chibigb

package
v1.2.5 Latest Latest
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 Go to latest Published: Sep 5, 2022 License: GPL-3.0 Imports: 3 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// must be power of two
	SAMPLES_PER_SECONDS = 44100
	CLOCKS_PER_SECONDS  = 4194304
	CLOCKS_PER_SAMPLE   = CLOCKS_PER_SECONDS / SAMPLES_PER_SECONDS
)
View Source 
const (
	APU_WAVE_FORM_SQUARE APUWaveType = 0
	APU_WAVE_FORM_WAVE               = 1
	APU_WAVE_FORM_NOISE              = 2
)
View Source 
const (
	CARTRIDGE_NO_MBC        CartridgeType = 0
	CARTRIDGE_MBC1                        = 1
	CARTRIDGE_MBC2                        = 2
	CARTRIDGE_MBC3                        = 3
	CARTRIDGE_MBC5                        = 4
	CARTRIDGE_MBC1_MULTI                  = 5
	CARTRIDGE_NOT_SUPPORTED               = 6
)
View Source 
const (
	KEY_A      GameBoyKeys = 4
	KEY_B                  = 5
	KEY_START              = 7
	KEY_SELECT             = 6
	KEY_RIGHT              = 0
	KEY_LEFT               = 1
	KEY_UP                 = 2
	KEY_DOWN               = 3
)
View Source 
const (
	CPUFLAG_NONE  = 0x00
	CPUFLAG_CARRY = 0x10
	CPUFLAG_HALF  = 0x20
	CPUFLAG_SUB   = 0x40
	CPUFLAG_ZERO  = 0x80
)
View Source 
const (
	INTERRUPT_NONE    CPUInterrupt = 0x00
	INTERRUPT_VBLANK               = 0x01
	INTERRUPT_LCDSTAT              = 0x02
	INTERRUPT_TIMER                = 0x04
	INTERRUPT_SERIAL               = 0x08
	INTERRUPT_JOYPAD               = 0x10
)
View Source 
const (
	GBC_PIXEL_RGB565 GameBoyColorPixelFormat = 0
	GBC_PIXEL_RGB555                         = 1
	GBC_PIXEL_BGR565                         = 2
	GBC_PIXEL_BGR555                         = 3
)
View Source 
const APU_RING_BUFFER_SIZE int = 16 * 512 * 4
View Source 
const GAMEBOY_HEIGHT = 144
View Source 
const GAMEBOY_WIDTH = 160
View Source 
const MBC1RAMBanksSize = 0x8000
View Source 
const MBC2RAMBanksSize = 0x8000
View Source 
const MBC3RAMBanksSize = 0x8000
View Source 
const MBC5RAMBanksSize = 0x20000

Variables

View Source 
var InitialValuesForFFXX = [256]byte{}/* 256 elements not displayed */

From Gambatte emulator

View Source 
var OPCodeAccurate = [256]byte{}/* 256 elements not displayed */
View Source 
var OPCodeBranchMachineCycles = [256]byte{}/* 256 elements not displayed */
View Source 
var OPCodeCBAccurate = [256]byte{}/* 256 elements not displayed */
View Source 
var OPCodeCBMachineCycles = [256]byte{}/* 256 elements not displayed */
View Source 
var OPCodeMachineCycles = [256]byte{}/* 256 elements not displayed */

Functions

func CheckBit 

func CheckBit(value byte, bit int) bool

func ClearBit 

func ClearBit(value byte, bit int) byte

func SetBit 

func SetBit(value byte, bit int) byte

Types

type APU 

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

func NewAPU 

func NewAPU(console *Console) *APU

func (*APU) Read 

func (apu *APU) Read(addr uint16) byte

func (*APU) ReadSoundBuffer 

func (apu *APU) ReadSoundBuffer(toFill []byte) []byte

func (*APU) Reset 

func (apu *APU) Reset()

func (*APU) Step 

func (apu *APU) Step(cycleCount byte)

func (*APU) Write 

func (apu *APU) Write(addr uint16, value byte)

type APURingBuffer 

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

func NewAPURingBuffer 

func NewAPURingBuffer() *APURingBuffer

func (*APURingBuffer) Read 

func (a *APURingBuffer) Read(preSizedBuf []byte) []byte

func (*APURingBuffer) Write 

func (a *APURingBuffer) Write(bytes []byte) (writeCount int)

type APUWave 

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

func (*APUWave) GetSample 

func (a *APUWave) GetSample() (byte, byte)

type APUWaveType 

type APUWaveType int

type CPU 

type CPU struct {
	AF *CPURegister
	BC *CPURegister
	DE *CPURegister
	HL *CPURegister

	PC *CPURegister
	SP *CPURegister

	OpCodeTable   [256]CPUOpCodeEntity
	OpCodeCBTable [256]CPUOpCodeEntity

	IME         bool
	Halt        bool
	BranchTaken bool
	SkipPCBug   bool

	CurrentClockCycles   uint64
	DIVCycles            uint32
	TIMACycles           uint32
	SerialBit            int
	SerialCycles         int
	IMECycles            int
	UnhaltCycles         int
	InterruptDelayCycles int
	AccurateOpeCodeState int
	SpeedMultiplier      int
	ReadCache            byte
	// contains filtered or unexported fields
}

func NewCPU 

func NewCPU(console *Console) *CPU

func (*CPU) CheckFlag 

func (c *CPU) CheckFlag(flag byte) bool

func (*CPU) ClearAllFlags 

func (c *CPU) ClearAllFlags()

func (*CPU) ClearFlag 

func (c *CPU) ClearFlag(flag byte)

func (*CPU) FlipFlag 

func (c *CPU) FlipFlag(flag byte)

func (*CPU) Halted 

func (c *CPU) Halted() bool

func (*CPU) InterruptIsAboutToRaise 

func (c *CPU) InterruptIsAboutToRaise() bool

func (*CPU) InterruptPending 

func (c *CPU) InterruptPending() CPUInterrupt

func (*CPU) KeepCarryFlag 

func (c *CPU) KeepCarryFlag()

XXX: naming

func (*CPU) KeepZeroFlag 

func (c *CPU) KeepZeroFlag()

XXX: naming

func (*CPU) MemoryLoad 

func (c *CPU) MemoryLoad(addr uint16, value byte)

func (*CPU) MemoryRead 

func (c *CPU) MemoryRead(addr uint16) byte

func (*CPU) MemoryRetrieve 

func (c *CPU) MemoryRetrieve(addr uint16) byte

func (*CPU) MemoryWrite 

func (c *CPU) MemoryWrite(addr uint16, value byte)

func (*CPU) RequestInterrupt 

func (c *CPU) RequestInterrupt(interrupt CPUInterrupt)

func (*CPU) Reset 

func (c *CPU) Reset()

func (*CPU) ResetDIVCycles 

func (c *CPU) ResetDIVCycles()

func (*CPU) ResetTIMACycles 

func (c *CPU) ResetTIMACycles()

func (*CPU) ServeInterrupt 

func (c *CPU) ServeInterrupt(interrupt CPUInterrupt)

func (*CPU) SetFlag 

func (c *CPU) SetFlag(flag byte)

func (*CPU) SetZeroFlag 

func (c *CPU) SetZeroFlag(result byte)

func (*CPU) Step 

func (c *CPU) Step(count byte) byte

func (*CPU) UpdateSerial 

func (c *CPU) UpdateSerial(clockCycles byte)

func (*CPU) UpdateTimers 

func (c *CPU) UpdateTimers(clockCycles byte)

type CPUInterrupt 

type CPUInterrupt int

type CPUOpCodeEntity 

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

type CPURegister 

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

func NewCPURegister 

func NewCPURegister() *CPURegister

func (*CPURegister) Decrement 

func (cr *CPURegister) Decrement()

func (*CPURegister) Get 

func (cr *CPURegister) Get() uint16

func (*CPURegister) GetHigh 

func (cr *CPURegister) GetHigh() byte

func (*CPURegister) GetHighPointer 

func (cr *CPURegister) GetHighPointer() *byte

func (*CPURegister) GetLow 

func (cr *CPURegister) GetLow() byte

func (*CPURegister) GetLowPointer 

func (cr *CPURegister) GetLowPointer() *byte

func (*CPURegister) Increment 

func (cr *CPURegister) Increment()

func (*CPURegister) Set 

func (cr *CPURegister) Set(value uint16)

func (*CPURegister) SetHigh 

func (cr *CPURegister) SetHigh(value byte)

func (*CPURegister) SetLow 

func (cr *CPURegister) SetLow(value byte)

type Cartridge 

type Cartridge struct {
	ROM []byte

	RTCPresent bool

	RumblePresent bool
	// contains filtered or unexported fields
}

func NewCartridge 

func NewCartridge(console *Console) *Cartridge

func (*Cartridge) IsRTCPresent added in v1.2.0 

func (c *Cartridge) IsRTCPresent() bool

func (*Cartridge) LoadFromBuffer 

func (c *Cartridge) LoadFromBuffer(buffer []byte)

func (*Cartridge) UpdateCurrentRTC added in v1.2.0 

func (c *Cartridge) UpdateCurrentRTC()

type CartridgeType 

type CartridgeType int

type Console 

type Console struct {
	CPU    *CPU
	Memory *Memory
	PPU    *PPU
	APU    *APU

	Cartridge  *Cartridge
	Controller *Controller
	// contains filtered or unexported fields
}

func NewConsole 

func NewConsole() *Console

func (*Console) GetLCDColor 

func (console *Console) GetLCDColor(index int) color.RGBA

func (*Console) LoadFromBuffer 

func (console *Console) LoadFromBuffer(data []byte)

func (*Console) RunToVBlank 

func (console *Console) RunToVBlank()

func (*Console) SetButtonState 

func (console *Console) SetButtonState(button int, pressed bool)

func (*Console) SetPixels 

func (console *Console) SetPixels(pixels []byte)

func (*Console) SetSoundBuffer 

func (console *Console) SetSoundBuffer(buffer []byte)

type Controller 

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

func NewController 

func NewController(console *Console) *Controller

func (*Controller) KeyPressed 

func (c *Controller) KeyPressed(key GameBoyKeys)

func (*Controller) KeyReleased 

func (c *Controller) KeyReleased(key GameBoyKeys)

func (*Controller) Read 

func (c *Controller) Read() byte

func (*Controller) Reset 

func (c *Controller) Reset()

func (*Controller) Step 

func (c *Controller) Step(clockCycles byte)

func (*Controller) Update 

func (c *Controller) Update()

func (*Controller) Write 

func (c *Controller) Write(value byte)

type EnvelopeDirection 

type EnvelopeDirection bool
const (
	ENVELOPE_UP   EnvelopeDirection = true
	ENVELOPE_DOWN                   = false
)

type GameBoyColorPixelFormat 

type GameBoyColorPixelFormat int

type GameBoyKeys 

type GameBoyKeys int

type Memory 

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

func NewMemory 

func NewMemory(console *Console) *Memory

func (*Memory) CommonPerformRead 

func (m *Memory) CommonPerformRead(addr uint16) byte

func (*Memory) CommonPerformWrite 

func (m *Memory) CommonPerformWrite(addr uint16, value byte)

func (*Memory) IORegistersPerformRead 

func (m *Memory) IORegistersPerformRead(addr uint16) byte

func (*Memory) IORegistersPerformWrite 

func (m *Memory) IORegistersPerformWrite(addr uint16, value byte)

func (*Memory) Load 

func (m *Memory) Load(addr uint16, value byte)

func (*Memory) PerformDMA 

func (m *Memory) PerformDMA(value byte)

func (*Memory) Read 

func (m *Memory) Read(addr uint16) byte

func (*Memory) Reset 

func (m *Memory) Reset()

func (*Memory) Retrieve 

func (m *Memory) Retrieve(addr uint16) byte

func (*Memory) SetMemoryBankController 

func (m *Memory) SetMemoryBankController()

func (*Memory) Write 

func (m *Memory) Write(addr uint16, value byte)

type MemoryBankController 

type MemoryBankController interface {
	PerformRead(addr uint16) byte
	PerformWrite(addr uint16, value byte)
}

func NewMemoryBankControllerMBC1 

func NewMemoryBankControllerMBC1(console *Console) MemoryBankController

func NewMemoryBankControllerMBC2 

func NewMemoryBankControllerMBC2(console *Console) MemoryBankController

func NewMemoryBankControllerMBC3 added in v1.2.0 

func NewMemoryBankControllerMBC3(console *Console) MemoryBankController

func NewMemoryBankControllerMBC5 added in v1.2.0 

func NewMemoryBankControllerMBC5(console *Console) MemoryBankController

func NewMemoryBankControllerNoMBC 

func NewMemoryBankControllerNoMBC(console *Console) MemoryBankController

type MemoryBankControllerMBC1 

type MemoryBankControllerMBC1 struct {
	// contains filtered or unexported fields
}

func (*MemoryBankControllerMBC1) PerformRead 

func (m *MemoryBankControllerMBC1) PerformRead(addr uint16) byte

func (*MemoryBankControllerMBC1) PerformWrite 

func (m *MemoryBankControllerMBC1) PerformWrite(addr uint16, value byte)

type MemoryBankControllerMBC2 

type MemoryBankControllerMBC2 struct {
	// contains filtered or unexported fields
}

func (*MemoryBankControllerMBC2) PerformRead 

func (m *MemoryBankControllerMBC2) PerformRead(addr uint16) byte

func (*MemoryBankControllerMBC2) PerformWrite 

func (m *MemoryBankControllerMBC2) PerformWrite(addr uint16, value byte)

type MemoryBankControllerMBC3 added in v1.2.0 

type MemoryBankControllerMBC3 struct {
	// contains filtered or unexported fields
}

func (*MemoryBankControllerMBC3) PerformRead added in v1.2.0 

func (m *MemoryBankControllerMBC3) PerformRead(addr uint16) byte

func (*MemoryBankControllerMBC3) PerformWrite added in v1.2.0 

func (m *MemoryBankControllerMBC3) PerformWrite(addr uint16, value byte)

func (*MemoryBankControllerMBC3) UpdateRTC added in v1.2.0 

func (m *MemoryBankControllerMBC3) UpdateRTC()

type MemoryBankControllerMBC5 added in v1.2.0 

type MemoryBankControllerMBC5 struct {
	// contains filtered or unexported fields
}

func (*MemoryBankControllerMBC5) PerformRead added in v1.2.0 

func (m *MemoryBankControllerMBC5) PerformRead(addr uint16) byte

func (*MemoryBankControllerMBC5) PerformWrite added in v1.2.0 

func (m *MemoryBankControllerMBC5) PerformWrite(addr uint16, value byte)

type MemoryBankControllerNoMBC 

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

func (*MemoryBankControllerNoMBC) PerformRead 

func (m *MemoryBankControllerNoMBC) PerformRead(addr uint16) byte

func (*MemoryBankControllerNoMBC) PerformWrite 

func (m *MemoryBankControllerNoMBC) PerformWrite(addr uint16, value byte)

type PPU 

type PPU struct {
	SpriteXCacheBuffer [GAMEBOY_WIDTH * GAMEBOY_HEIGHT]int
	ColorCacheBuffer   [GAMEBOY_WIDTH * GAMEBOY_HEIGHT]byte
	FrameBuffer        [GAMEBOY_WIDTH * GAMEBOY_HEIGHT]byte
	ColorFrameBuffer   [GAMEBOY_WIDTH * GAMEBOY_HEIGHT]uint16

	GameBoyColorSpritePalettes     [8][4][2]uint16
	GameBoyColorBackgroundPalettes [8][4][2]uint16
	// contains filtered or unexported fields
}

func NewPPU 

func NewPPU(console *Console) *PPU

func (*PPU) CompareLYToLYC 

func (p *PPU) CompareLYToLYC()

func (*PPU) DisableScreen 

func (p *PPU) DisableScreen()

func (*PPU) EnableScreen 

func (p *PPU) EnableScreen()

func (*PPU) GetCurrentStatusMode 

func (p *PPU) GetCurrentStatusMode() int

func (*PPU) GetIRQ48Signal 

func (p *PPU) GetIRQ48Signal() byte

func (*PPU) RenderBG 

func (p *PPU) RenderBG(line int, pixel int)

func (*PPU) RenderSprites 

func (p *PPU) RenderSprites(line int)

func (*PPU) RenderWindow 

func (p *PPU) RenderWindow(line int)

func (*PPU) Reset 

func (p *PPU) Reset()

func (*PPU) ResetWindowLine 

func (p *PPU) ResetWindowLine()

func (*PPU) ScanLine 

func (p *PPU) ScanLine(line int)

func (*PPU) SetIRQ48Signal 

func (p *PPU) SetIRQ48Signal(signal byte)

func (*PPU) Step 

func (p *PPU) Step(clockCycles *byte) bool

func (*PPU) UpdateStatRegister 

func (p *PPU) UpdateStatRegister()

type RTCRegisters added in v1.2.0 

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

type SweepDirection 

type SweepDirection bool
const (
	SWEEP_UP   SweepDirection = false
	SWEEP_DOWN                = true
)

Source Files

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