Struct ProvBgAddrs 

pub struct ProvBgAddrs {
    pub nt: u16,
    pub at: u16,
    pub pattern: u16,
}

The three VRAM addresses that produced one background tile.

Carried as a unit through the PPU’s internal fetch → display cascade (latch → next → cur), so a promotion is one struct copy instead of three separate field moves that could drift out of step with each other.

Fields

nt: u16

Nametable address the tile number came from.

at: u16

Attribute address the palette group came from. Carried rather than derived, because an MMC5 vertical split supplies its own attribute address that the standard $23C0 | ... arithmetic cannot produce.

pattern: u16

CHR address of the pattern row (the low-plane address; the high plane is +8).

Trait Implementations

impl Clone for ProvBgAddrs

fn clone(&self) -> ProvBgAddrs

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProvBgAddrs

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

Formats the value using the given formatter.

impl Default for ProvBgAddrs

fn default() -> ProvBgAddrs

Returns the “default value” for a type.

impl PartialEq for ProvBgAddrs

fn eq(&self, other: &ProvBgAddrs) -> 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 ProvBgAddrs

impl Eq for ProvBgAddrs

impl StructuralPartialEq for ProvBgAddrs