openMSX
Public Member Functions | List of all members
openmsx::ADVram Class Referencefinal

Implementation of direct cpu access to VRAM. More...

#include <ADVram.hh>

Inheritance diagram for openmsx::ADVram:
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Collaboration diagram for openmsx::ADVram:
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Public Member Functions

 ADVram (const DeviceConfig &config)
 
void reset (EmuTime::param time) override
 This method is called on reset. More...
 
byte readIO (word port, EmuTime::param time) override
 Read a byte from an IO port, change mode bits. More...
 
void writeIO (word port, byte value, EmuTime::param time) override
 Write a byte to a given IO port, set mapper register. More...
 
byte readMem (word address, EmuTime::param time) override
 Read a byte from a location in the video ram at a certain time. More...
 
void writeMem (word address, byte value, EmuTime::param time) override
 Write a given byte at a certain time to a given location in the video ram. More...
 
template<typename Archive >
void serialize (Archive &ar, unsigned version)
 
- Public Member Functions inherited from openmsx::MSXDevice
 MSXDevice (const MSXDevice &)=delete
 
MSXDeviceoperator= (const MSXDevice &)=delete
 
virtual ~MSXDevice ()=0
 
const HardwareConfiggetHardwareConfig () const
 Returns the hardwareconfig this device belongs to. More...
 
void testRemove (Devices alreadyRemoved) const
 Checks whether this device can be removed (no other device has a reference to it). More...
 
virtual byte readIRQVector ()
 Gets IRQ vector used in IM2. More...
 
virtual void powerDown (EmuTime::param time)
 This method is called when MSX is powered down. More...
 
virtual void powerUp (EmuTime::param time)
 This method is called when MSX is powered up. More...
 
virtual std::string getName () const
 Returns a human-readable name for this device. More...
 
virtual void getNameList (TclObject &result) const
 Returns list of name(s) of this device. More...
 
void getDeviceInfo (TclObject &result) const
 Get device info. More...
 
void getVisibleMemRegion (unsigned &base, unsigned &size) const
 Returns the range where this device is visible in memory. More...
 
virtual byte peekIO (word port, EmuTime::param time) const
 Read a byte from a given IO port. More...
 
virtual const bytegetReadCacheLine (word start) const
 Test that the memory in the interval [start, start + CacheLine::SIZE) is cacheable for reading. More...
 
virtual bytegetWriteCacheLine (word start) const
 Test that the memory in the interval [start, start + CacheLine::SIZE) is cacheable for writing. More...
 
virtual byte peekMem (word address, EmuTime::param time) const
 Read a byte from a given memory location. More...
 
virtual void globalWrite (word address, byte value, EmuTime::param time)
 Global writes. More...
 
virtual void globalRead (word address, EmuTime::param time)
 Global reads. More...
 
void invalidateDeviceRWCache ()
 Calls MSXCPUInterface::invalidateXXCache() for the specific (part of) the slot that this device is located in. More...
 
void invalidateDeviceRCache ()
 
void invalidateDeviceWCache ()
 
void invalidateDeviceRWCache (unsigned start, unsigned size)
 
void invalidateDeviceRCache (unsigned start, unsigned size)
 
void invalidateDeviceWCache (unsigned start, unsigned size)
 
void fillDeviceRWCache (unsigned start, unsigned size, byte *rwData)
 Calls MSXCPUInterface::fillXXCache() for the specific (part of) the slot that this device is located in. More...
 
void fillDeviceRWCache (unsigned start, unsigned size, const byte *rData, byte *wData)
 
void fillDeviceRCache (unsigned start, unsigned size, const byte *rData)
 
void fillDeviceWCache (unsigned start, unsigned size, byte *wData)
 
MSXMotherBoardgetMotherBoard () const
 Get the mother board this device belongs to. More...
 
const XMLElementgetDeviceConfig () const
 Get the configuration section for this device. More...
 
const DeviceConfiggetDeviceConfig2 () const
 
const DevicesgetReferences () const
 Get the device references that are specified for this device. More...
 
EmuTime::param getCurrentTime () const
 
MSXCPUgetCPU () const
 
MSXCPUInterfacegetCPUInterface () const
 
SchedulergetScheduler () const
 
CliCommgetCliComm () const
 
ReactorgetReactor () const
 
CommandControllergetCommandController () const
 
PluggingControllergetPluggingController () const
 
LedStatusgetLedStatus () const
 
template<typename Archive >
void serialize (Archive &ar, unsigned version)
 

Additional Inherited Members

- Public Types inherited from openmsx::MSXDevice
using Devices = std::vector< MSXDevice * >
 
- Static Public Attributes inherited from openmsx::MSXDevice
static byte unmappedRead [0x10000]
 
static byte unmappedWrite [0x10000]
 
- Protected Member Functions inherited from openmsx::MSXDevice
 MSXDevice (const DeviceConfig &config, const std::string &name)
 Every MSXDevice has a config entry; this constructor gets some device properties from that config entry. More...
 
 MSXDevice (const DeviceConfig &config)
 
virtual unsigned getBaseSizeAlignment () const
 The 'base' and 'size' attribute values need to be at least aligned to CacheLine::SIZE. More...
 
virtual void getExtraDeviceInfo (TclObject &result) const
 

Detailed Description

Implementation of direct cpu access to VRAM.

ADVram (Accesso Direito à Vram is a rare hardware modification that allows the CPU to access the video ram in the same way as ordinary ram.

Definition at line 15 of file ADVram.hh.

Constructor & Destructor Documentation

◆ ADVram()

openmsx::ADVram::ADVram ( const DeviceConfig config)
explicit

Definition at line 10 of file ADVram.cc.

References reset().

Member Function Documentation

◆ readIO()

byte openmsx::ADVram::readIO ( word  port,
EmuTime::param  time 
)
overridevirtual

Read a byte from an IO port, change mode bits.

The planar bit and possibly the enable bit are set according to address lines that are normally ignored for IO reads. Returns 255.

Reimplemented from openmsx::MSXDevice.

Definition at line 45 of file ADVram.cc.

◆ readMem()

byte openmsx::ADVram::readMem ( word  address,
EmuTime::param  time 
)
overridevirtual

Read a byte from a location in the video ram at a certain time.

If the device is enabled then the value returned comes from the video ram, otherwise it returns 255.

Reimplemented from openmsx::MSXDevice.

Definition at line 72 of file ADVram.cc.

References openmsx::VDPVRAM::cpuRead().

◆ reset()

void openmsx::ADVram::reset ( EmuTime::param  time)
overridevirtual

This method is called on reset.

Reset the mapper register and the planar bit, if the device is configured with an enable bit then that bit is reset as well.

Reimplemented from openmsx::MSXDevice.

Definition at line 37 of file ADVram.cc.

Referenced by ADVram().

◆ serialize()

template<typename Archive >
void openmsx::ADVram::serialize ( Archive &  ar,
unsigned  version 
)

Definition at line 85 of file ADVram.cc.

◆ writeIO()

void openmsx::ADVram::writeIO ( word  port,
byte  value,
EmuTime::param  time 
)
overridevirtual

Write a byte to a given IO port, set mapper register.


Reimplemented from openmsx::MSXDevice.

Definition at line 57 of file ADVram.cc.

◆ writeMem()

void openmsx::ADVram::writeMem ( word  address,
byte  value,
EmuTime::param  time 
)
overridevirtual

Write a given byte at a certain time to a given location in the video ram.

If the device is enabled then the write is redirected to the video ram, if it is not, nothing happens.

Reimplemented from openmsx::MSXDevice.

Definition at line 77 of file ADVram.cc.

References openmsx::VDPVRAM::cpuWrite().


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