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struct Memory {
virtual inline unsigned size() const;
virtual uint8 read(unsigned addr) = 0;
virtual void write(unsigned addr, uint8 data) = 0;
};
struct StaticRAM : Memory {
inline uint8* data();
inline unsigned size() const;
inline uint8 read(unsigned addr);
inline void write(unsigned addr, uint8 n);
inline uint8& operator[](unsigned addr);
inline const uint8& operator[](unsigned addr) const;
inline StaticRAM(unsigned size);
inline ~StaticRAM();
private:
uint8* data_;
unsigned size_;
};
struct MappedRAM : Memory {
inline void reset();
inline void map(uint8*, unsigned);
inline void copy(const stream& memory);
inline void read(const stream& memory);
inline void write_protect(bool status);
inline uint8* data();
inline unsigned size() const;
inline uint8 read(unsigned addr);
inline void write(unsigned addr, uint8 n);
inline const uint8& operator[](unsigned addr) const;
inline MappedRAM();
private:
uint8* data_;
unsigned size_;
bool write_protect_;
};
struct Bus {
alwaysinline static unsigned mirror(unsigned addr, unsigned size);
alwaysinline static unsigned reduce(unsigned addr, unsigned mask);
alwaysinline uint8 read(unsigned addr);
alwaysinline void write(unsigned addr, uint8 data);
uint8* lookup;
uint32* target;
unsigned idcount;
function<uint8 (unsigned)> reader[256];
function<void (unsigned, uint8)> writer[256];
void map(
const function<uint8 (unsigned)>& reader,
const function<void (unsigned, uint8)>& writer,
unsigned banklo, unsigned bankhi,
unsigned addrlo, unsigned addrhi,
unsigned size = 0, unsigned base = 0, unsigned mask = 0
);
void map_reset();
void map_xml();
Bus();
~Bus();
};
extern Bus bus;
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