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Implementing a rectangle memory accesor for the Cartridge (for the LoRom)

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AnonymusRaccoon
2020-01-29 18:03:29 +01:00
parent 589252b34e
commit 6429e9a284
17 changed files with 234 additions and 74 deletions
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sources/Memory/MemoryBus.hpp
+39 -28
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@@ -12,34 +12,45 @@
namespace ComSquare
{
//! @brief The memory bus is the component responsible of mapping addresses to components address and transmitting the data.
class MemoryBus {
private:
//! @brief The list of components registered inside the bus. Every components that can read/write to a public address should be in this vector.
std::vector<std::shared_ptr<IMemory>> _memoryAccessors;
//! @brief Helper function to get the components that is responsible of read/write at an address.
//! @param addr The address you want to look for.
//! @return The components responsible for the address param or nullptr if none was found.
std::shared_ptr<IMemory> getAccessor(uint24_t addr);
//! @brief The last value read via the memory bus.
uint8_t _openbus = 0;
//! @brief WRam, CPU, PPU & ALU registers are mirrored to all banks of Q1 & Q3. This function is used for the mirroring.
//! @param console All the components.
//! @param i Base address for the mirrors.
inline void _mirrorComponents(struct SNES &console, int i);
public:
//! @brief Read data at a global address.
//! @param addr The address to read from.
//! @return The value that the component returned for this address. If the address was mapped to ram, it simply returned the value. If the address was mapped to a register the component returned the register.
uint8_t read(uint24_t addr);
//! @brief Write a data to a global address.
//! @param addr The address to write to.
//! @param data The data to write.
void write(uint24_t addr, uint8_t data);
//! @brief Map components to the address space using the currently loaded cartridge to set the right mapping mode.
//! @param console All the components.
void mapComponents(struct SNES &console);
};
struct SNES;
namespace Memory
{
//! @brief The memory bus is the component responsible of mapping addresses to components address and transmitting the data.
class MemoryBus {
private:
//! @brief The list of components registered inside the bus. Every components that can read/write to a public address should be in this vector.
std::vector<std::shared_ptr<IMemory>> _memoryAccessors;
//! @brief Helper function to get the components that is responsible of read/write at an address.
//! @param addr The address you want to look for.
//! @return The components responsible for the address param or nullptr if none was found.
std::shared_ptr<IMemory> getAccessor(uint24_t addr);
//! @brief The last value read via the memory bus.
uint8_t _openbus = 0;
//! @brief WRam, CPU, PPU & ALU registers are mirrored to all banks of Q1 & Q3. This function is used for the mirroring.
//! @param console All the components.
//! @param i Base address for the mirrors.
inline void _mirrorComponents(SNES &console, int i);
public:
//! @brief Read data at a global address.
//! @param addr The address to read from.
//! @return The value that the component returned for this address. If the address was mapped to ram, it simply returned the value. If the address was mapped to a register the component returned the register.
uint8_t read(uint24_t addr);
//! @brief Write a data to a global address.
//! @param addr The address to write to.
//! @param data The data to write.
void write(uint24_t addr, uint8_t data);
//! @brief Map components to the address space using the currently loaded cartridge to set the right mapping mode.
//! @param console All the components.
void mapComponents(SNES &console);
};
}
}