AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper046.cs

//////////////////////////////////////////////////////////////////////////
// Mapper046  Rumble Station                                            //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;


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;
        }
    }
}