78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
struct Memory {
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virtual inline unsigned size() const;
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virtual uint8 read(unsigned addr) = 0;
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virtual void write(unsigned addr, uint8 data) = 0;
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};
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struct StaticRAM : Memory {
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inline uint8* data();
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inline unsigned size() const;
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inline uint8 read(unsigned addr);
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inline void write(unsigned addr, uint8 n);
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inline uint8& operator[](unsigned addr);
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inline const uint8& operator[](unsigned addr) const;
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inline StaticRAM(unsigned size);
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inline ~StaticRAM();
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private:
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uint8 *data_;
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unsigned size_;
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};
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struct MappedRAM : Memory {
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inline void reset();
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inline void map(uint8*, unsigned);
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inline void copy(const uint8*, unsigned);
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inline void write_protect(bool status);
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inline uint8* data();
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inline unsigned size() const;
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inline uint8 read(unsigned addr);
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inline void write(unsigned addr, uint8 n);
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inline const uint8& operator[](unsigned addr) const;
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inline MappedRAM(const char* name = NULL);
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inline void setName(const char* name) { name_ = name; }
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private:
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uint8 *data_;
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unsigned size_;
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bool write_protect_;
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const char* name_;
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};
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struct Bus {
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unsigned mirror(unsigned addr, unsigned size);
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alwaysinline uint8 read(unsigned addr);
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alwaysinline void write(unsigned addr, uint8 data);
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uint8 *lookup;
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uint32 *target;
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unsigned idcount;
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function<uint8 (unsigned)> reader[256];
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function<void (unsigned, uint8)> writer[256];
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enum class MapMode : unsigned { Direct, Linear, Shadow };
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void map(
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MapMode mode,
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unsigned bank_lo, unsigned bank_hi,
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unsigned addr_lo, unsigned addr_hi,
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const function<uint8 (unsigned)> &read,
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const function<void (unsigned, uint8)> &write,
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unsigned base = 0, unsigned length = 0
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);
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void map_reset();
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void map_xml();
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Bus();
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~Bus();
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};
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extern Bus bus;
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