device

package

v0.0.0-...-19e7a64 Latest Latest Go to latest Published: Oct 19, 2021 License: MIT Imports: 3 Imported by: 0

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Contains structs and methods for the chip-8 memory.

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const RamStartLocation = 0x200

This section is empty.

func DecodeKey(keyboardMask uint16) byte

Decode which key is pressed, emulator Does not support multiple key presses and the rightmost will be selected.

func NewKeyboard(keyboardBuffer *uint16) *chip8Keyboard

Initialise a new keyboard whose buffer is shared Between emulator logic and device logic.

func NewRegisters(soundBuffer *bool) *chip8Registers

Initialise a new register with a sound buffer.

type CarryFunction func(byte, byte) byte

This type of function is used to determine VF.

type LogicalInstructionType uint8

const (
	Load LogicalInstructionType = iota
	Or
	And
	Xor
	Add
	Sub
	Shr
	Subn
	Shl = 0xE
)

type OperationFunction func(byte, byte) byte

This type of function is used to operate on register values.

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

Main processor of the Chip-8

func NewProcessor(screenBuffer *[32]uint64, keyboardBuffer *uint16, soundBuffer *bool) *Processor

func (p *Processor) Cycle()

Run a CPU Fetch/Execute cycle.

func (p *Processor) LoadETIProgram(program []byte, programSize uint16)

Load an ETI program to the memory and set the program counter accordingly.

func (p *Processor) LoadProgram(program []byte, programSize uint16)

Load a standard Chip-8 Program to the memory And set the program counter accordingly.

func (p *Processor) ShouldHalt() bool

Returns true if the processor should halt.