AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper190.cs
2024-08-03 23:15:19 +08:00

318 lines
11 KiB
C#

//////////////////////////////////////////////////////////////
// Mapper190 Nintendo MMC3 //
//////////////////////////////////////////////////////////////////////////
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 Mapper190 : Mapper
{
BYTE cbase; /* PowerOn OR RESET : cbase=0 */
BYTE mp190_lcchk; /* PowerOn OR RESET */
BYTE mp190_lcmd;
BYTE mp190_cmd;
BYTE irq_enable;
BYTE irq_counter;
BYTE irq_latch;
BYTE lowoutdata;
public Mapper190(NES parent) : base(parent)
{
}
public override void Reset()
{
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
// DWORD crc = nes.rom.GetPROM_CRC();
// if( crc == 0x6F3D187A ) {
// Temp_Buf=0; //Kof96
// } else {
// Temp_Buf=1; //ST97
// }
irq_enable = 0;
irq_counter = 0;
cbase = 0; /* PowerOn OR RESET : cbase=0 */
mp190_lcchk = 0; /* PowerOn OR RESET */
mp190_lcmd = 1;
}
//void Mapper190::WriteLow(WORD addr, BYTE data)
public override void WriteLow(ushort addr, byte data)
{
/* For Initial Copy Protect check (KOF'96) */
if (addr == 0x5000)
{
mp190_lcmd = data;
switch (data)
{
case 0xE0:
SetPROM_32K_Bank(0);
break;
case 0xEE:
SetPROM_32K_Bank(3);
break;
}
}
if ((addr == 0x5001) && (mp190_lcmd == 0x00))
{
SetPROM_32K_Bank(7);
}
if (addr == 0x5080)
{
switch (data)
{
case 0x1: lowoutdata = 0x83; break;
case 0x2: lowoutdata = 0x42; break;
case 0x3: lowoutdata = 0x00; break;
}
}
CPU_MEM_BANK[addr >> 13][addr & 0x1FFF] = data;
}
//BYTE Mapper190::ReadLow(WORD addr)
public override byte ReadLow(ushort addr)
{
switch (addr)
{
case 0x5000:
return lowoutdata;
default:
return CPU_MEM_BANK[addr >> 13][addr & 0x1FFF];
}
}
//void Mapper190::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
switch (addr & 0xE003)
{
case 0x8000:
mp190_cmd = data;
if ((mp190_cmd & 0x80) != 0)
cbase = 1;
else
cbase = 0;
break;
case 0x8003: /* for Street Fighter Zero 2 '97 */
mp190_lcchk = data;
switch (data)
{
case 0x28:
SetPROM_8K_Bank(4, 0x1F);
SetPROM_8K_Bank(5, 0x1F);
SetPROM_8K_Bank(6, 0x17);
SetPROM_8K_Bank(7, 0x1F);
break;
case 0x2A:
SetPROM_8K_Bank(4, 0x1F);
SetPROM_8K_Bank(5, 0x0F);
SetPROM_8K_Bank(6, 0x17);
SetPROM_8K_Bank(7, 0x1F);
break;
case 0x06:
SetPROM_8K_Bank(4, 0x1E);
SetPROM_8K_Bank(5, 0x1F);
SetPROM_8K_Bank(6, 0x1F);
SetPROM_8K_Bank(7, 0x1F);
break;
}
break;
case 0x8001:
if ((mp190_lcchk == 0x6) || (mp190_lcmd == 0x0))
{
switch (mp190_cmd & 0x07)
{
case 0:
if (cbase == 0)
{
SetVROM_1K_Bank(0, data + 0x100);
SetVROM_1K_Bank(1, data + 0x101);
}
else
{
SetVROM_1K_Bank(4, data + 0x100);
SetVROM_1K_Bank(5, data + 0x101);
}
break;
case 1:
if (cbase == 0)
{
SetVROM_1K_Bank(2, data + 0x100);
SetVROM_1K_Bank(3, data + 0x101);
}
else
{
SetVROM_1K_Bank(6, data + 0x100);
SetVROM_1K_Bank(7, data + 0x101);
}
break;
case 2:
if (cbase == 0)
{
SetVROM_1K_Bank(4, data);
}
else
{
SetVROM_1K_Bank(0, data);
}
break;
case 3:
if (cbase == 0)
{
SetVROM_1K_Bank(5, data);
}
else
{
SetVROM_1K_Bank(1, data);
}
break;
case 4:
if (cbase == 0)
{
SetVROM_1K_Bank(6, data);
}
else
{
SetVROM_1K_Bank(2, data);
}
break;
case 5:
if (cbase == 0)
{
SetVROM_1K_Bank(7, data);
}
else
{
SetVROM_1K_Bank(3, data);
}
break;
case 6:
data = (byte)(data & ((PROM_8K_SIZE * 2) - 1));
if ((mp190_lcmd & 0x40) != 0)
{
SetPROM_8K_Bank(6, data);
SetPROM_8K_Bank(4, (PROM_8K_SIZE - 1) * 2);
}
else
{
SetPROM_8K_Bank(4, data);
SetPROM_8K_Bank(6, (PROM_8K_SIZE - 1) * 2);
}
break;
case 7:
data = (byte)(data & ((PROM_8K_SIZE * 2) - 1));
if ((mp190_lcmd & 0x40) != 0)
{
SetPROM_8K_Bank(5, data);
SetPROM_8K_Bank(4, (PROM_8K_SIZE - 1) * 2);
}
else
{
SetPROM_8K_Bank(5, data);
SetPROM_8K_Bank(6, (PROM_8K_SIZE - 1) * 2);
}
break;
}
}
break;
case 0xA000:
if ((data & 0x1) == 0x1)
SetVRAM_Mirror(VRAM_HMIRROR);
else
SetVRAM_Mirror(VRAM_VMIRROR);
break;
case 0xA001:
break;
case 0xC000:
irq_counter = (byte)(data - 1);
break;
case 0xC001:
irq_latch = (byte)(data - 1);
break;
case 0xC002:
irq_counter = data;
break;
case 0xC003:
irq_latch = data;
break;
case 0xE000:
irq_counter = irq_latch;
irq_enable = 0;
nes.cpu.ClrIRQ(IRQ_MAPPER);
break;
case 0xE001:
irq_enable = 1;
break;
case 0xE002:
irq_counter = irq_latch;
irq_enable = 0;
nes.cpu.ClrIRQ(IRQ_MAPPER);
break;
case 0xE003:
irq_enable = 1;
irq_counter = irq_counter;
break;
}
}
//void Mapper190::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--) == 0)
{
// nes.cpu.IRQ_NotPending();
nes.cpu.SetIRQ(IRQ_MAPPER);
}
}
}
}
}
//void Mapper190::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = irq_enable;
p[1] = irq_counter;
p[2] = irq_latch;
p[3] = cbase;
p[4] = mp190_lcchk;
p[5] = mp190_lcmd;
p[6] = mp190_cmd;
p[7] = lowoutdata;
}
//void Mapper190::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
irq_enable = p[0];
irq_counter = p[1];
irq_latch = p[2];
cbase = p[3];
mp190_lcchk = p[4];
mp190_lcmd = p[5];
mp190_cmd = p[6];
lowoutdata = p[7];
}
public override bool IsStateSave()
{
return true;
}
}
}