Struct MapperFrameEvents 

pub struct MapperFrameEvents {
    pub quarter: bool,
    pub half: bool,
}

APU frame-counter event mask fanned out to the mapper, used by on-cart audio extensions (MMC5, FDS, …) whose internal envelopes / length counters share the CPU’s frame-counter clocks.

The bus calls Mapper::notify_frame_event once per CPU cycle, passing the events the APU’s frame counter fired on the same cycle. For mappers without on-cart audio (or with audio that doesn’t use envelopes / length counters, like VRC6) the default no-op impl is used.

The struct shape matches rustynes_apu::frame_counter::FrameEvents 1:1; the duplication is deliberate — rustynes-mappers does not depend on rustynes-apu, and the bus is responsible for translating between the two types.

Fields

quarter: bool

Quarter-frame: clock envelopes.

half: bool

Half-frame: clock length counters (and sweeps, for 2A03 — but MMC5 pulses have no sweep unit).

Trait Implementations

impl Clone for MapperFrameEvents

fn clone(&self) -> MapperFrameEvents

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MapperFrameEvents

impl Debug for MapperFrameEvents

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

Formats the value using the given formatter.

impl Default for MapperFrameEvents

fn default() -> MapperFrameEvents

Returns the “default value” for a type.

impl Eq for MapperFrameEvents

impl PartialEq for MapperFrameEvents

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MapperFrameEvents