Struct libnoentiendo::memory::BlockMemory

pub struct BlockMemory { /* private fields */ }

Represents a simple block of contiguous memory, with no additional hardware. This can be used to represent both RAM and ROM. Reading from this memory is side-effect free.

Implementations

impl BlockMemory

pub fn ram(size: usize) -> Self

Create a BlockMemory of the given size which clears its contents when reset.

pub fn rom(size: usize) -> Self

Create a BlockMemory of the given size which does not clear its contents when reset.

pub fn from_file(size: usize, file: RomFile) -> Self

Create a BlockMemory of the given size which loads its contents from the given file when reset.

pub fn set_writeable(self, writeable: bool) -> Self

Change whether this BlockMemory is writable.

Trait Implementations

impl Memory for BlockMemory

fn read(&mut self, address: u16) -> u8

Read a byte from this memory at the given address. Implementations may trigger side effects as a result of this read.

fn write(&mut self, address: u16, value: u8)

Write a byte to this memory at the given address.

fn reset(&mut self)

Reset this memory to its initial state, e.g. after a system reboot. Sometimes this will clear the contents of the memory, like with RAM. Other times this is a no-op, e.g. for ROM.

fn poll( &mut self, _cycles_since_poll: u64, _total_cycle_count: u64 ) -> ActiveInterrupt

Poll this memory to see if an interrupt has been triggered. Implementations may trigger an NMI or IRQ for any implementation-dependent reason.