AxibugEmuOnline/Core/VirtualNes.Core/Mapper/Mapper071.cs

//////////////////////////////////////////////////////////////////////////
// Mapper071  Camerica                                                  //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;


namespace VirtualNes.Core
{
    public class Mapper071 : Mapper
    {
        public Mapper071(NES parent) : base(parent)
        {
        }

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

        //void Mapper071::WriteLow(WORD addr, BYTE data)
        public override void WriteLow(ushort addr, byte data)
        {
            if ((addr & 0xE000) == 0x6000)
            {
                SetPROM_16K_Bank(4, data);
            }
        }

        //void Mapper071::Write(WORD addr, BYTE data)
        public override void Write(ushort addr, byte data)
        {
            switch (addr & 0xF000)
            {
                case 0x9000:
                    if ((data & 0x10) != 0) SetVRAM_Mirror(VRAM_MIRROR4H);
                    else SetVRAM_Mirror(VRAM_MIRROR4L);
                    break;

                case 0xC000:
                case 0xD000:
                case 0xE000:
                case 0xF000:
                    SetPROM_16K_Bank(4, data);
                    break;
            }
        }


    }
}