41 lines
1.2 KiB
Rust
41 lines
1.2 KiB
Rust
use std::ops::Index;
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use crate::emu::mmu::Memory;
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use crate::misc::emulator_error::DeviceType::RAM;
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use crate::misc::emulator_error::EmulatorError;
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use crate::misc::result::EmulatorResult;
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const MEM_LENGTH: usize = 2 << 24;
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#[derive(Clone, Debug)]
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pub struct RamMemory {
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data: Box<[u8; MEM_LENGTH]>,
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}
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impl RamMemory {
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pub fn try_new() -> EmulatorResult<RamMemory> {
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let alloc_result = vec![0; MEM_LENGTH].into_boxed_slice();
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let data = alloc_result.try_into().map_err(|err|{
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EmulatorError::AllocationError(RAM,"Allocation failed")
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})?;
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Ok(RamMemory {
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data
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})
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}
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}
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impl Memory for RamMemory {
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fn try_get_byte(&self, address: u32) -> EmulatorResult<u8> {
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log::trace!("Fetch RAM memory at address {}",address);
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let x = *self.data.get(address as usize).ok_or(EmulatorError::UnreachableMemoryError(RAM,address))?;
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Ok(x)
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}
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fn try_set_byte(&mut self, address: u32, value: u8) -> EmulatorResult<()> {
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if address>= MEM_LENGTH as u32 {
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return Err(EmulatorError::UnreachableMemoryError(RAM,address))
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}
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self.data[address as usize] = value;
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Ok(())
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}
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} |