nes

package
v0.0.0-...-18eddd0 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Jan 22, 2022 License: BSD-3-Clause Imports: 7 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	InterruptNone = iota
	InterruptIrq
	InterruptReset
	InterruptNmi
)
View Source 
const (
	HiPassStrong = 225574
	HiPassWeak   = 57593
)
View Source 
const (
	ButtonA = iota
	ButtonB
	ButtonSelect
	ButtonStart
	ButtonUp
	ButtonDown
	ButtonLeft
	ButtonRight
)
View Source 
const (
	SaveState = iota
	LoadState
)
View Source 
const (
	BankUpper = iota
	BankLower

	Size1k  = 0x0400
	Size2k  = 0x0800
	Size4k  = 0x1000
	Size8k  = 0x2000
	Size16k = 0x4000
	Size32k = 0x8000
)
View Source 
const (
	RegisterPrgBankSelect = iota
	RegisterChrBank1Select
	RegisterChrBank2Select
	RegisterChrBank3Select
	RegisterChrBank4Select
	RegisterMirroringSelect
)
View Source 
const (
	ChrBank2k0000 = 0
	ChrBank2k0800 = 1
	ChrBank1k1000 = 2
	ChrBank1k1400 = 3
	ChrBank1k1800 = 4
	ChrBank1k1C00 = 5
	PrgBank8k8000 = 6
	PrgBank8kA000 = 7

	PrgBankSwapModeLow  = 0
	PrgBankSwapModeHigh = 1

	ChrA12InversionModeLow  = 0
	ChrA12InversionModeHigh = 1

	RegisterBankSelect = iota
	RegisterBankData
	RegisterMirroring
	RegisterPrgRamProtect
	RegisterIrqLatch
	RegisterIrqReload
	RegisterIrqDisable
	RegisterIrqEnable
)
View Source 
const (
	MirroringVertical = iota
	MirroringHorizontal
	MirroringSingleUpper
	MirroringSingleLower
)
View Source 
const (
	StatusSpriteOverflow = iota
	StatusSprite0Hit
	StatusVblankStarted
)

Variables

View Source 
var (
	SquareLookup = []int{
		0, 1, 0, 0, 0, 0, 0, 0,
		0, 1, 1, 0, 0, 0, 0, 0,
		0, 1, 1, 1, 1, 0, 0, 0,
		1, 0, 0, 1, 1, 1, 1, 1,
	}

	TriangleLookup = []int16{
		15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
		0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
	}

	NoiseLookup = []int{
		4, 8, 16, 32, 64, 96, 128, 160, 202,
		254, 380, 508, 762, 1016, 2034, 4068,
	}

	DmcFrequency = []int{
		428, 380, 340, 320, 286,
		254, 226, 214, 190, 160,
		142, 128, 106, 84, 72, 54,
	}

	LengthTable = []Word{
		10, 254, 20, 2, 40, 4, 80, 6,
		160, 8, 60, 10, 14, 12, 26, 14,
		12, 16, 24, 18, 48, 20, 96, 22,
		192, 24, 72, 26, 16, 28, 32, 30,
	}
)
View Source 
var (
	AudioEnabled = true

	GameName       string
	SaveStateFile  string
	BatteryRamFile string

	Handler EventHandler
)
View Source 
var (
	PaletteRgb = []uint32{
		0x666666, 0x002A88, 0x1412A7, 0x3B00A4, 0x5C007E,
		0x6E0040, 0x6C0600, 0x561D00, 0x333500, 0x0B4800,
		0x005200, 0x004F08, 0x00404D, 0x000000, 0x000000,
		0x000000, 0xADADAD, 0x155FD9, 0x4240FF, 0x7527FE,
		0xA01ACC, 0xB71E7B, 0xB53120, 0x994E00, 0x6B6D00,
		0x388700, 0x0C9300, 0x008F32, 0x007C8D, 0x000000,
		0x000000, 0x000000, 0xFFFEFF, 0x64B0FF, 0x9290FF,
		0xC676FF, 0xF36AFF, 0xFE6ECC, 0xFE8170, 0xEA9E22,
		0xBCBE00, 0x88D800, 0x5CE430, 0x45E082, 0x48CDDE,
		0x4F4F4F, 0x000000, 0x000000, 0xFFFEFF, 0xC0DFFF,
		0xD3D2FF, 0xE8C8FF, 0xFBC2FF, 0xFEC4EA, 0xFECCC5,
		0xF7D8A5, 0xE4E594, 0xCFEF96, 0xBDF4AB, 0xB3F3CC,
		0xB5EBF2, 0xB8B8B8, 0x000000, 0x000000,
	}
)

Functions

func Disassemble 

func Disassemble(opcode Word, cpu *Cpu, p uint16)

func Init 

func Init(contents []byte, audioBuf func(int16), getter GetButtonFunc) (chan []uint32, error)

func LoadGameState 

func LoadGameState()

func Pause 

func Pause()

func RunSystem 

func RunSystem()

Main system runloop. This should be run on it's own goroutine

func SaveGameState 

func SaveGameState()

func StepFrame 

func StepFrame()

func TogglePause 

func TogglePause()

Types

type Anrom 

type Anrom struct {
	RomBanks  [][]Word
	VromBanks [][]Word

	PrgBankCount int
	ChrRomCount  int
	Battery      bool
	Data         []byte

	PrgUpperBank int
	PrgLowerBank int
}

func (*Anrom) BatteryBacked 

func (m *Anrom) BatteryBacked() bool

func (*Anrom) Read 

func (m *Anrom) Read(a int) Word

func (*Anrom) ReadTile 

func (m *Anrom) ReadTile(a int) []Word

func (*Anrom) ReadVram 

func (m *Anrom) ReadVram(a int) Word

func (*Anrom) Write 

func (m *Anrom) Write(v Word, a int)

func (*Anrom) WriteVram 

func (m *Anrom) WriteVram(v Word, a int)

type Apu 

type Apu struct {
	Square1 Square
	Square2 Square
	Triangle
	Noise
	Dmc
	IrqEnabled   bool
	IrqActive    bool
	HipassStrong int64
	HipassWeak   int64

	FrameCounter  int
	FrameTick     int
	LastFrameTick int

	PulseOut []float64
	TndOut   [203]float64

	Sample int16
	Buffer func(int16)
}

func (*Apu) ComputeSample 

func (a *Apu) ComputeSample() int16

func (*Apu) FrameSequencerStep 

func (a *Apu) FrameSequencerStep()

func (*Apu) Init 

func (a *Apu) Init(buffer func(int16))

func (*Apu) PushSample 

func (a *Apu) PushSample()

func (*Apu) ReadStatus 

func (a *Apu) ReadStatus() Word

$4015 (r)

func (*Apu) RegRead 

func (a *Apu) RegRead(addr int) (Word, error)

func (*Apu) RegWrite 

func (a *Apu) RegWrite(v Word, addr int)

func (*Apu) RunHipassStrong 

func (a *Apu) RunHipassStrong(s int16) int16

func (*Apu) RunHipassWeak 

func (a *Apu) RunHipassWeak(s int16) int16

func (*Apu) Step 

func (a *Apu) Step()

func (*Apu) WriteControlFlags1 

func (a *Apu) WriteControlFlags1(v Word)

$4015 (w)

func (*Apu) WriteControlFlags2 

func (a *Apu) WriteControlFlags2(v Word)

$4017

func (*Apu) WriteDmcDirectLoad 

func (a *Apu) WriteDmcDirectLoad(v Word)

$4011

func (*Apu) WriteDmcFlags 

func (a *Apu) WriteDmcFlags(v Word)

$4010

func (*Apu) WriteDmcSampleAddress 

func (a *Apu) WriteDmcSampleAddress(v Word)

$4012

func (*Apu) WriteDmcSampleLength 

func (a *Apu) WriteDmcSampleLength(v Word)

$4013

func (*Apu) WriteNoiseBase 

func (a *Apu) WriteNoiseBase(v Word)

$400C

func (*Apu) WriteNoiseLength 

func (a *Apu) WriteNoiseLength(v Word)

$400F

func (*Apu) WriteNoisePeriod 

func (a *Apu) WriteNoisePeriod(v Word)

$400E

func (*Apu) WriteSquare1Control 

func (a *Apu) WriteSquare1Control(v Word)

$4000

func (*Apu) WriteSquare1High 

func (a *Apu) WriteSquare1High(v Word)

$4003

func (*Apu) WriteSquare1Low 

func (a *Apu) WriteSquare1Low(v Word)

$4002

func (*Apu) WriteSquare1Sweeps 

func (a *Apu) WriteSquare1Sweeps(v Word)

$4001

func (*Apu) WriteSquare2Control 

func (a *Apu) WriteSquare2Control(v Word)

$4004

func (*Apu) WriteSquare2High 

func (a *Apu) WriteSquare2High(v Word)

$4007

func (*Apu) WriteSquare2Low 

func (a *Apu) WriteSquare2Low(v Word)

$4006

func (*Apu) WriteSquare2Sweeps 

func (a *Apu) WriteSquare2Sweeps(v Word)

$4005

func (*Apu) WriteTriangleControl 

func (a *Apu) WriteTriangleControl(v Word)

$4008

func (*Apu) WriteTriangleHigh 

func (a *Apu) WriteTriangleHigh(v Word)

$400B

func (*Apu) WriteTriangleLow 

func (a *Apu) WriteTriangleLow(v Word)

$400A

type Cnrom 

type Cnrom struct {
	RomBanks  [][]Word
	VromBanks [][]Word

	PrgBankCount int
	ChrRomCount  int
	Battery      bool
	Data         []byte

	ActiveBank int
}

func (*Cnrom) BatteryBacked 

func (m *Cnrom) BatteryBacked() bool

func (*Cnrom) Read 

func (m *Cnrom) Read(a int) Word

func (*Cnrom) ReadTile 

func (m *Cnrom) ReadTile(a int) []Word

func (*Cnrom) ReadVram 

func (m *Cnrom) ReadVram(a int) Word

func (*Cnrom) Write 

func (m *Cnrom) Write(v Word, a int)

func (*Cnrom) WriteVram 

func (m *Cnrom) WriteVram(v Word, a int)

type Controller 

type Controller struct {
	ButtonState [16]Word
	StrobeState int
	LastWrite   Word
	LastYAxis   [2]int
	LastXAxis   [2]int
	// contains filtered or unexported fields
}

func NewController 

func NewController(getter GetButtonFunc) *Controller

func (*Controller) KeyDown 

func (c *Controller) KeyDown(e interface{}, offset int)

func (*Controller) KeyUp 

func (c *Controller) KeyUp(e interface{}, offset int)

func (*Controller) Read 

func (c *Controller) Read() (r Word)

func (*Controller) SetButtonState 

func (c *Controller) SetButtonState(button int, v Word, offset int)

func (*Controller) Write 

func (c *Controller) Write(v Word)

type Cpu 

type Cpu struct {
	X            Word
	Y            Word
	A            Word
	P            Word
	CycleCount   int
	StackPointer Word
	Opcode       Word
	Verbose      bool
	Accurate     bool
	InstrOpcodes [0xFF]func()

	ProgramCounter uint16

	InterruptRequested int
	CyclesToWait       int
	Timestamp          int
}

func (*Cpu) Adc 

func (c *Cpu) Adc(location uint16)

func (*Cpu) And 

func (c *Cpu) And(location uint16)

func (*Cpu) Asl 

func (c *Cpu) Asl(location uint16)

func (*Cpu) AslAcc 

func (c *Cpu) AslAcc()

func (*Cpu) Bcc 

func (c *Cpu) Bcc()

func (*Cpu) Bcs 

func (c *Cpu) Bcs()

func (*Cpu) Beq 

func (c *Cpu) Beq()

func (*Cpu) Bit 

func (c *Cpu) Bit(location uint16)

func (*Cpu) Bmi 

func (c *Cpu) Bmi()

func (*Cpu) Bne 

func (c *Cpu) Bne()

func (*Cpu) Bpl 

func (c *Cpu) Bpl()

func (*Cpu) Brk 

func (c *Cpu) Brk()

func (*Cpu) Bvc 

func (c *Cpu) Bvc()

func (*Cpu) Bvs 

func (c *Cpu) Bvs()

func (*Cpu) Clc 

func (c *Cpu) Clc()

func (*Cpu) Cld 

func (c *Cpu) Cld()

func (*Cpu) Cli 

func (c *Cpu) Cli()

func (*Cpu) Clv 

func (c *Cpu) Clv()

func (*Cpu) Cmp 

func (c *Cpu) Cmp(location uint16)

func (*Cpu) Compare 

func (c *Cpu) Compare(register Word, value Word)

func (*Cpu) Cpx 

func (c *Cpu) Cpx(location uint16)

func (*Cpu) Cpy 

func (c *Cpu) Cpy(location uint16)

func (*Cpu) Dec 

func (c *Cpu) Dec(location uint16)

func (*Cpu) Dex 

func (c *Cpu) Dex()

func (*Cpu) Dey 

func (c *Cpu) Dey()

func (*Cpu) Eor 

func (c *Cpu) Eor(location uint16)

func (*Cpu) Inc 

func (c *Cpu) Inc(location uint16)

func (*Cpu) Init 

func (c *Cpu) Init()

func (*Cpu) InstrInit 

func (c *Cpu) InstrInit()

func (*Cpu) Inx 

func (c *Cpu) Inx()

func (*Cpu) Iny 

func (c *Cpu) Iny()

func (*Cpu) Jmp 

func (c *Cpu) Jmp(location uint16)

func (*Cpu) Jsr 

func (c *Cpu) Jsr(location uint16)

func (*Cpu) Lda 

func (c *Cpu) Lda(location uint16)

func (*Cpu) Ldx 

func (c *Cpu) Ldx(location uint16)

func (*Cpu) Ldy 

func (c *Cpu) Ldy(location uint16)

func (*Cpu) Lsr 

func (c *Cpu) Lsr(location uint16)

func (*Cpu) LsrAcc 

func (c *Cpu) LsrAcc()

func (*Cpu) Ora 

func (c *Cpu) Ora(location uint16)

func (*Cpu) PerformIrq 

func (c *Cpu) PerformIrq()

func (*Cpu) PerformNmi 

func (c *Cpu) PerformNmi()

func (*Cpu) PerformReset 

func (c *Cpu) PerformReset()

func (*Cpu) Pha 

func (c *Cpu) Pha()

func (*Cpu) Php 

func (c *Cpu) Php()

func (*Cpu) Pla 

func (c *Cpu) Pla()

func (*Cpu) Plp 

func (c *Cpu) Plp()

func (*Cpu) RequestInterrupt 

func (c *Cpu) RequestInterrupt(i int)

func (*Cpu) Reset 

func (c *Cpu) Reset()

func (*Cpu) Rol 

func (c *Cpu) Rol(location uint16)

func (*Cpu) RolAcc 

func (c *Cpu) RolAcc()

func (*Cpu) Ror 

func (c *Cpu) Ror(location uint16)

func (*Cpu) RorAcc 

func (c *Cpu) RorAcc()

func (*Cpu) Rti 

func (c *Cpu) Rti()

func (*Cpu) Rts 

func (c *Cpu) Rts()

func (*Cpu) Sbc 

func (c *Cpu) Sbc(location uint16)

func (*Cpu) Sec 

func (c *Cpu) Sec()

func (*Cpu) Sed 

func (c *Cpu) Sed()

func (*Cpu) Sei 

func (c *Cpu) Sei()

func (*Cpu) SetBranchCycleCount 

func (c *Cpu) SetBranchCycleCount(a uint16)

func (*Cpu) SetResetVector 

func (c *Cpu) SetResetVector()

func (*Cpu) Sta 

func (c *Cpu) Sta(location uint16)

func (*Cpu) Step 

func (c *Cpu) Step() int

func (*Cpu) Stx 

func (c *Cpu) Stx(location uint16)

func (*Cpu) Sty 

func (c *Cpu) Sty(location uint16)

func (*Cpu) Tax 

func (c *Cpu) Tax()

func (*Cpu) Tay 

func (c *Cpu) Tay()

func (*Cpu) Tsx 

func (c *Cpu) Tsx()

func (*Cpu) Txa 

func (c *Cpu) Txa()

func (*Cpu) Txs 

func (c *Cpu) Txs()

func (*Cpu) Tya 

func (c *Cpu) Tya()

type Dmc 

type Dmc struct {
	Enabled        bool
	IrqEnabled     bool
	LoopEnabled    bool
	RateIndex      int
	RateCounter    int
	DirectLoad     int
	DirectCounter  int
	Data           Word
	Sample         int16
	SampleAddress  int
	CurrentAddress uint16
	SampleLength   int
	SampleCounter  int
	ShiftCounter   int
	Frequency      int
	HasSample      bool
}

func (*Dmc) Clock 

func (d *Dmc) Clock()

func (*Dmc) FillSample 

func (d *Dmc) FillSample()

type Envelope 

type Envelope struct {
	Volume       Word
	Counter      Word
	DecayRate    Word
	DecayCounter Word
	DecayEnabled bool
	LoopEnabled  bool
	Disabled     bool
	Reset        bool
}

func (*Envelope) ClockDecay 

func (e *Envelope) ClockDecay()

type EventHandler 

type EventHandler interface {
	Handle(event string)
}

type Flags 

type Flags struct {
	BaseNametableAddress     Word
	VramAddressInc           Word
	SpritePatternAddress     Word
	BackgroundPatternAddress Word
	SpriteSize               Word
	MasterSlaveSel           Word
	NmiOnVblank              Word
}

type GetButtonFunc 

type GetButtonFunc func(interface{}) int

type JsEventHandler 

type JsEventHandler struct {
	// contains filtered or unexported fields
}

func NewJsEventHandler 

func NewJsEventHandler(filename string) *JsEventHandler

func (*JsEventHandler) Handle 

func (handler *JsEventHandler) Handle(event string)

func (*JsEventHandler) ReloadFile 

func (handler *JsEventHandler) ReloadFile(filename string)

type Mapper 

type Mapper interface {
	Write(v Word, a int)
	Read(a int) Word
	WriteVram(v Word, a int)
	ReadVram(a int) Word
	ReadTile(a int) []Word
	BatteryBacked() bool
}

func LoadRom 

func LoadRom(rom []byte) (m Mapper, e error)

type Masks 

type Masks struct {
	Grayscale            bool
	ShowBackgroundOnLeft bool
	ShowSpritesOnLeft    bool
	ShowBackground       bool
	ShowSprites          bool
	IntensifyReds        bool
	IntensifyGreens      bool
	IntensifyBlues       bool
}

type Memory 

type Memory []Word
var (
	Ram  Memory
	Pads [2]*Controller
)

func NewMemory 

func NewMemory() Memory

func (Memory) Read 

func (m Memory) Read(a uint16) (Word, error)

func (Memory) ReadMirroredRam 

func (m Memory) ReadMirroredRam(a int) Word

func (Memory) Write 

func (m Memory) Write(address interface{}, val Word) error

func (Memory) WriteMirroredRam 

func (m Memory) WriteMirroredRam(v Word, a int)

type MemoryError 

type MemoryError struct {
	ErrorText string
}

func (MemoryError) Error 

func (e MemoryError) Error() string

type Mmc1 

type Mmc1 struct {
	RomBanks  [][]Word
	VromBanks [][]Word

	PrgBankCount int
	ChrRomCount  int
	Battery      bool
	Data         []byte

	Buffer        int
	BufferCounter uint
	PrgLowerBank  int
	PrgUpperBank  int
	PrgSwapBank   int
	PrgBankSize   int
	ChrBankSize   int
	ChrLowerBank  int
	ChrUpperBank  int
	Mirroring     int
}

func NewMmc1 

func NewMmc1(r *Nrom) *Mmc1

func (*Mmc1) BatteryBacked 

func (m *Mmc1) BatteryBacked() bool

func (*Mmc1) Read 

func (m *Mmc1) Read(a int) Word

func (*Mmc1) ReadTile 

func (m *Mmc1) ReadTile(a int) []Word

func (*Mmc1) ReadVram 

func (m *Mmc1) ReadVram(a int) Word

func (*Mmc1) RegisterNumber 

func (m *Mmc1) RegisterNumber(a int) int

func (*Mmc1) SetRegister 

func (m *Mmc1) SetRegister(reg int, v int)

func (*Mmc1) Write 

func (m *Mmc1) Write(v Word, a int)

func (*Mmc1) WriteVram 

func (m *Mmc1) WriteVram(v Word, a int)

type Mmc2 

type Mmc2 struct {
	RomBanks  [][]Word
	VromBanks [][]Word

	PrgBankCount int
	ChrRomCount  int
	Battery      bool
	Data         []byte

	LatchLow  int
	LatchHigh int
	LatchFE0  int
	LatchFE1  int
	LatchFD0  int
	LatchFD1  int

	PrgUpperHighBank int
	PrgUpperLowBank  int
	PrgLowerHighBank int
	PrgLowerLowBank  int

	ChrHighBank int
	ChrLowBank  int
}

func NewMmc2 

func NewMmc2(r *Nrom) *Mmc2

func (*Mmc2) BatteryBacked 

func (m *Mmc2) BatteryBacked() bool

func (*Mmc2) ChrBankSelect 

func (m *Mmc2) ChrBankSelect(v Word, b int)

func (*Mmc2) LatchTrigger 

func (m *Mmc2) LatchTrigger(a int)

func (*Mmc2) Load 

func (m *Mmc2) Load()

func (*Mmc2) MirroringSelect 

func (m *Mmc2) MirroringSelect(v Word)

func (*Mmc2) PrgBankSelect 

func (m *Mmc2) PrgBankSelect(v Word)

func (*Mmc2) Read 

func (m *Mmc2) Read(a int) Word

func (*Mmc2) ReadTile 

func (m *Mmc2) ReadTile(a int) []Word

func (*Mmc2) ReadVram 

func (m *Mmc2) ReadVram(a int) Word

func (*Mmc2) RegisterNumber 

func (m *Mmc2) RegisterNumber(a int) int

func (*Mmc2) Write 

func (m *Mmc2) Write(v Word, a int)

func (*Mmc2) WriteVram 

func (m *Mmc2) WriteVram(v Word, a int)

type Mmc3 

type Mmc3 struct {
	RomBanks  []Word
	VromBanks []Word

	PrgBankCount int
	ChrRomCount  int
	Battery      bool
	Data         []byte

	BankSelection   int
	PrgBankMode     int
	ChrA12Inversion int
	AddressChanged  bool
	IrqEnabled      bool
	IrqLatchValue   Word
	IrqCounter      Word
	IrqReset        bool
	IrqResetVbl     bool

	PrgUpperHighBank int
	PrgUpperLowBank  int
	PrgLowerHighBank int
	PrgLowerLowBank  int

	Chr000Bank  int
	Chr400Bank  int
	Chr800Bank  int
	ChrC00Bank  int
	Chr1000Bank int
	Chr1400Bank int
	Chr1800Bank int
	Chr1C00Bank int

	RamProtectDest [16]int
}

func NewMmc3 

func NewMmc3(r *Nrom) *Mmc3

func (*Mmc3) BankData 

func (m *Mmc3) BankData(v int)

func (*Mmc3) BankSelect 

func (m *Mmc3) BankSelect(v int)

func (*Mmc3) BatteryBacked 

func (m *Mmc3) BatteryBacked() bool

func (*Mmc3) Hook 

func (m *Mmc3) Hook()

func (*Mmc3) IrqDisable 

func (m *Mmc3) IrqDisable(v int)

func (*Mmc3) IrqEnable 

func (m *Mmc3) IrqEnable(v int)

func (*Mmc3) IrqLatch 

func (m *Mmc3) IrqLatch(v int)

func (*Mmc3) IrqReload 

func (m *Mmc3) IrqReload(v int)

func (*Mmc3) Load 

func (m *Mmc3) Load()

func (*Mmc3) RamProtection 

func (m *Mmc3) RamProtection(v int)

func (*Mmc3) Read 

func (m *Mmc3) Read(a int) Word

func (*Mmc3) ReadTile 

func (m *Mmc3) ReadTile(a int) []Word

func (*Mmc3) ReadVram 

func (m *Mmc3) ReadVram(a int) Word

func (*Mmc3) RegisterNumber 

func (m *Mmc3) RegisterNumber(a int) int

func (*Mmc3) SetMirroring 

func (m *Mmc3) SetMirroring(v int)

func (*Mmc3) Write 

func (m *Mmc3) Write(v Word, a int)

func (*Mmc3) WriteVram 

func (m *Mmc3) WriteVram(v Word, a int)

type Mmc5 

type Mmc5 struct {
	RomBanks  [][]Word
	VromBanks [][]Word

	ExtendedRam [0x400]Word

	PrgBankCount int
	ChrRomCount  int
	Battery      bool
	Data         []byte

	PrgSwitchMode   Word
	ChrSwitchMode   Word
	ExtendedRamMode Word
	ChrUpperBits    Word

	FillModeTile  Word
	FillModeColor Word

	SelectedPrgRamChip Word

	IrqLatch   int
	IrqCounter int
	IrqEnabled bool
	IrqStatus  Word

	PrgUpperHighBank int
	PrgUpperLowBank  int
	PrgLowerHighBank int
	PrgLowerLowBank  int

	Chr000Bank  int
	Chr400Bank  int
	Chr800Bank  int
	ChrC00Bank  int
	Chr1000Bank int
	Chr1400Bank int
	Chr1800Bank int
	Chr1C00Bank int

	SpriteSwapFunc [8]func()
	BgSwapFunc     [4]func()
}

func NewMmc5 

func NewMmc5(r *Nrom) *Mmc5

func (*Mmc5) BatteryBacked 

func (m *Mmc5) BatteryBacked() bool

func (*Mmc5) Load 

func (m *Mmc5) Load()

func (*Mmc5) NotifyScanline 

func (m *Mmc5) NotifyScanline()

func (*Mmc5) Read 

func (m *Mmc5) Read(a int) Word

func (*Mmc5) ReadIrqStatus 

func (m *Mmc5) ReadIrqStatus() Word

func (*Mmc5) ReadTile 

func (m *Mmc5) ReadTile(a int) []Word

func (*Mmc5) ReadVram 

func (m *Mmc5) ReadVram(a int) Word

func (*Mmc5) SetNametableMapping 

func (m *Mmc5) SetNametableMapping(v Word)

func (*Mmc5) SwapBgVram 

func (m *Mmc5) SwapBgVram()

func (*Mmc5) SwapSpriteVram 

func (m *Mmc5) SwapSpriteVram()

func (*Mmc5) Write 

func (m *Mmc5) Write(v Word, a int)

func (*Mmc5) WriteVram 

func (m *Mmc5) WriteVram(v Word, a int)

type Nametable 

type Nametable struct {
	Mirroring     int
	LogicalTables [4]*[0x400]Word
	Nametable0    [0x400]Word
	Nametable1    [0x400]Word
}

func (*Nametable) SetMirroring 

func (n *Nametable) SetMirroring(m int)

type Noise 

type Noise struct {
	LengthEnabled bool
	Enabled       bool
	BaseEnvelope  Word
	Mode          bool
	Timer         int
	TimerCount    int
	Length        Word
	Shift         int
	Sample        int16
	Envelope
}

func (*Noise) Clock 

func (n *Noise) Clock()

func (*Noise) UpdateSample 

func (n *Noise) UpdateSample(v int16)

type NoopEventHandler 

type NoopEventHandler struct {
}

func NewNoopEventHandler 

func NewNoopEventHandler() *NoopEventHandler

func (*NoopEventHandler) Handle 

func (handler *NoopEventHandler) Handle(event string)

type Nrom 

type Nrom struct {
	RomBanks  [][]Word
	VromBanks [][]Word

	PrgBankCount int
	ChrRomCount  int
	Battery      bool
	Data         []byte
}

Nrom

func (*Nrom) BatteryBacked 

func (m *Nrom) BatteryBacked() bool

func (*Nrom) Load 

func (m *Nrom) Load()

func (*Nrom) Read 

func (m *Nrom) Read(a int) Word

func (*Nrom) ReadTile 

func (m *Nrom) ReadTile(a int) []Word

func (*Nrom) ReadVram 

func (m *Nrom) ReadVram(a int) Word

func (*Nrom) Write 

func (m *Nrom) Write(v Word, a int)

func (*Nrom) WriteVram 

func (m *Nrom) WriteVram(v Word, a int)

type Pixel 

type Pixel struct {
	Color  uint32
	Value  int
	Pindex int
}

type Ppu 

type Ppu struct {
	Registers
	Flags
	Masks
	SpriteData
	Vram              [0xFFFF]Word
	SpriteRam         [0x100]Word
	Nametables        Nametable
	PaletteRam        [0x20]Word
	AttributeLocation [0x400]uint
	AttributeShift    [0x400]uint
	A12High           bool

	Palettebuffer []Pixel
	Framebuffer   []uint32

	Output      chan []uint32
	Cycle       int
	Scanline    int
	Timestamp   int
	VblankTime  int
	FrameCount  int
	FrameCycles int

	SuppressNmi        bool
	SuppressVbl        bool
	OverscanEnabled    bool
	SpriteLimitEnabled bool
}

func (*Ppu) Init 

func (p *Ppu) Init() chan []uint32

func (*Ppu) ReadData 

func (p *Ppu) ReadData() (r Word, err error)

$2007

func (*Ppu) ReadOamData 

func (p *Ppu) ReadOamData() (Word, error)

$2004

func (*Ppu) ReadStatus 

func (p *Ppu) ReadStatus() (s Word, e error)

$2002

func (*Ppu) RegRead 

func (p *Ppu) RegRead(a int) (Word, error)

func (*Ppu) RegWrite 

func (p *Ppu) RegWrite(v Word, a int)

func (*Ppu) Step 

func (p *Ppu) Step()

func (*Ppu) WriteAddress 

func (p *Ppu) WriteAddress(v Word)

$2006

func (*Ppu) WriteControl 

func (p *Ppu) WriteControl(v Word)

$2000

func (*Ppu) WriteData 

func (p *Ppu) WriteData(v Word)

$2007

func (*Ppu) WriteDma 

func (p *Ppu) WriteDma(v Word)

$4014

func (*Ppu) WriteMask 

func (p *Ppu) WriteMask(v Word)

$2001

func (*Ppu) WriteOamAddress 

func (p *Ppu) WriteOamAddress(v Word)

$2003

func (*Ppu) WriteOamData 

func (p *Ppu) WriteOamData(v Word)

$2004

func (*Ppu) WriteScroll 

func (p *Ppu) WriteScroll(v Word)

$2005

type Registers 

type Registers struct {
	Control          Word
	Mask             Word
	Status           Word
	VramDataBuffer   Word
	VramAddress      int
	VramLatch        int
	SpriteRamAddress int
	FineX            Word
	Data             Word
	WriteLatch       bool
	HighBitShift     uint16
	LowBitShift      uint16
}

type SpriteData 

type SpriteData struct {
	Tiles        [256]Word
	YCoordinates [256]Word
	Attributes   [256]Word
	XCoordinates [256]Word
}

type Square 

type Square struct {
	Enabled       bool
	LengthEnabled bool
	DutyCycle     Word
	DutyCount     Word
	Timer         int
	TimerCount    int
	Length        Word
	LastTick      int
	SweepEnabled  bool
	SweepPeriod   Word
	SweepCounter  Word
	SweepMode     Word
	Shift         Word
	SweepReload   bool
	Negative      bool
	Sample        int16
	Envelope
}

func (*Square) Clock 

func (s *Square) Clock()

func (*Square) ClockSweep 

func (s *Square) ClockSweep()

func (*Square) UpdateSample 

func (s *Square) UpdateSample(v int16)

func (*Square) WriteControl 

func (s *Square) WriteControl(v Word)

func (*Square) WriteHigh 

func (s *Square) WriteHigh(v Word)

func (*Square) WriteLow 

func (s *Square) WriteLow(v Word)

func (*Square) WriteSweeps 

func (s *Square) WriteSweeps(v Word)

type Triangle 

type Triangle struct {
	ReloadValue   Word
	Control       bool
	Enabled       bool
	LengthEnabled bool
	Halt          bool
	Timer         int
	TimerCount    int
	Length        Word
	Counter       int
	LookupCounter int
	Sample        int16
}

func (*Triangle) Clock 

func (t *Triangle) Clock()

func (*Triangle) ClockLinearCounter 

func (t *Triangle) ClockLinearCounter()

func (*Triangle) UpdateSample 

func (t *Triangle) UpdateSample(v int16)

type Unrom 

type Unrom struct {
	RomBanks  [][]Word
	VromBanks [][]Word

	PrgBankCount int
	ChrRomCount  int
	Battery      bool
	Data         []byte

	ActiveBank int
}

func (*Unrom) BatteryBacked 

func (m *Unrom) BatteryBacked() bool

func (*Unrom) Read 

func (m *Unrom) Read(a int) Word

func (*Unrom) ReadTile 

func (m *Unrom) ReadTile(a int) []Word

func (*Unrom) ReadVram 

func (m *Unrom) ReadVram(a int) Word

func (*Unrom) Write 

func (m *Unrom) Write(v Word, a int)

func (*Unrom) WriteVram 

func (m *Unrom) WriteVram(v Word, a int)

type Word 

type Word uint8

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