This class keeps track of which bytes in the Ram have been written to. More...

#include <CheckedRam.hh>

Inheritance diagram for openmsx::CheckedRam:

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Collaboration diagram for openmsx::CheckedRam:

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Public Member Functions
	CheckedRam (const DeviceConfig &config, const std::string &name, static_string_view description, size_t size)

	~CheckedRam ()

byte	read (size_t addr)

byte	peek (size_t addr) const

void	write (size_t addr, byte value)

const byte *	getReadCacheLine (size_t addr) const

byte *	getWriteCacheLine (size_t addr)

byte *	getRWCacheLines (size_t addr, size_t size)

size_t	size () const

void	clear ()

Ram &	getUncheckedRam ()
	Give access to the unchecked Ram.

Detailed Description

This class keeps track of which bytes in the Ram have been written to.

It can be used for debugging MSX programs, because you can see if you are trying to read/execute uninitialized memory. Currently all normal RAM (MSXRam) and all normal memory mappers (MSXMemoryMappers) use CheckedRam. On the turboR, only the normal memory mapper runs via CheckedRam. The RAM accessed in DRAM mode or via the ROM mapper are unchecked! Note that there is basically no overhead for using CheckedRam over Ram, thanks to Wouter.

Definition at line 27 of file CheckedRam.hh.

Constructor & Destructor Documentation

◆ CheckedRam()

openmsx::CheckedRam::CheckedRam	(	const DeviceConfig &	config,
		const std::string &	name,
		static_string_view	description,
		size_t	size
	)

Definition at line 13 of file CheckedRam.cc.

References openmsx::Subject< T >::attach(), and openmsx::TclCallback::getSetting().

◆ ~CheckedRam()

openmsx::CheckedRam::~CheckedRam ( )

Definition at line 23 of file CheckedRam.cc.

References openmsx::Subject< T >::detach(), and openmsx::TclCallback::getSetting().

Member Function Documentation

◆ clear()

void openmsx::CheckedRam::clear ( )

Definition at line 85 of file CheckedRam.cc.

References openmsx::Ram::clear().

Referenced by openmsx::MSXMemoryMapperBase::powerUp().

◆ getReadCacheLine()

const byte * openmsx::CheckedRam::getReadCacheLine ( size_t addr ) const

Definition at line 39 of file CheckedRam.cc.

References openmsx::CacheLine::BITS.

Referenced by openmsx::ColecoSuperGameModule::getReadCacheLine(), and openmsx::MSXMemoryMapperBase::getReadCacheLine().

◆ getRWCacheLines()

byte * openmsx::CheckedRam::getRWCacheLines	(	size_t	addr,
		size_t	size
	)

Definition at line 51 of file CheckedRam.cc.

References openmsx::CacheLine::BITS, size(), and xrange().

Referenced by openmsx::MSXMemoryMapper::writeIO(), and openmsx::PanasonicRam::writeIO().

◆ getUncheckedRam()

Ram & openmsx::CheckedRam::getUncheckedRam ( )

inline

Give access to the unchecked Ram.

No problem to use it, but there will just be no checking done! Keep in mind that you should use this consistently, so that the initialized-administration will be always up to date!

Definition at line 51 of file CheckedRam.hh.

Referenced by openmsx::PanasonicRam::PanasonicRam(), openmsx::ColecoSuperGameModule::serialize(), and openmsx::MSXMemoryMapperBase::serialize().