chip8

type ConfigCpu struct {
	// Externals devices
	Display  Display
	Keyboard Keyboard
	Sound    Sound
	Memory   Memory
	Stack    Stack
	Log      io.Writer

	// Registers
	Register Register
	I        uint16

	// Pseudo Registers
	PC uint16
	SP byte
	DT byte
	ST byte
}

type ConfigDisplay struct {
	Output io.Writer
}

type ConfigKeyboard struct {
	Input io.Reader
}

type ConfigMemory struct {
	Rom io.Reader
	Log io.Writer
}

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

type Display interface {
	/*
		Clear should clear the display
	*/
	Clear()

	/*
		Draw should draw the byte on position xDisplay and yDisplay
		If occourres collision returns true
	*/
	Draw(xDisplay, yDisplay, sprite byte) bool

	/*
		Flush should write on output of display
	*/
	Flush()
}

type Instruction []byte

type InstructionSubType byte

type InstructionType byte

type Key byte

type Keyboard interface {
	/*
		KeyDown should return a Key mapping the input to any key of CHIP-8 (0x00 - 0x0F).
		When none key is down return Key(0xFF)
	*/
	KeyDown() Key
}

type Memory interface {
	/*
		Save should saves the register on the memory starting from I on memory
	*/
	Save(register []byte, i uint16)

	/*
		SaveBCD should convert vx to decimal and saves each decimal on addresses I, I+1, I+2
	*/
	SaveBCD(vx byte, i uint16)

	/*
		Load should loads the register on the memory starting from I on memory
	*/
	Load(register []byte, i uint16)

	/*
		LoadInstruction should loads the instruction (2 bytes) of program
	*/
	LoadInstruction(pc uint16) Instruction

	/*
		LoadChar should return the address of char referring to vx
	*/
	LoadChar(vx byte) uint16

	/*
		LoadSprite should return the Sprite on I
	*/
	LoadSprite(i uint16) byte
}

type Register [0x10]byte

type Sound interface {
	/*
		Beep should go off a beep when called
	*/
	Beep()
}

type Stack [0x10]uint16

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

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

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