Enum PpuRegion 

pub enum PpuRegion {
    Ntsc,
    Pal,
    Dendy,
}

Region governs the size of the post-render-to-pre-render scanline span.

Variants

Ntsc

NTSC (and Famicom). 262 scanlines per frame, pre-render = scanline 261.

Pal

PAL. 312 scanlines per frame, pre-render = scanline 311.

Dendy

Dendy (Russian PAL famiclone). 312 scanlines, but VBL starts at 291.

Implementations

impl PpuRegion

pub const fn prerender_line(self) -> i16

Pre-render scanline number.

pub const fn last_visible_line(self) -> i16

Last visible scanline (always 239).

pub const fn vblank_start_line(self) -> i16

Scanline at which V-blank starts (and PPUSTATUS.VBLANK is set on dot 1).

pub const fn post_reset_mask_cycles(self) -> u32

Number of CPU cycles $2000/$2001/$2005/$2006 writes are ignored after a power-on / reset. Per nesdev wiki: NTSC ≈ 29,658; PAL ≈ 33,132.

Trait Implementations

impl Clone for PpuRegion

fn clone(&self) -> PpuRegion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PpuRegion

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

Formats the value using the given formatter.

impl Hash for PpuRegion

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 PpuRegion

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for PpuRegion

impl Eq for PpuRegion

impl StructuralPartialEq for PpuRegion