AxibugEmuOnline/Core/VirtualNes.Core/Mapper/Mapper033.cs

//////////////////////////////////////////////////////////////////////////
// Mapper033  Taito TC0190                                              //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.Core.CPU;
using static VirtualNes.MMU;
using BYTE = System.Byte;
using INT = System.Int32;


namespace VirtualNes.Core
{
    public class Mapper033 : Mapper
    {
        BYTE[] reg = new byte[7];

        BYTE patch;
        BYTE irq_enable;
        BYTE irq_counter;
        BYTE irq_latch;
        public Mapper033(NES parent) : base(parent)
        {
        }


        public override void Reset()
        {
            patch = 0;

            irq_enable = 0;
            irq_counter = 0;
            irq_latch = 0;

            reg[0] = 0;
            reg[1] = 2;
            reg[2] = 4;
            reg[3] = 5;
            reg[4] = 6;
            reg[5] = 7;
            reg[6] = 1;

            SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);

            if (VROM_8K_SIZE != 0)
            {
                SetBank();
            }

            uint crc = nes.rom.GetPROM_CRC();
            // Check For Old #33 games.... (CRC code by NesToy)
            if (crc == 0x5e9bc161       // Akira(J)
             || crc == 0xecdbafa4       // Bakushou!! Jinsei Gekijou(J)
             || crc == 0x59cd0c31       // Don Doko Don(J)
             || crc == 0x837c1342       // Golf Ko Open(J)
             || crc == 0x42d893e4       // Operation Wolf(J)
             || crc == 0x1388aeb9       // Operation Wolf(U)
             || crc == 0x07ee6d8f       // Power Blazer(J)
             || crc == 0x5193fb54       // Takeshi no Sengoku Fuuunji(J)
             || crc == 0xa71c3452)
            {   // Insector X(J)
                patch = 1;
            }

            nes.SetRenderMethod(EnumRenderMethod.PRE_RENDER);

            if (crc == 0x202df297)
            {   // Captain Saver(J)
                nes.SetRenderMethod(EnumRenderMethod.TILE_RENDER);
            }
            if (crc == 0x63bb86b5)
            {   // The Jetsons(J)
                nes.SetRenderMethod(EnumRenderMethod.TILE_RENDER);
            }
        }

        //void Mapper033::Write(WORD addr, BYTE data)
        public override void Write(ushort addr, byte data)
        {
            //	LOG( "Mapper033 addr=%04X data=%02X", addr&0xFFFF, data&0xFF );

            switch (addr)
            {
                case 0x8000:
                    if (patch != 0)
                    {
                        if ((data & 0x40) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
                        else SetVRAM_Mirror(VRAM_VMIRROR);
                        SetPROM_8K_Bank(4, data & 0x1F);
                    }
                    else
                    {
                        SetPROM_8K_Bank(4, data);
                    }
                    break;
                case 0x8001:
                    if (patch != 0)
                    {
                        SetPROM_8K_Bank(5, data & 0x1F);
                    }
                    else
                    {
                        SetPROM_8K_Bank(5, data);
                    }
                    break;

                case 0x8002:
                    reg[0] = data;
                    SetBank();
                    break;
                case 0x8003:
                    reg[1] = data;
                    SetBank();
                    break;
                case 0xA000:
                    reg[2] = data;
                    SetBank();
                    break;
                case 0xA001:
                    reg[3] = data;
                    SetBank();
                    break;
                case 0xA002:
                    reg[4] = data;
                    SetBank();
                    break;
                case 0xA003:
                    reg[5] = data;
                    SetBank();
                    break;

#if FLASE//0
		case	0xC003:
		case	0xE003:
			reg[6] = data;
			SetBank();
			break;

		case	0xC000:
			irq_counter = data;
//			nes.cpu.ClrIRQ( IRQ_MAPPER );
			break;

		case	0xC001:
		case	0xC002:
		case	0xE001:
		case	0xE002:
			irq_enable = data;
//			nes.cpu.ClrIRQ( IRQ_MAPPER );
			break;
#else
                case 0xC000:
                    irq_latch = data;
                    irq_counter = irq_latch;
                    break;
                case 0xC001:
                    irq_counter = irq_latch;
                    break;
                case 0xC002:
                    irq_enable = 1;
                    break;
                case 0xC003:
                    irq_enable = 0;
                    break;

                case 0xE001:
                case 0xE002:
                case 0xE003:
                    break;
#endif

                case 0xE000:
                    if ((data & 0x40) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
                    else SetVRAM_Mirror(VRAM_VMIRROR);
                    break;
            }
        }

        //void Mapper033::HSync(INT scanline)
        public override void HSync(int scanline)
        {
#if FALSE//0
//	nes.cpu.ClrIRQ( IRQ_MAPPER );
	if( scanline >= 0 && scanline <= 239 ) {
		if( nes.ppu.IsDispON() ) {
			if( irq_enable ) {
				if( irq_counter == 0xFF ) {
					irq_enable  = 0;
					irq_counter = 0;
//					nes.cpu.SetIRQ( IRQ_MAPPER );
					nes.cpu.SetIRQ( IRQ_TRIGGER );
				} else {
					irq_counter++;
				}
			}
		}
	}
#else
            if (scanline >= 0 && scanline <= 239 && nes.ppu.IsDispON())
            {
                if (irq_enable != 0)
                {
                    if (++irq_counter == 0)
                    {
                        irq_enable = 0;
                        irq_counter = 0;
                        nes.cpu.SetIRQ(IRQ_TRIGGER);
                    }
                }
            }
#endif
        }

        void SetBank()
        {
            SetVROM_2K_Bank(0, reg[0]);
            SetVROM_2K_Bank(2, reg[1]);

            //	if( reg[6] & 0x01 ) {
            SetVROM_1K_Bank(4, reg[2]);
            SetVROM_1K_Bank(5, reg[3]);
            SetVROM_1K_Bank(6, reg[4]);
            SetVROM_1K_Bank(7, reg[5]);
            //	} else {
            //		SetVROM_2K_Bank( 4, reg[0] );
            //		SetVROM_2K_Bank( 6, reg[1] );
            //	}
        }

        //void Mapper033::SaveState(LPBYTE p)
        public override void SaveState(byte[] p)
        {
            for (INT i = 0; i < 7; i++)
            {
                p[i] = reg[i];
            }

            p[7] = irq_enable;
            p[8] = irq_counter;
            p[9] = irq_latch;
        }

        //void Mapper033::LoadState(LPBYTE p)
        public override void LoadState(byte[] p)
        {
            for (INT i = 0; i < 7; i++)
            {
                reg[i] = p[i];
            }

            irq_enable = p[7];
            irq_counter = p[8];
            irq_latch = p[9];
        }

        public override bool IsStateSave()
        {
            return true;
        }

    }
}