nes

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

type CPU struct {
	Cycles uint64 // Should be big enough
	PC     uint16 // Program counter
	SP     byte   // Stack pointer
	A      byte   // Accumulator
	X      byte   // Index Register X
	Y      byte   // Index Register Y
	C      byte   // Carry FLag
	Z      byte   // Zero Flag
	I      byte   // Interrupt Disable
	D      byte   // Decimal Mode
	B      byte   // Break Command
	U      byte   // Ignored FLag
	V      byte   // Overflow Flag
	N      byte   // Negative Flag

	Memory //Memory Interface
	// contains filtered or unexported fields
}

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

type Cartridge struct {
	PRG     []byte
	CHR     []byte
	SRAM    []byte
	Mapper  byte
	Mirror  byte
	Battery byte
	// contains filtered or unexported fields
}

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

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

type Filter interface {
	Run(x float32) float32
}

type FilterChain []Filter

type FirstOrderFilter struct {
	B0 float32
	B1 float32
	A1 float32
	// contains filtered or unexported fields
}

type Mapper interface {
	Read(address uint16) byte
	Write(address uint16, val byte)
	Run()
}

type Mapper1 struct {
	*Cartridge
	// contains filtered or unexported fields
}

type Mapper2 struct {
	*Cartridge
	// contains filtered or unexported fields
}

type Mapper3 struct {
	*Cartridge
	// contains filtered or unexported fields
}

type Mapper4 struct {
	*Cartridge
	// contains filtered or unexported fields
}

type Mapper7 struct {
	*Cartridge
	// contains filtered or unexported fields
}

type Memory interface {
	Read(address uint16) byte
	Write(address uint16, value byte)
	Read16(address uint16) uint16
}

type NES struct {
	FileName    string
	APU         *APU
	Cartridge   *Cartridge
	Controller1 *Controller
	Controller2 *Controller
	CPU         *CPU
	PPU         *PPU
	RAM         []byte
	Mapper      Mapper
	CPUMemory   Memory
	PPUMemory   Memory
}

type NESFileHeader struct {
	MagicNumber uint32 // NES Magic Number,must be 0x1a53454e
	PRGNum      byte   // PRG-ROM banks number
	CHRNum      byte   // CHR-ROM banks number
	Ctrl1       byte   // Control
	Ctrl2       byte   // Control too
	RAMNum      byte   // RAM number (8KB each)
	// contains filtered or unexported fields
}

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

type PPU struct {
	Memory // memory interface
	NES    *NES

	Cycle    int // 0-340
	ScanLine int // 0-261
	Frame    uint64
	// contains filtered or unexported fields
}

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

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

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