Manages VRAM contents and synchronises the various users of the VRAM. More...

#include <VDPVRAM.hh>

Collaboration diagram for openmsx::VDPVRAM:

Public Member Functions
	VDPVRAM (const VDPVRAM &)=delete

VDPVRAM &	operator= (const VDPVRAM &)=delete

	VDPVRAM (VDP &vdp, unsigned size, EmuTime::param time)

void	clear ()
	Initialize VRAM content to power-up state. More...

void	sync (EmuTime::param time)
	Update VRAM state to specified moment in time. More...

void	cmdWrite (unsigned address, byte value, EmuTime::param time)
	Write a byte from the command engine. More...

void	cpuWrite (unsigned address, byte value, EmuTime::param time)
	Write a byte to VRAM through the CPU interface. More...

byte	cpuRead (unsigned address, EmuTime::param time)
	Read a byte from VRAM though the CPU interface. More...

void	updateDisplayMode (DisplayMode mode, bool cmdBit, EmuTime::param time)
	Used by the VDP to signal display mode changes. More...

void	updateDisplayEnabled (bool enabled, EmuTime::param time)
	Used by the VDP to signal display enabled changes. More...

void	updateSpritesEnabled (bool enabled, EmuTime::param time)
	Used by the VDP to signal sprites enabled changes. More...

void	updateVRMode (bool mode, EmuTime::param time)
	Change between VR=0 and VR=1 mode. More...

void	setRenderer (Renderer *renderer, EmuTime::param time)

unsigned	getSize () const
	Returns the size of VRAM in bytes. More...

void	setSpriteChecker (SpriteChecker *newSpriteChecker)
	Necessary because of circular dependencies. More...

void	setCmdEngine (VDPCmdEngine *newCmdEngine)
	Necessary because of circular dependencies. More...

void	change4k8kMapping (bool mapping8k)
	TMS99x8 VRAM can be mapped in two ways. More...

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

Public Attributes
VRAMWindow	cmdReadWindow

VRAMWindow	cmdWriteWindow

VRAMWindow	nameTable

VRAMWindow	colorTable

VRAMWindow	patternTable

VRAMWindow	bitmapVisibleWindow

VRAMWindow	bitmapCacheWindow

VRAMWindow	spriteAttribTable

VRAMWindow	spritePatternTable

Detailed Description

Manages VRAM contents and synchronises the various users of the VRAM.

VDPVRAM does not apply planar remapping to addresses, this is the responsibility of the caller.

Definition at line 384 of file VDPVRAM.hh.

Constructor & Destructor Documentation

◆ VDPVRAM() [1/2]

openmsx::VDPVRAM::VDPVRAM ( const VDPVRAM & )

delete

◆ VDPVRAM() [2/2]

openmsx::VDPVRAM::VDPVRAM	(	VDP &	vdp,
		unsigned	size,
		EmuTime::param	time
	)

Definition at line 110 of file VDPVRAM.cc.

References bitmapCacheWindow, openmsx::VDP::getVRMode(), and openmsx::VRAMWindow::setMask().

Member Function Documentation

◆ change4k8kMapping()

void openmsx::VDPVRAM::change4k8kMapping ( bool mapping8k )

TMS99x8 VRAM can be mapped in two ways.

See implementation for more details.

Definition at line 241 of file VDPVRAM.cc.

◆ clear()

void openmsx::VDPVRAM::clear ( )

Initialize VRAM content to power-up state.

Definition at line 140 of file VDPVRAM.cc.

References openmsx::Ram::clear(), and openmsx::Ram::getSize().

◆ cmdWrite()

void openmsx::VDPVRAM::cmdWrite	(	unsigned	address,
		byte	value,
		EmuTime::param	time
	)

inline

Write a byte from the command engine.

Synchronisation with reads by the command engine is skipped. TODO: Replace by "cmdSync ; VRAMWindow::write". Note: "cmdSync", because it checks against read windows, unlike the other sync which checks against the cmd write window.

Definition at line 411 of file VDPVRAM.hh.

References openmsx::VDP::isInsideFrame(), and unlikely.

Referenced by openmsx::ImpOp::operator()(), openmsx::AndOp::operator()(), openmsx::OrOp::operator()(), openmsx::XorOp::operator()(), and openmsx::NotOp::operator()().