Update all deps

Cargo.toml

@@ -16,11 +16,11 @@ bytemuck = { version = "1", features = ["derive"] }
 clap = { version = "4", features = ["derive"] }
 cpal = { git = "https://github.com/sidit77/cpal.git", rev = "66ed6be" }
 directories = "6"
-egui = { version = "0.32", features = ["serde"] }
-egui_extras = { version = "0.32", features = ["image"] }
-egui-notify = "0.20"
-egui-winit = "0.32"
-egui-wgpu = { version = "0.32", features = ["winit"] }
+egui = { version = "0.33", features = ["serde"] }
+egui_extras = { version = "0.33", features = ["image"] }
+egui-notify = "0.21"
+egui-winit = "0.33"
+egui-wgpu = { version = "0.33", features = ["winit"] }
 fxprof-processed-profile = "0.8"
 fixed = { version = "1.28", features = ["num-traits"] }
 gilrs = { version = "0.11", features = ["serde-serialize"] }
@@ -29,9 +29,10 @@ hex = "0.4"
 image = { version = "0.25", default-features = false, features = ["png"] }
 itertools = "0.14"
 normpath = "1"
+notify = "8"
 num-derive = "0.4"
 num-traits = "0.2"
-object = "0.37"
+object = "0.38"
 oneshot = "0.1"
 pollster = "0.4"
 rand = "0.9"
@@ -40,16 +41,16 @@ rtrb = "0.3"
 rubato = "0.16"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-thread-priority = "2"
+thread-priority = "3"
 tokio = { version = "1", features = ["io-util", "macros", "net", "rt", "sync", "time"] }
 tracing = { version = "0.1", features = ["release_max_level_info"] }
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
-wgpu = "25"
+wgpu = "27"
 wholesym = "0.8"
 winit = { version = "0.30", features = ["serde"] }
 
 [target.'cfg(windows)'.dependencies]
-windows = { version = "0.61", features = ["Win32_System_Threading"] }
+windows = { version = "0.62", features = ["Win32_System_Threading"] }
 
 [build-dependencies]
 cc = "1"

build.Dockerfile

@@ -16,7 +16,7 @@ RUN apt-get update && \
     ln -s $(which ld64.lld-20) /usr/bin/ld64.lld && \
     SDK_VERSION=14.5 UNATTENDED=1 ENABLE_COMPILER_RT_INSTALL=1 TARGET_DIR=/osxcross ./build.sh
 
-FROM rust:1.89-bookworm
+FROM rust:1.91-bookworm
 ADD --chmod=644 "https://apt.llvm.org/llvm-snapshot.gpg.key" /etc/apt/trusted.gpg.d/apt.llvm.org.asc
 COPY llvm.sources /etc/apt/sources.list.d/llvm.sources
 RUN rustup target add x86_64-pc-windows-msvc && \

build.rs

@@ -21,6 +21,7 @@ fn main() -> Result<(), Box<dyn Error>> {
         .include(Path::new("shrooms-vb-core/util"))
         .opt_level(opt_level)
         .flag_if_supported("-fno-strict-aliasing")
+        .define("_CRT_SECURE_NO_WARNINGS", None)
         .define("VB_LITTLE_ENDIAN", None)
         .define("VB_SIGNED_PROPAGATE", None)
         .define("VB_DIV_GENERIC", None)

shrooms-vb-core

@@ -1 +1 @@
-Subproject commit 4ed3b7299507b8ea0079a0965f33b0c8a6886572
+Subproject commit 534ce852f46f1deba9014971b1bae29e974984d7

src/app.rs

@@ -16,6 +16,7 @@ use winit::{
 };
 
 use crate::{
+    config::CliArgs,
     controller::ControllerManager,
     emulator::{EmulatorClient, EmulatorCommand, SimId},
     images::ImageProcessor,
@@ -55,18 +56,24 @@ pub struct Application {
     focused: Option<ViewportId>,
     init_debug_port: Option<u16>,
     init_profiling: bool,
+    init_bgmap: bool,
+    init_chardata: bool,
+    init_objects: bool,
+    init_worlds: bool,
+    init_framebuffers: bool,
+    init_registers: bool,
+    init_terminal: bool,
 }
 
 impl Application {
     pub fn new(
         client: EmulatorClient,
         proxy: EventLoopProxy<UserEvent>,
-        debug_port: Option<u16>,
-        profiling: bool,
+        persistence: Persistence,
+        args: CliArgs,
     ) -> Self {
         let wgpu = WgpuState::new();
         let icon = load_icon().ok().map(Arc::new);
-        let persistence = Persistence::new();
         let mappings = MappingProvider::new(persistence.clone());
         let shortcuts = ShortcutProvider::new(persistence.clone());
         let controllers = ControllerManager::new(client.clone(), &mappings);
@@ -90,8 +97,15 @@ impl Application {
             persistence,
             viewports: HashMap::new(),
             focused: None,
-            init_debug_port: debug_port,
-            init_profiling: profiling,
+            init_debug_port: args.debug_port,
+            init_profiling: args.profile,
+            init_bgmap: args.bgmap_data,
+            init_chardata: args.character_data,
+            init_objects: args.object_data,
+            init_worlds: args.worlds,
+            init_framebuffers: args.frame_buffers,
+            init_registers: args.registers,
+            init_terminal: args.terminal,
         }
     }
 
@@ -124,11 +138,40 @@ impl ApplicationHandler<UserEvent> for Application {
             SimId::Player1,
         );
         self.open(event_loop, Box::new(app));
+        let sim_id = SimId::Player1;
         if self.init_profiling {
-            let mut profiler = ProfileWindow::new(SimId::Player1, self.client.clone());
+            let mut profiler = ProfileWindow::new(sim_id, self.client.clone());
             profiler.launch();
             self.open(event_loop, Box::new(profiler));
         }
+        if self.init_chardata {
+            let chardata = CharacterDataWindow::new(sim_id, &self.memory, &mut self.images);
+            self.open(event_loop, Box::new(chardata));
+        }
+        if self.init_bgmap {
+            let bgmap = BgMapWindow::new(sim_id, &self.memory, &mut self.images);
+            self.open(event_loop, Box::new(bgmap));
+        }
+        if self.init_objects {
+            let objects = ObjectWindow::new(sim_id, &self.memory, &mut self.images);
+            self.open(event_loop, Box::new(objects));
+        }
+        if self.init_worlds {
+            let world = WorldWindow::new(sim_id, &self.memory, &mut self.images);
+            self.open(event_loop, Box::new(world));
+        }
+        if self.init_framebuffers {
+            let fb = FrameBufferWindow::new(sim_id, &self.memory, &mut self.images);
+            self.open(event_loop, Box::new(fb));
+        }
+        if self.init_registers {
+            let registers = RegisterWindow::new(sim_id, &self.memory);
+            self.open(event_loop, Box::new(registers));
+        }
+        if self.init_terminal {
+            let terminal = TerminalWindow::new(sim_id, &self.client);
+            self.open(event_loop, Box::new(terminal));
+        }
     }
 
     fn window_event(
@@ -244,8 +287,8 @@ impl ApplicationHandler<UserEvent> for Application {
                 self.open(event_loop, Box::new(world));
             }
             UserEvent::OpenFrameBuffers(sim_id) => {
-                let world = FrameBufferWindow::new(sim_id, &self.memory, &mut self.images);
-                self.open(event_loop, Box::new(world));
+                let fb = FrameBufferWindow::new(sim_id, &self.memory, &mut self.images);
+                self.open(event_loop, Box::new(fb));
             }
             UserEvent::OpenRegisters(sim_id) => {
                 let registers = RegisterWindow::new(sim_id, &self.memory);
@@ -406,13 +449,12 @@ impl Viewport {
             ..egui_wgpu::WgpuConfiguration::default()
         };
 
+        let options = egui_wgpu::RendererOptions::default();
         let mut painter = pollster::block_on(egui_wgpu::winit::Painter::new(
             ctx.clone(),
             wgpu_config,
-            1,
-            None,
             false,
-            true,
+            options,
         ));
 
         let mut info = ViewportInfo::default();
@@ -511,7 +553,7 @@ impl Viewport {
             &mut self.info,
             std::mem::take(&mut self.commands),
             &self.window,
-            &mut HashSet::default(),
+            &mut vec![],
         );
 
         if self.info.close_requested() {

src/config.rs

@@ -0,0 +1,96 @@
+use anyhow::Result;
+use clap::Parser;
+use egui::{Color32, Vec2};
+use serde::{Deserialize, Serialize};
+
+use crate::{emulator::SimId, persistence::Persistence, window::DisplayMode};
+use std::path::PathBuf;
+
+#[derive(Parser)]
+pub struct CliArgs {
+    /// The path to a virtual boy ROM to run.
+    pub rom: Option<PathBuf>,
+    /// Start a GDB/LLDB debug server on this port.
+    #[arg(short, long)]
+    pub debug_port: Option<u16>,
+    /// Enable profiling a game
+    #[arg(short, long)]
+    pub profile: bool,
+    /// Open character data window
+    #[arg(short, long)]
+    pub character_data: bool,
+    /// Open bgmap data window
+    #[arg(short, long)]
+    pub bgmap_data: bool,
+    /// Open object data window
+    #[arg(short, long)]
+    pub object_data: bool,
+    /// Open worlds window
+    #[arg(long)]
+    pub worlds: bool,
+    /// Open frame buffers window
+    #[arg(short, long)]
+    pub frame_buffers: bool,
+    /// Open registers window
+    #[arg(short, long)]
+    pub registers: bool,
+    /// Open terminal
+    #[arg(short, long)]
+    pub terminal: bool,
+    /// Watch ROM files for changes, automatically reload
+    #[arg(short, long)]
+    pub watch: bool,
+}
+
+pub const COLOR_PRESETS: [[Color32; 2]; 3] = [
+    [
+        Color32::from_rgb(0xff, 0x00, 0x00),
+        Color32::from_rgb(0x00, 0xc6, 0xf0),
+    ],
+    [
+        Color32::from_rgb(0x00, 0xb4, 0x00),
+        Color32::from_rgb(0xc8, 0x00, 0xff),
+    ],
+    [
+        Color32::from_rgb(0xb4, 0x9b, 0x00),
+        Color32::from_rgb(0x00, 0x00, 0xff),
+    ],
+];
+
+const fn default_audio_enabled() -> bool {
+    true
+}
+
+#[derive(Serialize, Deserialize, Clone, PartialEq, Eq)]
+pub struct SimConfig {
+    pub display_mode: DisplayMode,
+    pub colors: [Color32; 2],
+    pub dimensions: Vec2,
+    #[serde(default = "default_audio_enabled")]
+    pub audio_enabled: bool,
+}
+
+impl SimConfig {
+    pub fn load(persistence: &Persistence, sim_id: SimId) -> Self {
+        if let Ok(config) = persistence.load_config(config_filename(sim_id)) {
+            return config;
+        }
+        Self {
+            display_mode: DisplayMode::Anaglyph,
+            colors: COLOR_PRESETS[0],
+            dimensions: DisplayMode::Anaglyph.proportions() + Vec2::new(0.0, 22.0),
+            audio_enabled: true,
+        }
+    }
+
+    pub fn save(&self, persistence: &Persistence, sim_id: SimId) -> Result<()> {
+        persistence.save_config(config_filename(sim_id), self)
+    }
+}
+
+fn config_filename(sim_id: SimId) -> &'static str {
+    match sim_id {
+        SimId::Player1 => "config_p1",
+        SimId::Player2 => "config_p2",
+    }
+}

src/emulator.rs

@@ -5,7 +5,7 @@ use std::{
     sync::{
         Arc, Weak,
         atomic::{AtomicBool, Ordering},
-        mpsc::{self, RecvError, TryRecvError},
+        mpsc::{self, RecvTimeoutError, TryRecvError},
     },
     time::Duration,
 };
@@ -75,6 +75,7 @@ pub struct EmulatorBuilder {
     audio_on: Arc<[AtomicBool; 2]>,
     linked: Arc<AtomicBool>,
     start_paused: bool,
+    watch_rom: Arc<[AtomicBool; 2]>,
 }
 
 impl EmulatorBuilder {
@@ -91,12 +92,13 @@ impl EmulatorBuilder {
             audio_on: Arc::new([AtomicBool::new(true), AtomicBool::new(true)]),
             linked: Arc::new(AtomicBool::new(false)),
             start_paused: false,
+            watch_rom: Arc::new([AtomicBool::new(false), AtomicBool::new(false)]),
         };
         let client = EmulatorClient {
             queue,
             sim_state: builder.sim_state.clone(),
             state: builder.state.clone(),
-            audio_on: builder.audio_on.clone(),
+            watch_rom: builder.watch_rom.clone(),
             linked: builder.linked.clone(),
         };
         (builder, client)
@@ -116,12 +118,25 @@ impl EmulatorBuilder {
         }
     }
 
+    pub fn with_audio_on(self, p1: bool, p2: bool) -> Self {
+        self.audio_on[0].store(p1, Ordering::Relaxed);
+        self.audio_on[1].store(p2, Ordering::Relaxed);
+        self
+    }
+
+    pub fn with_watch_rom(self, p1: bool, p2: bool) -> Self {
+        self.watch_rom[0].store(p1, Ordering::Relaxed);
+        self.watch_rom[1].store(p2, Ordering::Relaxed);
+        self
+    }
+
     pub fn build(self) -> Result<Emulator> {
         let mut emulator = Emulator::new(
             self.commands,
             self.sim_state,
             self.state,
             self.audio_on,
+            self.watch_rom,
             self.linked,
         )?;
         if let Some(path) = self.rom {
@@ -142,6 +157,7 @@ pub struct Emulator {
     sim_state: Arc<[Atomic<SimState>; 2]>,
     state: Arc<Atomic<EmulatorState>>,
     audio_on: Arc<[AtomicBool; 2]>,
+    watch_rom: Arc<[AtomicBool; 2]>,
     linked: Arc<AtomicBool>,
     profilers: [Option<ProfileSender>; 2],
     renderers: HashMap<SimId, TextureSink>,
@@ -160,6 +176,7 @@ impl Emulator {
         sim_state: Arc<[Atomic<SimState>; 2]>,
         state: Arc<Atomic<EmulatorState>>,
         audio_on: Arc<[AtomicBool; 2]>,
+        watch_rom: Arc<[AtomicBool; 2]>,
         linked: Arc<AtomicBool>,
     ) -> Result<Self> {
         Ok(Self {
@@ -170,6 +187,7 @@ impl Emulator {
             sim_state,
             state,
             audio_on,
+            watch_rom,
             linked,
             profilers: [None, None],
             renderers: HashMap::new(),
@@ -183,9 +201,18 @@ impl Emulator {
         })
     }
 
+    pub fn reload_cart(&mut self, sim_id: SimId) -> Result<()> {
+        let Some(cart) = &self.carts[sim_id.to_index()] else {
+            return Ok(());
+        };
+        let path = cart.file_path.clone();
+        self.load_cart(sim_id, &path)
+    }
+
     pub fn load_cart(&mut self, sim_id: SimId, path: &Path) -> Result<()> {
-        let cart = Cart::load(path, sim_id)?;
-        self.reset_sim(sim_id, Some(cart))?;
+        let watch = self.watch_rom[sim_id.to_index()].load(Ordering::Acquire);
+        let cart = Cart::load(path, sim_id, watch)?;
+        self.try_reset_sim(sim_id, Some(cart))?;
         Ok(())
     }
 
@@ -195,16 +222,26 @@ impl Emulator {
         } else {
             self.carts[0].as_ref().map(|c| c.file_path.clone())
         };
+        let watch = self.watch_rom[SimId::Player2.to_index()].load(Ordering::Acquire);
         let cart = match file_path {
-            Some(rom_path) => Some(Cart::load(&rom_path, SimId::Player2)?),
+            Some(rom_path) => Some(Cart::load(&rom_path, SimId::Player2, watch)?),
             None => None,
         };
-        self.reset_sim(SimId::Player2, cart)?;
+        self.try_reset_sim(SimId::Player2, cart)?;
         self.link_sims();
         Ok(())
     }
 
-    fn reset_sim(&mut self, sim_id: SimId, new_cart: Option<Cart>) -> Result<()> {
+    fn reset_sim(&mut self, sim_id: SimId, new_cart: Option<Cart>) -> bool {
+        if let Err(error) = self.try_reset_sim(sim_id, new_cart) {
+            self.report_error(sim_id, format!("Error resetting sim: {error}"));
+            false
+        } else {
+            true
+        }
+    }
+
+    fn try_reset_sim(&mut self, sim_id: SimId, new_cart: Option<Cart>) -> Result<()> {
         self.save_sram(sim_id)?;
 
         let index = sim_id.to_index();
@@ -225,6 +262,10 @@ impl Emulator {
             sim.load_cart(cart.rom.clone(), cart.sram.clone())?;
             self.carts[index] = Some(cart);
             self.sim_state[index].store(SimState::Ready, Ordering::Release);
+        } else if let Some(cart) = self.carts[index].as_mut()
+            && cart.is_watching()
+        {
+            cart.restart_watching();
         }
         let mut profiling = false;
         if let Some(profiler) = self.profilers[sim_id.to_index()].as_ref()
@@ -341,7 +382,7 @@ impl Emulator {
 
     fn start_profiling(&mut self, sim_id: SimId, sender: ProfileSender) -> Result<()> {
         self.profilers[sim_id.to_index()] = Some(sender);
-        self.reset_sim(sim_id, None)
+        self.try_reset_sim(sim_id, None)
     }
 
     fn start_debugging(&mut self, sim_id: SimId, sender: DebugSender) {
@@ -417,11 +458,30 @@ impl Emulator {
             let idle = self.tick();
             if idle {
                 // The game is paused, and we have output all the video/audio we have.
-                // Block the thread until a new command comes in.
-                match self.commands.recv() {
-                    Ok(command) => self.handle_command(command),
-                    Err(RecvError) => {
-                        return;
+                // Block the thread until a new command comes in, or a ROM changes.
+                loop {
+                    match self.commands.recv_timeout(Duration::from_millis(250)) {
+                        Ok(command) => {
+                            self.handle_command(command);
+                            break;
+                        }
+                        Err(RecvTimeoutError::Timeout) => {
+                            let mut changed = false;
+                            for sim_id in SimId::values() {
+                                let Some(cart) = self.carts[sim_id.to_index()].as_ref() else {
+                                    continue;
+                                };
+                                if cart.changed() {
+                                    changed |= self.reset_sim(sim_id, None);
+                                }
+                            }
+                            if changed {
+                                break;
+                            }
+                        }
+                        Err(RecvTimeoutError::Disconnected) => {
+                            return;
+                        }
                     }
                 }
             }
@@ -436,6 +496,14 @@ impl Emulator {
                     }
                 }
             }
+            for sim_id in SimId::values() {
+                let Some(cart) = self.carts[sim_id.to_index()].as_ref() else {
+                    continue;
+                };
+                if cart.changed() {
+                    self.reset_sim(sim_id, None);
+                }
+            }
             self.watched_regions.retain(|range, region| {
                 let Some(region) = region.upgrade() else {
                     return false;
@@ -602,6 +670,22 @@ impl Emulator {
                     self.report_error(sim_id, format!("Error loading rom: {error}"));
                 }
             }
+            EmulatorCommand::ReloadRom(sim_id) => {
+                if let Err(error) = self.reload_cart(sim_id) {
+                    self.report_error(sim_id, format!("Error loading rom: {error}"));
+                }
+            }
+            EmulatorCommand::WatchRom(sim_id, watch) => {
+                self.watch_rom[sim_id.to_index()].store(watch, Ordering::Release);
+                let Some(cart) = self.carts[sim_id.to_index()].as_mut() else {
+                    return;
+                };
+                if watch {
+                    cart.restart_watching();
+                } else {
+                    cart.stop_watching();
+                }
+            }
             EmulatorCommand::StartSecondSim(path) => {
                 if let Err(error) = self.start_second_sim(path) {
                     self.report_error(
@@ -715,9 +799,8 @@ impl Emulator {
                 };
                 sim.watch_stdout(true);
             }
-            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);
+            EmulatorCommand::SetAudioEnabled(sim_id, enabled) => {
+                self.audio_on[sim_id.to_index()].store(enabled, Ordering::Release);
             }
             EmulatorCommand::Link => {
                 self.link_sims();
@@ -726,9 +809,7 @@ impl Emulator {
                 self.unlink_sims();
             }
             EmulatorCommand::Reset(sim_id) => {
-                if let Err(error) = self.reset_sim(sim_id, None) {
-                    self.report_error(sim_id, format!("Error resetting sim: {error}"));
-                }
+                self.reset_sim(sim_id, None);
             }
             EmulatorCommand::SetKeys(sim_id, keys) => {
                 if let Some(sim) = self.sims.get_mut(sim_id.to_index()) {
@@ -770,6 +851,8 @@ impl Emulator {
 pub enum EmulatorCommand {
     ConnectToSim(SimId, TextureSink, mpsc::Sender<Toast>),
     LoadGame(SimId, PathBuf),
+    ReloadRom(SimId),
+    WatchRom(SimId, bool),
     StartSecondSim(Option<PathBuf>),
     StopSecondSim,
     Pause,
@@ -792,7 +875,7 @@ pub enum EmulatorCommand {
     AddWatchpoint(SimId, u32, usize, VBWatchpointType),
     RemoveWatchpoint(SimId, u32, usize, VBWatchpointType),
     WatchStdout(SimId, mpsc::Sender<String>),
-    SetAudioEnabled(bool, bool),
+    SetAudioEnabled(SimId, bool),
     Link,
     Unlink,
     Reset(SimId),
@@ -858,8 +941,8 @@ pub struct EmulatorClient {
     queue: mpsc::Sender<EmulatorCommand>,
     sim_state: Arc<[Atomic<SimState>; 2]>,
     state: Arc<Atomic<EmulatorState>>,
-    audio_on: Arc<[AtomicBool; 2]>,
     linked: Arc<AtomicBool>,
+    watch_rom: Arc<[AtomicBool; 2]>,
 }
 
 impl EmulatorClient {
@@ -869,12 +952,12 @@ impl EmulatorClient {
     pub fn emulator_state(&self) -> EmulatorState {
         self.state.load(Ordering::Acquire)
     }
-    pub fn is_audio_enabled(&self, sim_id: SimId) -> bool {
-        self.audio_on[sim_id.to_index()].load(Ordering::Acquire)
-    }
     pub fn are_sims_linked(&self) -> bool {
         self.linked.load(Ordering::Acquire)
     }
+    pub fn is_rom_watched(&self, sim_id: SimId) -> bool {
+        self.watch_rom[sim_id.to_index()].load(Ordering::Acquire)
+    }
     pub fn send_command(&self, command: EmulatorCommand) -> bool {
         match self.queue.send(command) {
             Ok(()) => true,

src/emulator/cart.rs

@@ -1,10 +1,11 @@
 use anyhow::Result;
+use notify::Watcher;
 use rand::Rng;
 use std::{
     fs::{self, File},
     io::{Read, Seek as _, SeekFrom, Write as _},
     path::{Path, PathBuf},
-    sync::Arc,
+    sync::{Arc, atomic::AtomicBool},
 };
 
 use crate::emulator::{SimId, game_info::GameInfo, shrooms_vb_util::rom_from_isx};
@@ -15,10 +16,12 @@ pub struct Cart {
     sram_file: File,
     pub sram: Vec<u8>,
     pub info: Arc<GameInfo>,
+    watcher: Option<notify::RecommendedWatcher>,
+    changed: Arc<AtomicBool>,
 }
 
 impl Cart {
-    pub fn load(file_path: &Path, sim_id: SimId) -> Result<Self> {
+    pub fn load(file_path: &Path, sim_id: SimId, watch: bool) -> Result<Self> {
         let rom = fs::read(file_path)?;
         let (rom, info) = try_parse_isx(file_path, &rom)
             .or_else(|| try_parse_elf(file_path, &rom))
@@ -45,12 +48,21 @@ impl Cart {
             sram
         };
 
+        let changed = Arc::new(AtomicBool::new(false));
+        let watcher = if watch {
+            build_watcher(file_path, changed.clone())
+        } else {
+            None
+        };
+
         Ok(Cart {
             file_path: file_path.to_path_buf(),
             rom,
             sram_file,
             sram,
             info: Arc::new(info),
+            watcher,
+            changed,
         })
     }
 
@@ -59,6 +71,50 @@ impl Cart {
         self.sram_file.write_all(&self.sram)?;
         Ok(())
     }
+
+    pub fn changed(&self) -> bool {
+        self.changed.load(std::sync::atomic::Ordering::Relaxed)
+    }
+
+    pub fn is_watching(&self) -> bool {
+        self.watcher.is_some()
+    }
+
+    pub fn restart_watching(&mut self) {
+        self.changed = Arc::new(AtomicBool::new(false));
+        if let Some(mut watcher) = self.watcher.take() {
+            let _ = watcher.unwatch(&self.file_path);
+        };
+        self.watcher = build_watcher(&self.file_path, self.changed.clone());
+    }
+
+    pub fn stop_watching(&mut self) {
+        self.changed = Arc::new(AtomicBool::new(false));
+        self.watcher = None;
+    }
+}
+
+fn build_watcher(file_path: &Path, changed: Arc<AtomicBool>) -> Option<notify::RecommendedWatcher> {
+    let file_path = file_path.to_path_buf();
+    let mut watcher =
+        notify::recommended_watcher(move |event: Result<notify::Event, notify::Error>| {
+            let Ok(e) = event else {
+                return;
+            };
+            let modified = !matches!(
+                e.kind,
+                notify::EventKind::Access(_)
+                    | notify::EventKind::Modify(notify::event::ModifyKind::Metadata(_))
+            );
+            if modified {
+                changed.store(true, std::sync::atomic::Ordering::Relaxed);
+            }
+        })
+        .ok()?;
+    watcher
+        .watch(&file_path, notify::RecursiveMode::NonRecursive)
+        .ok()?;
+    Some(watcher)
 }
 
 fn try_parse_isx(file_path: &Path, data: &[u8]) -> Option<(Vec<u8>, GameInfo)> {

src/input.rs

@@ -457,15 +457,10 @@ struct PersistedGamepadMapping {
     default_axes: Vec<(Code, (VBKey, VBKey))>,
 }
 
-#[derive(Serialize, Deserialize)]
-pub struct Shortcut {
-    pub shortcut: KeyboardShortcut,
-    pub command: Command,
-}
-
 #[derive(Clone, Copy, Serialize, Deserialize, PartialEq, Eq, Hash)]
 pub enum Command {
     OpenRom,
+    ReloadRom,
     Quit,
     FrameAdvance,
     FastForward(u32),
@@ -476,9 +471,10 @@ pub enum Command {
 }
 
 impl Command {
-    pub fn all() -> [Self; 7] {
+    pub fn all() -> [Self; 8] {
         [
             Self::OpenRom,
+            Self::ReloadRom,
             Self::Quit,
             Self::PauseResume,
             Self::Reset,
@@ -491,6 +487,7 @@ impl Command {
     pub fn name(self) -> &'static str {
         match self {
             Self::OpenRom => "Open ROM",
+            Self::ReloadRom => "Reload ROM",
             Self::Quit => "Exit",
             Self::PauseResume => "Pause/Resume",
             Self::Reset => "Reset",
@@ -522,6 +519,10 @@ impl Default for Shortcuts {
             Command::OpenRom,
             KeyboardShortcut::new(Modifiers::COMMAND, Key::O),
         );
+        shortcuts.set(
+            Command::ReloadRom,
+            KeyboardShortcut::new(Modifiers::COMMAND | Modifiers::SHIFT, Key::F5),
+        );
         shortcuts.set(
             Command::Quit,
             KeyboardShortcut::new(Modifiers::COMMAND, Key::Q),

src/main.rs

@@ -1,7 +1,7 @@
 // hide console in release mode
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
-use std::{path::PathBuf, process, time::SystemTime};
+use std::{process, time::SystemTime};
 
 use anyhow::{Result, bail};
 use app::Application;
@@ -12,8 +12,15 @@ use tracing::error;
 use tracing_subscriber::{EnvFilter, Layer, layer::SubscriberExt, util::SubscriberInitExt};
 use winit::event_loop::{ControlFlow, EventLoop};
 
+use crate::{
+    config::{CliArgs, SimConfig},
+    emulator::SimId,
+    persistence::Persistence,
+};
+
 mod app;
 mod audio;
+mod config;
 mod controller;
 mod emulator;
 mod gdbserver;
@@ -25,18 +32,6 @@ mod persistence;
 mod profiler;
 mod window;
 
-#[derive(Parser)]
-struct Args {
-    /// The path to a virtual boy ROM to run.
-    rom: Option<PathBuf>,
-    /// Start a GDB/LLDB debug server on this port.
-    #[arg(short, long)]
-    debug_port: Option<u16>,
-    /// Enable profiling a game
-    #[arg(short, long)]
-    profile: bool,
-}
-
 fn init_logger() {
     let directives = std::env::var("RUST_LOG").unwrap_or("error,lemur=info".into());
     let filter = EnvFilter::builder().parse_lossy(directives);
@@ -98,7 +93,9 @@ fn main() -> Result<()> {
     #[cfg(windows)]
     set_process_priority_to_high()?;
 
-    let args = Args::parse();
+    let args = CliArgs::parse();
+
+    let persistence = Persistence::new();
 
     let (mut builder, client) = EmulatorBuilder::new();
     if let Some(path) = &args.rom {
@@ -113,6 +110,14 @@ fn main() -> Result<()> {
     if args.profile {
         builder = builder.start_paused(true)
     }
+    let p1 = SimConfig::load(&persistence, SimId::Player1);
+    let p2 = SimConfig::load(&persistence, SimId::Player2);
+
+    let watch = args.watch;
+
+    builder = builder
+        .with_audio_on(p1.audio_enabled, p2.audio_enabled)
+        .with_watch_rom(watch, watch);
 
     ThreadBuilder::default()
         .name("Emulator".to_owned())
@@ -131,11 +136,6 @@ fn main() -> Result<()> {
     let event_loop = EventLoop::with_user_event().build().unwrap();
     event_loop.set_control_flow(ControlFlow::Poll);
     let proxy = event_loop.create_proxy();
-    event_loop.run_app(&mut Application::new(
-        client,
-        proxy,
-        args.debug_port,
-        args.profile,
-    ))?;
+    event_loop.run_app(&mut Application::new(client, proxy, persistence, args))?;
     Ok(())
 }

src/memory.rs

@@ -50,11 +50,11 @@ impl MemoryClient {
 }
 
 fn aligned_memory(start: u32, length: usize) -> BoxBytes {
-    if start % 4 == 0 && length % 4 == 0 {
+    if start.is_multiple_of(4) && length.is_multiple_of(4) {
         let memory = vec![0u32; length / 4].into_boxed_slice();
         return bytemuck::box_bytes_of(memory);
     }
-    if start % 2 == 0 && length % 2 == 0 {
+    if start.is_multiple_of(2) && length.is_multiple_of(2) {
         let memory = vec![0u16; length / 2].into_boxed_slice();
         return bytemuck::box_bytes_of(memory);
     }

src/profiler/state.rs

@@ -60,6 +60,11 @@ impl ProgramState {
         let Some(stack) = self.call_stacks.get_mut(code) else {
             bail!("missing stack {code:04x}");
         };
+        // just popping the inline frames first
+        while stack
+            .pop_if(|f| matches!(f, StackFrame::Label(_)))
+            .is_some()
+        {}
         if stack.pop().is_none() {
             bail!("returned from {code:04x} but stack was empty");
         }

src/window.rs

@@ -3,6 +3,7 @@ use std::sync::Arc;
 pub use about::AboutWindow;
 use egui::{Context, ViewportBuilder, ViewportId};
 pub use game::GameWindow;
+pub use game_screen::DisplayMode;
 pub use gdb::GdbServerWindow;
 pub use hotkeys::HotkeysWindow;
 pub use input::InputWindow;

src/window/game.rs

@@ -5,6 +5,7 @@ use std::{
 
 use crate::{
     app::UserEvent,
+    config::{COLOR_PRESETS, SimConfig},
     emulator::{EmulatorClient, EmulatorCommand, EmulatorState, SimId, SimState},
     input::{Command, ShortcutProvider},
     persistence::Persistence,
@@ -16,7 +17,6 @@ use egui::{
     ViewportBuilder, ViewportCommand, ViewportId, Window,
 };
 use egui_notify::{Anchor, Toast, Toasts};
-use serde::{Deserialize, Serialize};
 use winit::event_loop::EventLoopProxy;
 
 use super::{
@@ -25,28 +25,13 @@ use super::{
     utils::UiExt as _,
 };
 
-const COLOR_PRESETS: [[Color32; 2]; 3] = [
-    [
-        Color32::from_rgb(0xff, 0x00, 0x00),
-        Color32::from_rgb(0x00, 0xc6, 0xf0),
-    ],
-    [
-        Color32::from_rgb(0x00, 0xb4, 0x00),
-        Color32::from_rgb(0xc8, 0x00, 0xff),
-    ],
-    [
-        Color32::from_rgb(0xb4, 0x9b, 0x00),
-        Color32::from_rgb(0x00, 0x00, 0xff),
-    ],
-];
-
 pub struct GameWindow {
     client: EmulatorClient,
     proxy: EventLoopProxy<UserEvent>,
     persistence: Persistence,
     shortcuts: ShortcutProvider,
     sim_id: SimId,
-    config: GameConfig,
+    config: SimConfig,
     toasts: Toasts,
     screen: Option<GameScreen>,
     messages: Option<mpsc::Receiver<Toast>>,
@@ -62,7 +47,7 @@ impl GameWindow {
         shortcuts: ShortcutProvider,
         sim_id: SimId,
     ) -> Self {
-        let config = load_config(&persistence, sim_id);
+        let config = SimConfig::load(&persistence, sim_id);
         let toasts = Toasts::new()
             .with_anchor(Anchor::BottomLeft)
             .with_margin((10.0, 10.0).into())
@@ -100,6 +85,10 @@ impl GameWindow {
                             .send_command(EmulatorCommand::LoadGame(self.sim_id, path));
                     }
                 }
+                Command::ReloadRom => {
+                    self.client
+                        .send_command(EmulatorCommand::ReloadRom(self.sim_id));
+                }
                 Command::Quit => {
                     let _ = self.proxy.send_event(UserEvent::Quit(self.sim_id));
                 }
@@ -152,6 +141,18 @@ impl GameWindow {
                         .send_command(EmulatorCommand::LoadGame(self.sim_id, path));
                 }
             }
+            if ui
+                .add(self.button_for(ui.ctx(), "Reload ROM", Command::ReloadRom))
+                .clicked()
+            {
+                self.client
+                    .send_command(EmulatorCommand::ReloadRom(self.sim_id));
+            }
+            let watch_rom = self.client.is_rom_watched(self.sim_id);
+            if ui.selectable_button(watch_rom, "Watch ROM").clicked() {
+                self.client
+                    .send_command(EmulatorCommand::WatchRom(self.sim_id, !watch_rom));
+            }
             if ui
                 .add(self.button_for(ui.ctx(), "Quit", Command::Quit))
                 .clicked()
@@ -410,15 +411,15 @@ impl GameWindow {
             });
         });
         ui.menu_button("Audio", |ui| {
-            let p1_enabled = self.client.is_audio_enabled(SimId::Player1);
-            let p2_enabled = self.client.is_audio_enabled(SimId::Player2);
-            if ui.selectable_button(p1_enabled, "Player 1").clicked() {
-                self.client
-                    .send_command(EmulatorCommand::SetAudioEnabled(!p1_enabled, p2_enabled));
-            }
-            if ui.selectable_button(p2_enabled, "Player 2").clicked() {
-                self.client
-                    .send_command(EmulatorCommand::SetAudioEnabled(p1_enabled, !p2_enabled));
+            if ui
+                .selectable_button(self.config.audio_enabled, "Enabled")
+                .clicked()
+            {
+                self.update_config(|c| c.audio_enabled = !c.audio_enabled);
+                self.client.send_command(EmulatorCommand::SetAudioEnabled(
+                    self.sim_id,
+                    self.config.audio_enabled,
+                ));
             }
         });
         ui.menu_button("Input", |ui| {
@@ -460,13 +461,11 @@ impl GameWindow {
         }
     }
 
-    fn update_config(&mut self, update: impl FnOnce(&mut GameConfig)) {
+    fn update_config(&mut self, update: impl FnOnce(&mut SimConfig)) {
         let mut new_config = self.config.clone();
         update(&mut new_config);
         if self.config != new_config {
-            let _ = self
-                .persistence
-                .save_config(config_filename(self.sim_id), &new_config);
+            let _ = new_config.save(&self.persistence, self.sim_id);
         }
         self.config = new_config;
     }
@@ -480,24 +479,6 @@ impl GameWindow {
     }
 }
 
-fn config_filename(sim_id: SimId) -> &'static str {
-    match sim_id {
-        SimId::Player1 => "config_p1",
-        SimId::Player2 => "config_p2",
-    }
-}
-
-fn load_config(persistence: &Persistence, sim_id: SimId) -> GameConfig {
-    if let Ok(config) = persistence.load_config(config_filename(sim_id)) {
-        return config;
-    }
-    GameConfig {
-        display_mode: DisplayMode::Anaglyph,
-        colors: COLOR_PRESETS[0],
-        dimensions: DisplayMode::Anaglyph.proportions() + Vec2::new(0.0, 22.0),
-    }
-}
-
 impl AppWindow for GameWindow {
     fn viewport_id(&self) -> ViewportId {
         match self.sim_id {
@@ -580,10 +561,3 @@ struct ColorPickerState {
     just_opened: bool,
     unpause_on_close: bool,
 }
-
-#[derive(Serialize, Deserialize, Clone, PartialEq, Eq)]
-struct GameConfig {
-    display_mode: DisplayMode,
-    colors: [Color32; 2],
-    dimensions: Vec2,
-}

src/window/vip/chardata.rs

@@ -274,12 +274,6 @@ impl AppWindow for CharacterDataWindow {
     }
 }
 
-#[derive(Serialize, Deserialize, Clone, PartialEq, Eq, Hash)]
-enum CharDataResource {
-    Character { palette: Palette, index: usize },
-    CharacterData { palette: Palette },
-}
-
 #[derive(Clone, Default, PartialEq, Eq)]
 struct CharDataParams {
     palette: Palette,