//////////////////////////////////////////////////////////////////////////
// Mapper048  Taito TC190V                                              //
//////////////////////////////////////////////////////////////////////////
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 Mapper048 : Mapper
	{
		BYTE reg;
		BYTE irq_enable;
		BYTE irq_counter;
		public Mapper048(NES parent) : base(parent)
		{
		}

		public override void Reset()
		{
			reg = 0;
			irq_enable = 0;
			irq_counter = 0;

			SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
			SetVROM_8K_Bank(0);

			uint crc = nes.rom.GetPROM_CRC();
			//	if( crc == 0x547e6cc1 ) { // Flintstones - The Rescue of Dino & Hoppy(J)
			//		nes.SetRenderMethod( NES::POST_RENDER );
			//	}
		}

		//void Mapper048::Write(WORD addr, BYTE data)
		public override void Write(ushort addr, byte data)
		{
			switch (addr)
			{
				case 0x8000:
					if (reg == 0)
					{
						if ((data & 0x40) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
						else SetVRAM_Mirror(VRAM_VMIRROR);
					}
					SetPROM_8K_Bank(4, data);
					break;
				case 0x8001:
					SetPROM_8K_Bank(5, data);
					break;

				case 0x8002:
					SetVROM_2K_Bank(0, data);
					break;
				case 0x8003:
					SetVROM_2K_Bank(2, data);
					break;
				case 0xA000:
					SetVROM_1K_Bank(4, data);
					break;
				case 0xA001:
					SetVROM_1K_Bank(5, data);
					break;
				case 0xA002:
					SetVROM_1K_Bank(6, data);
					break;
				case 0xA003:
					SetVROM_1K_Bank(7, data);
					break;

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

				case 0xC001:
					irq_counter = data;
					irq_enable = 1;
					//			irq_enable = data & 0x01;
					//			nes.cpu.ClrIRQ( IRQ_MAPPER );
					break;

				case 0xC002:
					break;
				case 0xC003:
					break;

				case 0xE000:
					if ((data & 0x40) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
					else SetVRAM_Mirror(VRAM_VMIRROR);
					reg = 1;
					break;
			}
		}

		//void Mapper048::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 == 0xFF)
						{
							//					nes.cpu.IRQ_NotPending();
							//					nes.cpu.SetIRQ( IRQ_MAPPER );
							nes.cpu.SetIRQ(IRQ_TRIGGER2);
						}
						irq_counter++;
					}
				}
			}
		}

		//void Mapper048::SaveState(LPBYTE p)
		public override void SaveState(byte[] p)
		{
			p[0] = reg;
			p[1] = irq_enable;
			p[2] = irq_counter;
		}

		//void Mapper048::LoadState(LPBYTE p)
		public override void LoadState(byte[] p)
		{
			reg = p[0];
			irq_enable = p[1];
			irq_counter = p[2];
		}


		public override bool IsStateSave()
		{
			return true;
		}

	}
}