Implement reading from real memory

src/emulator.rs

@@ -3,6 +3,7 @@ use std::{
     fmt::Display,
     fs::{self, File},
     io::{Read, Seek, SeekFrom, Write},
+    ops::Range,
     path::{Path, PathBuf},
     sync::{
         atomic::{AtomicBool, AtomicUsize, Ordering},
@@ -397,6 +398,13 @@ impl Emulator {
                 let value = sim.read_register(register);
                 let _ = done.send(value);
             }
+            EmulatorCommand::ReadMemory(sim_id, addresses, mut buffer, done) => {
+                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
+                    return;
+                };
+                sim.read_memory(addresses, &mut buffer);
+                let _ = done.send(buffer);
+            }
             EmulatorCommand::SetAudioEnabled(p1, p2) => {
                 self.audio_on[SimId::Player1.to_index()].store(p1, Ordering::Release);
                 self.audio_on[SimId::Player2.to_index()].store(p2, Ordering::Release);
@@ -455,6 +463,7 @@ pub enum EmulatorCommand {
     Pause,
     Resume,
     ReadRegister(SimId, VBRegister, oneshot::Sender<u32>),
+    ReadMemory(SimId, Range<u32>, Vec<u8>, oneshot::Sender<Vec<u8>>),
     SetAudioEnabled(bool, bool),
     Link,
     Unlink,