Struct VausState 

pub struct VausState { /* private fields */ }

The Arkanoid “Vaus” paddle overlay state.

Models the NES 7-pin variant on $4017: an 8-bit potentiometer value shifted out MSb-first (inverted on the wire) on bit 4, plus a fire button on bit 3.

Implementations

impl VausState

pub const fn new() -> Self

New paddle centered, button released.

pub const fn set(&mut self, position: u8, fire: bool)

Update the live paddle position + fire state. Takes effect on the next conversion (strobe falling edge), matching the standard controller’s latch-on-strobe semantics.

pub const fn write_strobe(&mut self, value: u8)

Handle a $4016 strobe write. On the rising edge the conversion latches the current position into the shift register (we model the conversion as instantaneous, which is the standard fixed-position emulation choice).

pub const fn read(&mut self) -> u8

Read the device byte for a $4017 access, advancing the shift register. Returns the full 8-bit value already positioned on bits 3 (fire) and 4 (knob data); the caller ORs in the open-bus upper bits.

Bit 4 carries the inverted MSb of the shift register (knob data is inverted on the wire per the wiki). Bit 3 carries the fire button (1 = pressed). All other bits are 0.

pub const fn peek(&self) -> u8

Side-effect-free sample of the next device byte (debugger peek).

pub const fn from_parts( position: u8, fire: bool, shift: u8, strobe: bool, ) -> Self

Reconstruct from save-state parts.

pub const fn position_raw(&self) -> u8

Raw potentiometer position (save-state).

pub const fn fire_raw(&self) -> bool

Raw fire state (save-state).

pub const fn shift_raw(&self) -> u8

Raw shift register (save-state).

pub const fn strobe_raw(&self) -> bool

Raw strobe state (save-state).

Trait Implementations

impl Clone for VausState

fn clone(&self) -> VausState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VausState

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

Formats the value using the given formatter.

impl Default for VausState

fn default() -> Self

Returns the “default value” for a type.

impl Copy for VausState