using static VirtualNes.MMU;
using static VirtualNes.Core.CPU;
using INT = System.Int32;
using BYTE = System.Byte;
using System;
using Codice.CM.Client.Differences;
using System.Runtime.ConstrainedExecution;

namespace VirtualNes.Core
{
    public class Mapper176 : Mapper
    {
        BYTE prg, chr;
        public Mapper176(NES parent) : base(parent)
        {
        }

        public override void Reset()
        {
            //prg = ~0;
            prg = unchecked((byte)(~0));
            chr = 0;
            Sync();
        }

        void Sync()
        {
            //setprg8r(0x10,0x6000,0);
            SetPROM_32K_Bank(prg >> 1);
            SetVROM_8K_Bank(chr);
        }

        //void Mapper176::WriteLow(WORD addr, BYTE data)
        public override void WriteLow(ushort addr, byte data)
        {
            switch (addr)
            {
                case 0x5ff1:
                    prg = data; Sync();
                    break;
                case 0x5ff2:
                    chr = data; Sync();
                    break;
                default:
                    break;
            }
            if (addr >= 0x6000)
            {
                CPU_MEM_BANK[addr >> 13][addr & 0x1FFF] = data;
            }
        }

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