AxibugEmuOnline/Core/VirtualNes.Core/Mapper/Mapper076.cs

//////////////////////////////////////////////////////////////////////////
// Mapper076  Namcot 109 (女神転生)                                     //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using BYTE = System.Byte;


namespace VirtualNes.Core
{
    public class Mapper076 : Mapper
    {
        BYTE reg;
        public Mapper076(NES parent) : base(parent)
        {
        }

        public override void Reset()
        {
            SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);

            if (VROM_1K_SIZE >= 8)
            {
                SetVROM_8K_Bank(0);
            }
        }

        //void Mapper076::Write(WORD addr, BYTE data)
        public override void Write(ushort addr, byte data)
        {
            switch (addr)
            {
                case 0x8000:
                    reg = data;
                    break;
                case 0x8001:
                    switch (reg & 0x07)
                    {
                        case 2:
                            SetVROM_2K_Bank(0, data);
                            break;
                        case 3:
                            SetVROM_2K_Bank(2, data);
                            break;
                        case 4:
                            SetVROM_2K_Bank(4, data);
                            break;
                        case 5:
                            SetVROM_2K_Bank(6, data);
                            break;
                        case 6:
                            SetPROM_8K_Bank(4, data);
                            break;
                        case 7:
                            SetPROM_8K_Bank(5, data);
                            break;
                    }
                    break;
            }
        }

        //void Mapper076::SaveState(LPBYTE p)
        public override void SaveState(byte[] p)
        {
            p[0] = reg;
        }

        //void Mapper076::LoadState(LPBYTE p)
        public override void LoadState(byte[] p)
        {
            reg = p[0];
        }


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