MOS656X Class Reference

Inheritance diagram for MOS656X:

Public Types
enum	model_t { MOS6567R56A = 0, MOS6567R8, MOS6569, MOS6572 }

Public Member Functions
void	chip (model_t model)
void	lightpen ()
void	reset ()
const char *	credits () const
uint_least16_t	getCyclesPerLine () const
uint_least16_t	getRasterLines () const
Public Member Functions inherited from component
virtual void	reset ()=0
virtual const char *	credits () const =0
virtual const char *	error () const =0

Protected Member Functions
	MOS656X (EventContext *context)
void	event ()
void	badLineStateChange ()
void	activateIRQFlag (int flag)
bool	readDEN () const
bool	evaluateIsBadLine () const
virtual void	interrupt (bool state)=0
virtual void	setBA (bool state)=0
uint8_t	read (uint_least8_t addr)
void	write (uint_least8_t addr, uint8_t data)
Protected Member Functions inherited from component
virtual uint8_t	read (uint_least8_t addr)=0
virtual void	write (uint_least8_t addr, uint8_t data)=0

Protected Attributes
event_clock_t	m_rasterClk
EventContext &	event_context
uint_least16_t	cyclesPerLine
uint_least16_t	maxRasters
uint_least16_t	raster_irq
uint_least16_t	lineCycle
uint_least16_t	rasterY
uint_least16_t	yscroll
bool	areBadLinesEnabled
bool	isBadLine
bool	vblanking
bool	lp_triggered
uint8_t	irqFlags
uint8_t	irqMask
uint8_t	lpx
uint8_t	lpy
uint8_t	regs [0x40]
EventCallback< MOS656X >	badLineStateChangeEvent
uint8_t &	sprite_enable
uint8_t &	sprite_y_expansion
uint8_t	sprite_dma
uint8_t	sprite_expand_y
uint8_t	sprite_mc_base [8]

Static Protected Attributes
static const int	FIRST_DMA_LINE = 0x30
static const int	LAST_DMA_LINE = 0xf7

Additional Inherited Members
Private Member Functions inherited from Event
	Event (const char *const name)
virtual void	event ()=0

Member Function Documentation

void MOS656X::activateIRQFlag ( int  flag )

inlineprotected

Set an IRQ flag and trigger an IRQ if the corresponding IRQ mask is set. The IRQ only gets activated, i.e. flag 0x80 gets set, if it was not active before.

void MOS656X::badLineStateChange ( )

inlineprotected

AEC state was updated.

uint8_t MOS656X::read ( uint_least8_t  addr )

protected

Read VIC register.

Parameters

addr	Register to read.

bool MOS656X::readDEN ( ) const

inlineprotected

Read the DEN flag which tells whether the display is enabled

Returns

true if DEN is set, otherwise false

void MOS656X::write ( uint_least8_t  addr, uint8_t  data  )

protected

Write to VIC register.

Parameters

addr	Register to write to.
data	Data byte to write.

Member Data Documentation

bool MOS656X::areBadLinesEnabled

protected

are bad lines enabled for this frame?

uint_least16_t MOS656X::cyclesPerLine

protected

Number of cycles per line.

EventContext& MOS656X::event_context

protected

CPU's event context.

const int MOS656X::FIRST_DMA_LINE = 0x30

staticprotected

First line when we check for bad lines

uint8_t MOS656X::irqFlags

protected

internal IRQ flags

uint8_t MOS656X::irqMask

protected

masks for the IRQ flags

bool MOS656X::isBadLine

protected

is the current line a bad line

const int MOS656X::LAST_DMA_LINE = 0xf7

staticprotected

Last line when we check for bad lines

uint_least16_t MOS656X::lineCycle

protected

Current visible line

bool MOS656X::lp_triggered

protected

Has light pen IRQ been triggered in this frame already?

uint8_t MOS656X::lpx

protected

Light pen coordinates

uint_least16_t MOS656X::rasterY

protected

current raster line

uint8_t MOS656X::regs[0x40]

protected

memory for chip registers

uint8_t MOS656X::sprite_dma

protected

the 8 sprites data

uint8_t& MOS656X::sprite_enable

protected

the 8 sprites data

uint8_t MOS656X::sprite_expand_y

protected

the 8 sprites data

uint8_t MOS656X::sprite_mc_base[8]

protected

the 8 sprites data

uint8_t & MOS656X::sprite_y_expansion

protected

the 8 sprites data

bool MOS656X::vblanking

protected

Set when new frame starts.

uint_least16_t MOS656X::yscroll

protected

vertical scrolling value

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

• mos656x.h
• mos656x.cpp