ComSquare::Memory::MemoryBus Class Reference

The memory bus is the component responsible of mapping addresses to components address and transmitting the data. More...

#include <MemoryBus.hpp>

Collaboration diagram for ComSquare::Memory::MemoryBus:

Public Member Functions
uint8_t	read (uint24_t addr)
	Read data at a global address. More...
void	write (uint24_t addr, uint8_t data)
	Write a data to a global address. More...
void	mapComponents (SNES &console)
	Map components to the address space using the currently loaded cartridge to set the right mapping mode. More...

Private Member Functions
std::shared_ptr< IMemory >	getAccessor (uint24_t addr)
	Helper function to get the components that is responsible of read/write at an address. More...
void	_mirrorComponents (SNES &console, int i)
	WRam, CPU, PPU & ALU registers are mirrored to all banks of Q1 & Q3. This function is used for the mirroring. More...

Private Attributes
std::vector< std::shared_ptr< IMemory > >	_memoryAccessors
	The list of components registered inside the bus. Every components that can read/write to a public address should be in this vector. More...
uint8_t	_openBus = 0
	The last value read via the memory bus. More...

Detailed Description

The memory bus is the component responsible of mapping addresses to components address and transmitting the data.

Member Function Documentation

_mirrorComponents()

void ComSquare::Memory::MemoryBus::_mirrorComponents ( SNES &  console, int  i  )

inlineprivate

WRam, CPU, PPU & ALU registers are mirrored to all banks of Q1 & Q3. This function is used for the mirroring.

Parameters

console	All the components.
i	Base address for the mirrors.

getAccessor()

std::shared_ptr< IMemory > ComSquare::Memory::MemoryBus::getAccessor ( uint24_t  addr )

private

Helper function to get the components that is responsible of read/write at an address.

Parameters

addr	The address you want to look for.

Returns

The components responsible for the address param or nullptr if none was found.

mapComponents()

void ComSquare::Memory::MemoryBus::mapComponents

(

SNES &

console

)

Map components to the address space using the currently loaded cartridge to set the right mapping mode.

Parameters

console

All the components.

read()

uint8_t ComSquare::Memory::MemoryBus::read

(

uint24_t

addr

)

Read data at a global address.

Parameters

addr	The address to read from.

Returns

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.

write()

void ComSquare::Memory::MemoryBus::write	(	uint24_t	addr,
		uint8_t	data
	)

Write a data to a global address.

Parameters

addr	The address to write to.
data	The data to write.

Member Data Documentation

_memoryAccessors

std::vector<std::shared_ptr<IMemory> > ComSquare::Memory::MemoryBus::_memoryAccessors

private

The list of components registered inside the bus. Every components that can read/write to a public address should be in this vector.

_openBus

uint8_t ComSquare::Memory::MemoryBus::_openBus = 0

private

The last value read via the memory bus.

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The documentation for this class was generated from the following files:

• sources/Memory/MemoryBus.hpp
• sources/Memory/MemoryBus.cpp