forked from sin365/AxibugEmuOnline
248 lines
7.2 KiB
C#
248 lines
7.2 KiB
C#
/////////////////////////////
|
|
// Mapper083 Cony //
|
|
//////////////////////////////////////////////////////////////////////////
|
|
using System;
|
|
using static VirtualNes.Core.CPU;
|
|
using static VirtualNes.MMU;
|
|
using BYTE = System.Byte;
|
|
using INT = System.Int32;
|
|
|
|
|
|
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;
|
|
BitConverter.GetBytes(chr_bank).CopyTo(p, 3);
|
|
p[7] = irq_enable;
|
|
//*(INT*)&p[8] = irq_counter;
|
|
BitConverter.GetBytes(irq_counter).CopyTo(p, 8);
|
|
}
|
|
|
|
//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];
|
|
chr_bank = BitConverter.ToInt32(p, 3);
|
|
irq_enable = p[7];
|
|
//irq_counter = *(INT*)&p[8];
|
|
irq_counter = BitConverter.ToInt32(p, 8);
|
|
}
|
|
|
|
public override bool IsStateSave()
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
}
|