Read actual register values

src/emulator.rs

@@ -15,8 +15,8 @@ use anyhow::Result;
 use egui_toast::{Toast, ToastKind, ToastOptions};
 
 use crate::{audio::Audio, graphics::TextureSink};
-pub use shrooms_vb_core::VBKey;
 use shrooms_vb_core::{Sim, EXPECTED_FRAME_SIZE};
+pub use shrooms_vb_core::{VBKey, VBRegister};
 
 mod shrooms_vb_core;
 
@@ -390,6 +390,13 @@ impl Emulator {
                     }
                 }
             }
+            EmulatorCommand::ReadRegister(sim_id, register, done) => {
+                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
+                    return;
+                };
+                let value = sim.read_register(register);
+                let _ = done.send(value);
+            }
             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);
@@ -447,6 +454,7 @@ pub enum EmulatorCommand {
     StopSecondSim,
     Pause,
     Resume,
+    ReadRegister(SimId, VBRegister, oneshot::Sender<u32>),
     SetAudioEnabled(bool, bool),
     Link,
     Unlink,