[1];
//reg[2] = p[2];
//chr_bank = *(INT*)&p[3];
//irq_enable = p[7];
//irq_counter = *(INT*)&p[8];
}
public override bool IsStateSave()
{
return true;
}
}
}