//////////////////////////////////////////////////////////////////////////
// Mapper046  Rumble Station                                            //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using static VirtualNes.Core.CPU;
using INT = System.Int32;
using BYTE = System.Byte;
using Codice.CM.Client.Differences;

namespace VirtualNes.Core
{
	public class Mapper046 : Mapper
	{
		int[] reg = new int[4];
		public Mapper046(NES parent) : base(parent)
		{
		}


		public override void Reset()
		{
			reg[0] = 0;
			reg[1] = 0;
			reg[2] = 0;
			reg[3] = 0;

			SetBank();
			SetVRAM_Mirror(VRAM_VMIRROR);
		}

		//void Mapper046::WriteLow(WORD addr, BYTE data)
		public override void WriteLow(ushort addr, byte data)
		{
			reg[0] = data & 0x0F;
			reg[1] = (data & 0xF0) >> 4;
			SetBank();
		}

		//void Mapper046::Write(WORD addr, BYTE data)
		public override void Write(ushort addr, byte data)
		{
			reg[2] = data & 0x01;
			reg[3] = (data & 0x70) >> 4;
			SetBank();
		}

		void SetBank()
		{
			SetPROM_8K_Bank(4, reg[0] * 8 + reg[2] * 4 + 0);
			SetPROM_8K_Bank(5, reg[0] * 8 + reg[2] * 4 + 1);
			SetPROM_8K_Bank(6, reg[0] * 8 + reg[2] * 4 + 2);
			SetPROM_8K_Bank(7, reg[0] * 8 + reg[2] * 4 + 3);

			SetVROM_1K_Bank(0, reg[1] * 64 + reg[3] * 8 + 0);
			SetVROM_1K_Bank(1, reg[1] * 64 + reg[3] * 8 + 1);
			SetVROM_1K_Bank(2, reg[1] * 64 + reg[3] * 8 + 2);
			SetVROM_1K_Bank(3, reg[1] * 64 + reg[3] * 8 + 3);
			SetVROM_1K_Bank(4, reg[1] * 64 + reg[3] * 8 + 4);
			SetVROM_1K_Bank(5, reg[1] * 64 + reg[3] * 8 + 5);
			SetVROM_1K_Bank(6, reg[1] * 64 + reg[3] * 8 + 6);
			SetVROM_1K_Bank(7, reg[1] * 64 + reg[3] * 8 + 7);
		}

		//void Mapper046::SaveState(LPBYTE p)
		public override void SaveState(byte[] p)
		{
			p[0] = (byte)reg[0];
			p[1] = (byte)reg[1];
			p[2] = (byte)reg[2];
			p[3] = (byte)reg[3];
		}

		//void Mapper046::LoadState(LPBYTE p)
		public override void LoadState(byte[] p)
		{
			reg[0] = p[0];
			reg[1] = p[1];
			reg[2] = p[2];
			reg[3] = p[3];
		}


		public override bool IsStateSave()
		{
			return true;
		}
	}
}