//////////////////////////////////////////////////////////////////////////
// Mapper175  15-in-1 (Kaiser)                                          //
//////////////////////////////////////////////////////////////////////////
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 Mapper175 : Mapper
	{
		BYTE reg_dat;
		public Mapper175(NES parent) : base(parent)
		{
		}

		public override void Reset()
		{
			SetPROM_16K_Bank(4, 0);
			SetPROM_16K_Bank(6, 0);
			reg_dat = 0;

			if (VROM_1K_SIZE != 0)
			{
				SetVROM_8K_Bank(0);
			}
		}

		//void Mapper175::Read(WORD addr, BYTE data)
		public override void Read(ushort addr, byte data)
		{
			if (addr == 0xFFFC)
			{
				SetPROM_16K_Bank(4, reg_dat & 0x0F);
				SetPROM_8K_Bank(6, (reg_dat & 0x0F) * 2);
			}
		}

		//void Mapper175::Write(WORD addr, BYTE data)
		public override void Write(ushort addr, byte data)
		{
			switch (addr)
			{
				case 0x8000:
					if ((data & 0x04) != 0)
					{
						SetVRAM_Mirror(VRAM_HMIRROR);
					}
					else
					{
						SetVRAM_Mirror(VRAM_VMIRROR);
					}
					break;
				case 0xA000:
					reg_dat = data;
					SetPROM_8K_Bank(7, (reg_dat & 0x0F) * 2 + 1);
					SetVROM_8K_Bank(reg_dat & 0x0F);
					break;
			}
		}

		public override bool IsStateSave()
		{
			return true;
		}

	}
}