Struct DmaState 

pub struct DmaState { /* private fields */ }

State of the Direct Memory Access system.

Implementations

impl DmaState

pub fn base_addr(&self) -> u16

Gets the DMA base address.

pub fn active(&self) -> bool

Returns true if DMA is active.

pub fn source_addr(&self) -> u16

Get the source address for the DMA read.

This returns an absolute address within the GameBoy address space.

pub fn dest_addr(&self) -> RelativeAddr

Gets the destination address for the DMA read.

This is a relative address within OAM. The relative base is the default address that OAM is mapped to. Note that because of how RelativeAddr works, this address will be valid for a read directly from OAM no matter where OAM is mapped, however the “raw” address may be wrong if OAM is not mapped in its normal location.

Trait Implementations

impl Clone for DmaState

fn clone(&self) -> DmaState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DmaState

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

Formats the value using the given formatter.

impl Default for DmaState

fn default() -> Self

Returns the “default value” for a type.

impl MemDevice for DmaState

const LEN: usize = 1usize

Length of this MemDevice in bytes. Reads and writes must always be within the device.

fn read_byte_relative(&self, addr: RelativeAddr) -> u8

Read the byte at the specified address.

fn read_bytes_relative(&self, addr: RelativeAddr, data: &mut [u8])

Read a range of bytes into a slice. The read bytes must not wrap past the end of the device.

fn write_byte_relative(&mut self, addr: RelativeAddr, data: u8)

Write the byte at the sepcified address.

fn write_bytes_relative(&mut self, addr: RelativeAddr, data: &[u8])

Write a range of bytes into memory from a slice. The slice must not exceed the length of the MemDevice.

fn read_relative_into<V>(&self, addr: RelativeAddr, dest: &mut V)

where V: MemValue,

Read a typed value from this MemDevice. The value must be fully contained within this device.

fn read_relative<V>(&self, addr: RelativeAddr) -> V

where V: MemValue + Default,

Read a typed value from this MemDevice. The value must be fully contained within this device.

fn write_relative_from<V>(&mut self, addr: RelativeAddr, source: &V)

where V: MemValue,

Write a typed value into this MemDevice. The value must fit fully within the device.

fn write_relative<V>(&mut self, addr: RelativeAddr, val: V)

where V: MemValue,

Write a typed value into this MemDevice. The value must fit fully within the device.

impl PartialEq for DmaState

fn eq(&self, other: &DmaState) -> 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 Eq for DmaState

impl StructuralPartialEq for DmaState