275 lines
8.5 KiB
C#
275 lines
8.5 KiB
C#
//////////////////////////////////////////////////////////////////////////
|
|
// Mapper023 Konami VRC2 type B //
|
|
//////////////////////////////////////////////////////////////////////////
|
|
using System;
|
|
using static VirtualNes.Core.CPU;
|
|
using static VirtualNes.MMU;
|
|
using BYTE = System.Byte;
|
|
using INT = System.Int32;
|
|
|
|
|
|
namespace VirtualNes.Core
|
|
{
|
|
public class Mapper023 : Mapper
|
|
{
|
|
|
|
ushort addrmask;
|
|
|
|
BYTE[] reg = new byte[9];
|
|
BYTE irq_enable;
|
|
BYTE irq_counter;
|
|
BYTE irq_latch;
|
|
INT irq_clock;
|
|
public Mapper023(NES parent) : base(parent)
|
|
{
|
|
}
|
|
|
|
|
|
public override void Reset()
|
|
{
|
|
addrmask = 0xFFFF;
|
|
|
|
for (byte i = 0; i < 8; i++)
|
|
{
|
|
reg[i] = i;
|
|
}
|
|
reg[8] = 0;
|
|
|
|
irq_enable = 0;
|
|
irq_counter = 0;
|
|
irq_latch = 0;
|
|
irq_clock = 0;
|
|
|
|
reg[9] = 1;
|
|
|
|
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
|
|
SetVROM_8K_Bank(0);
|
|
|
|
// nes.SetRenderMethod( NES::POST_RENDER );
|
|
|
|
uint crc = nes.rom.GetPROM_CRC();
|
|
|
|
if (crc == 0x93794634 // Akumajou Special Boku Dracula Kun(J)
|
|
|| crc == 0xc7829dae // Akumajou Special Boku Dracula Kun(T-Eng)
|
|
|| crc == 0xf82dc02f)
|
|
{ // Akumajou Special Boku Dracula Kun(T-Eng v1.02)
|
|
addrmask = 0xF00C;
|
|
nes.SetRenderMethod(EnumRenderMethod.POST_ALL_RENDER);
|
|
}
|
|
if (crc == 0xdd53c4ae)
|
|
{ // Tiny Toon Adventures(J)
|
|
nes.SetRenderMethod(EnumRenderMethod.POST_ALL_RENDER);
|
|
}
|
|
}
|
|
|
|
//void Mapper023::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 & addrmask)
|
|
{
|
|
case 0x8000:
|
|
case 0x8004:
|
|
case 0x8008:
|
|
case 0x800C:
|
|
if (reg[8] != 0)
|
|
{
|
|
SetPROM_8K_Bank(6, data);
|
|
}
|
|
else
|
|
{
|
|
SetPROM_8K_Bank(4, data);
|
|
}
|
|
break;
|
|
|
|
case 0x9000:
|
|
if (data != 0xFF)
|
|
{
|
|
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 0x9008:
|
|
reg[8] = (byte)(data & 0x02);
|
|
break;
|
|
|
|
case 0xA000:
|
|
case 0xA004:
|
|
case 0xA008:
|
|
case 0xA00C:
|
|
SetPROM_8K_Bank(5, data);
|
|
break;
|
|
|
|
case 0xB000:
|
|
reg[0] = (byte)((reg[0] & 0xF0) | (data & 0x0F));
|
|
SetVROM_1K_Bank(0, reg[0]);
|
|
break;
|
|
case 0xB001:
|
|
case 0xB004:
|
|
reg[0] = ((byte)((reg[0] & 0x0F) | ((data & 0x0F) << 4)));
|
|
SetVROM_1K_Bank(0, reg[0]);
|
|
break;
|
|
|
|
case 0xB002:
|
|
case 0xB008:
|
|
reg[1] = (byte)((reg[1] & 0xF0) | (data & 0x0F));
|
|
SetVROM_1K_Bank(1, reg[1]);
|
|
break;
|
|
|
|
case 0xB003:
|
|
case 0xB00C:
|
|
reg[1] = (byte)((reg[1] & 0x0F) | ((data & 0x0F) << 4));
|
|
SetVROM_1K_Bank(1, reg[1]);
|
|
break;
|
|
|
|
case 0xC000:
|
|
reg[2] = (byte)((reg[2] & 0xF0) | (data & 0x0F));
|
|
SetVROM_1K_Bank(2, reg[2]);
|
|
break;
|
|
|
|
case 0xC001:
|
|
case 0xC004:
|
|
reg[2] = (byte)((reg[2] & 0x0F) | ((data & 0x0F) << 4));
|
|
SetVROM_1K_Bank(2, reg[2]);
|
|
break;
|
|
|
|
case 0xC002:
|
|
case 0xC008:
|
|
reg[3] = (byte)((reg[3] & 0xF0) | (data & 0x0F));
|
|
SetVROM_1K_Bank(3, reg[3]);
|
|
break;
|
|
|
|
case 0xC003:
|
|
case 0xC00C:
|
|
reg[3] = (byte)((reg[3] & 0x0F) | ((data & 0x0F) << 4));
|
|
SetVROM_1K_Bank(3, reg[3]);
|
|
break;
|
|
|
|
case 0xD000:
|
|
reg[4] = (byte)((reg[4] & 0xF0) | (data & 0x0F));
|
|
SetVROM_1K_Bank(4, reg[4]);
|
|
break;
|
|
|
|
case 0xD001:
|
|
case 0xD004:
|
|
reg[4] = (byte)((reg[4] & 0x0F) | ((data & 0x0F) << 4));
|
|
SetVROM_1K_Bank(4, reg[4]);
|
|
break;
|
|
|
|
case 0xD002:
|
|
case 0xD008:
|
|
reg[5] = (byte)((reg[5] & 0xF0) | (data & 0x0F));
|
|
SetVROM_1K_Bank(5, reg[5]);
|
|
break;
|
|
|
|
case 0xD003:
|
|
case 0xD00C:
|
|
reg[5] = (byte)((reg[5] & 0x0F) | ((data & 0x0F) << 4));
|
|
SetVROM_1K_Bank(5, reg[5]);
|
|
break;
|
|
|
|
case 0xE000:
|
|
reg[6] = (byte)((reg[6] & 0xF0) | (data & 0x0F));
|
|
SetVROM_1K_Bank(6, reg[6]);
|
|
break;
|
|
|
|
case 0xE001:
|
|
case 0xE004:
|
|
reg[6] = (byte)((reg[6] & 0x0F) | ((data & 0x0F) << 4));
|
|
SetVROM_1K_Bank(6, reg[6]);
|
|
break;
|
|
|
|
case 0xE002:
|
|
case 0xE008:
|
|
reg[7] = (byte)((reg[7] & 0xF0) | (data & 0x0F));
|
|
SetVROM_1K_Bank(7, reg[7]);
|
|
break;
|
|
|
|
case 0xE003:
|
|
case 0xE00C:
|
|
reg[7] = ((byte)((reg[7] & 0x0F) | ((data & 0x0F) << 4)));
|
|
SetVROM_1K_Bank(7, reg[7]);
|
|
break;
|
|
|
|
case 0xF000:
|
|
irq_latch = (byte)((irq_latch & 0xF0) | (data & 0x0F));
|
|
nes.cpu.ClrIRQ(IRQ_MAPPER);
|
|
break;
|
|
case 0xF004:
|
|
irq_latch = (byte)((irq_latch & 0x0F) | ((data & 0x0F) << 4));
|
|
nes.cpu.ClrIRQ(IRQ_MAPPER);
|
|
break;
|
|
|
|
case 0xF008:
|
|
irq_enable = (byte)(data & 0x03);
|
|
irq_counter = irq_latch;
|
|
irq_clock = 0;
|
|
nes.cpu.ClrIRQ(IRQ_MAPPER);
|
|
break;
|
|
|
|
case 0xF00C:
|
|
irq_enable = (byte)((irq_enable & 0x01) * 3);
|
|
nes.cpu.ClrIRQ(IRQ_MAPPER);
|
|
break;
|
|
}
|
|
}
|
|
|
|
//void Mapper023::Clock(INT cycles)
|
|
public override void Clock(int cycles)
|
|
{
|
|
if ((irq_enable & 0x02) != 0)
|
|
{
|
|
irq_clock += cycles * 3;
|
|
while (irq_clock >= 341)
|
|
{
|
|
irq_clock -= 341;
|
|
irq_counter++;
|
|
if (irq_counter == 0)
|
|
{
|
|
irq_counter = irq_latch;
|
|
nes.cpu.SetIRQ(IRQ_MAPPER);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//void Mapper023::SaveState(LPBYTE p)
|
|
public override void SaveState(byte[] p)
|
|
{
|
|
for (INT i = 0; i < 9; i++)
|
|
{
|
|
p[i] = reg[i];
|
|
}
|
|
p[9] = irq_enable;
|
|
p[10] = irq_counter;
|
|
p[11] = irq_latch;
|
|
//*(INT*)&p[12] = irq_clock;
|
|
BitConverter.GetBytes(irq_clock).CopyTo(p, 12);
|
|
}
|
|
|
|
//void Mapper023::LoadState(LPBYTE p)
|
|
public override void LoadState(byte[] p)
|
|
{
|
|
for (INT i = 0; i < 9; i++)
|
|
{
|
|
reg[i] = p[i];
|
|
}
|
|
irq_enable = p[9];
|
|
irq_counter = p[10];
|
|
irq_latch = p[11];
|
|
//irq_clock = *(INT*)&p[12];
|
|
irq_clock = BitConverter.ToInt32(p, 12);
|
|
}
|
|
|
|
|
|
public override bool IsStateSave()
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
}
|