Enum VsPpuType 

pub enum VsPpuType {
    None,
    Rp2C03,
    Rp2C04_0001,
    Rp2C04_0002,
    Rp2C04_0003,
    Rp2C04_0004,
    Rc2C05_01,
    Rc2C05_02,
    Rc2C05_03,
    Rc2C05_04,
}

Vs. System PPU type from NES 2.0 header byte 13 low nibble.

Only meaningful when the console type (byte 7) is ConsoleType::VsSystem; otherwise VsPpuType::None. Per nesdev “NES 2.0” §Vs. System Type and “PPU registers” §2C05 identifier.

Variants

None

Not a Vs. System cart (the default for NES/Famicom + PlayChoice-10).

Rp2C03

$0: any RP2C03/RC2C03 variant.

Rp2C04_0001

$2: RP2C04-0001.

Rp2C04_0002

$3: RP2C04-0002.

Rp2C04_0003

$4: RP2C04-0003.

Rp2C04_0004

$5: RP2C04-0004.

Rc2C05_01

$8: RC2C05-01 (signature unknown; the sole known game does not check $2002).

Rc2C05_02

$9: RC2C05-02 ($2002 AND $3F = $3D).

Rc2C05_03

$A: RC2C05-03 ($2002 AND $1F = $1C).

Rc2C05_04

$B: RC2C05-04 ($2002 AND $1F = $1B).

Implementations

impl VsPpuType

pub const fn from_byte13_low_nibble(nibble: u8) -> Self

Decode the NES 2.0 byte-13 low nibble into a Vs. PPU type. Reserved / unknown nibbles fall back to VsPpuType::Rp2C03 (the most common RGB PPU), matching how most emulators treat unspecified Vs. carts.

pub const fn ppu_palette(self) -> VsPpuPalette

Resolve to the output palette.

pub const fn is_2c05(self) -> bool

True for the 2C05 series ($2000/$2001 swap + $2002 identifier).

pub const fn ppu_2c05_id(self) -> u8

The byte returned in the low 5 bits of $2002 on a 2C05 (0 otherwise).

The 2C05-01 signature is unknown (the only known game, Ninja Jajamaru-kun, never reads it), so it returns 0.

Trait Implementations

impl Clone for VsPpuType

fn clone(&self) -> VsPpuType

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for VsPpuType

impl Debug for VsPpuType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for VsPpuType

fn default() -> VsPpuType

Returns the “default value” for a type.

impl Eq for VsPpuType

impl Hash for VsPpuType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for VsPpuType

fn eq(&self, other: &VsPpuType) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for VsPpuType