wisdom meme

class MbcWisdomTree : public Mbc {
public:
    explicit MbcWisdomTree(MemPtrs &memptrs)
    : memptrs_(memptrs)
    , rombank_(0)
    {
    }

    virtual unsigned char curRomBank() const {
        return rombank_;
    }

    virtual void romWrite(unsigned const p, unsigned const data, unsigned long const /*cc*/) {
        rombank_ = (p & 0xFF) << 1;
        setRombank();
    }

    virtual void saveState(SaveState::Mem &ss) const {
        ss.rombank = rombank_;
    }

    virtual void loadState(SaveState::Mem const &ss) {
        rombank_ = ss.rombank;
        setRombank();
    }

private:
    MemPtrs &memptrs_;
    unsigned char rombank_;

    void setRombank() const {
        memptrs_.setRombank0(rombank_ & (rombanks(memptrs_) - 1));
        memptrs_.setRombank((rombank_ + 1) & (rombanks(memptrs_) - 1));
    }

    virtual bool isAddressWithinAreaRombankCanBeMappedTo(unsigned addr, unsigned bank) const {
        return (addr < 0x8000);
    }
};