mirror of https://github.com/bsnes-emu/bsnes.git
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
struct Memory {
|
|
virtual inline auto size() const -> uint;
|
|
virtual auto read(uint24 addr, uint8 data = 0) -> uint8 = 0;
|
|
virtual auto write(uint24 addr, uint8 data) -> void = 0;
|
|
};
|
|
|
|
struct StaticRAM : Memory {
|
|
inline StaticRAM(uint size);
|
|
inline ~StaticRAM();
|
|
|
|
inline auto data() -> uint8*;
|
|
inline auto size() const -> uint;
|
|
|
|
inline auto read(uint24 addr, uint8 data = 0) -> uint8;
|
|
inline auto write(uint24 addr, uint8 data) -> void;
|
|
inline auto operator[](uint24 addr) -> uint8&;
|
|
inline auto operator[](uint24 addr) const -> const uint8&;
|
|
|
|
private:
|
|
uint8* data_ = nullptr;
|
|
uint size_ = 0;
|
|
};
|
|
|
|
struct MappedRAM : Memory {
|
|
inline auto reset() -> void;
|
|
inline auto map(uint8*, uint) -> void;
|
|
inline auto copy(const stream& memory) -> void;
|
|
inline auto read(const stream& memory) -> void;
|
|
|
|
inline auto write_protect(bool status) -> void;
|
|
inline auto data() -> uint8*;
|
|
inline auto size() const -> uint;
|
|
|
|
inline auto read(uint24 addr, uint8 data = 0) -> uint8;
|
|
inline auto write(uint24 addr, uint8 data) -> void;
|
|
inline auto operator[](uint24 addr) const -> const uint8&;
|
|
|
|
private:
|
|
uint8* data_ = nullptr;
|
|
uint size_ = 0;
|
|
bool write_protect_ = false;
|
|
};
|
|
|
|
struct Bus {
|
|
alwaysinline static auto mirror(uint addr, uint size) -> uint;
|
|
alwaysinline static auto reduce(uint addr, uint mask) -> uint;
|
|
|
|
~Bus();
|
|
|
|
alwaysinline auto read(uint24 addr, uint8 data) -> uint8;
|
|
alwaysinline auto write(uint24 addr, uint8 data) -> void;
|
|
|
|
auto reset() -> void;
|
|
auto map(
|
|
const function<uint8 (uint24, uint8)>& read,
|
|
const function<void (uint24, uint8)>& write,
|
|
const string& addr, uint size = 0, uint base = 0, uint mask = 0
|
|
) -> void;
|
|
auto unmap(const string& addr) -> void;
|
|
|
|
private:
|
|
uint8* lookup = nullptr;
|
|
uint32* target = nullptr;
|
|
|
|
function<auto (uint24, uint8) -> uint8> reader[256];
|
|
function<auto (uint24, uint8) -> void> writer[256];
|
|
uint24 counter[256];
|
|
};
|
|
|
|
extern Bus bus;
|