src/app.rs

@@ -23,7 +23,7 @@ use crate::{
     vram::VramProcessor,
     window::{
         AboutWindow, AppWindow, BgMapWindow, CharacterDataWindow, FrameBufferWindow, GameWindow,
-        GdbServerWindow, InputWindow, ObjectWindow, WorldWindow,
+        GdbServerWindow, InputWindow, ObjectWindow, RegisterWindow, WorldWindow,
     },
 };
 
@@ -233,6 +233,10 @@ impl ApplicationHandler<UserEvent> for Application {
                 let world = FrameBufferWindow::new(sim_id, &self.memory, &mut self.vram);
                 self.open(event_loop, Box::new(world));
             }
+            UserEvent::OpenRegisters(sim_id) => {
+                let registers = RegisterWindow::new(sim_id, &self.memory);
+                self.open(event_loop, Box::new(registers));
+            }
             UserEvent::OpenDebugger(sim_id) => {
                 let debugger =
                     GdbServerWindow::new(sim_id, self.client.clone(), self.proxy.clone());
@@ -496,6 +500,7 @@ pub enum UserEvent {
     OpenObjects(SimId),
     OpenWorlds(SimId),
     OpenFrameBuffers(SimId),
+    OpenRegisters(SimId),
     OpenDebugger(SimId),
     OpenInput,
     OpenPlayer2,

src/window.rs

@@ -3,7 +3,9 @@ use egui::{Context, ViewportBuilder, ViewportId};
 pub use game::GameWindow;
 pub use gdb::GdbServerWindow;
 pub use input::InputWindow;
-pub use vram::{BgMapWindow, CharacterDataWindow, FrameBufferWindow, ObjectWindow, WorldWindow};
+pub use vram::{
+    BgMapWindow, CharacterDataWindow, FrameBufferWindow, ObjectWindow, RegisterWindow, WorldWindow,
+};
 use winit::event::KeyEvent;
 
 use crate::emulator::SimId;

src/window/game.rs

@@ -162,6 +162,12 @@ impl GameWindow {
                     .unwrap();
                 ui.close_menu();
             }
+            if ui.button("Registers").clicked() {
+                self.proxy
+                    .send_event(UserEvent::OpenRegisters(self.sim_id))
+                    .unwrap();
+                ui.close_menu();
+            }
         });
         ui.menu_button("Help", |ui| {
             if ui.button("About").clicked() {

src/window/vram.rs

@@ -2,6 +2,7 @@ mod bgmap;
 mod chardata;
 mod framebuffer;
 mod object;
+mod registers;
 mod utils;
 mod world;
 
@@ -9,4 +10,5 @@ pub use bgmap::*;
 pub use chardata::*;
 pub use framebuffer::*;
 pub use object::*;
+pub use registers::*;
 pub use world::*;

src/window/vram/registers.rs

@@ -0,0 +1,195 @@
+use std::sync::Arc;
+
+use egui::{
+    Align, CentralPanel, Context, Label, Layout, ScrollArea, TextEdit, Ui, ViewportBuilder,
+    ViewportId,
+};
+use egui_extras::{Column, Size, StripBuilder, TableBuilder};
+
+use crate::{
+    emulator::SimId,
+    memory::{MemoryClient, MemoryView},
+    window::{utils::UiExt, AppWindow},
+};
+
+pub struct RegisterWindow {
+    sim_id: SimId,
+    memory: Arc<MemoryClient>,
+    registers: MemoryView,
+}
+
+impl RegisterWindow {
+    pub fn new(sim_id: SimId, memory: &Arc<MemoryClient>) -> Self {
+        Self {
+            sim_id,
+            memory: memory.clone(),
+            registers: memory.watch(sim_id, 0x0005f800, 0x70),
+        }
+    }
+
+    fn show_interrupts(&mut self, ui: &mut Ui) {
+        let row_height = ui.spacing().interact_size.y;
+        let registers = self.registers.borrow();
+        let [mut raw_intpnd, mut raw_intenb] = registers.read::<[u16; 2]>(0);
+        let mut intenb = InterruptReg::parse(raw_intenb);
+        let mut intpnd = InterruptReg::parse(raw_intpnd);
+        ui.section("Interrupt", |ui| {
+            ui.vertical(|ui| {
+                TableBuilder::new(ui)
+                    .id_salt("raw_values")
+                    .column(Column::auto())
+                    .column(Column::remainder())
+                    .cell_layout(Layout::left_to_right(Align::Max))
+                    .body(|mut body| {
+                        body.row(row_height, |mut row| {
+                            row.col(|ui| {
+                                ui.label("INTENB");
+                            });
+                            row.col(|ui| {
+                                let mut text = format!("{raw_intenb:04x}");
+                                ui.add_enabled(
+                                    false,
+                                    TextEdit::singleline(&mut text).horizontal_align(Align::Max),
+                                );
+                            });
+                        });
+                        body.row(row_height, |mut row| {
+                            row.col(|ui| {
+                                ui.label("INTPND");
+                            });
+                            row.col(|ui| {
+                                let mut text = format!("{raw_intpnd:04x}");
+                                ui.add_enabled(
+                                    false,
+                                    TextEdit::singleline(&mut text).horizontal_align(Align::Max),
+                                );
+                            });
+                        });
+                    });
+                ui.add_space(8.0);
+                TableBuilder::new(ui)
+                    .id_salt("flags")
+                    .column(Column::auto())
+                    .columns(Column::remainder(), 2)
+                    .cell_layout(Layout::left_to_right(Align::Center).with_main_align(Align::RIGHT))
+                    .body(|mut body| {
+                        body.row(row_height, |mut row| {
+                            row.col(|_ui| {});
+                            row.col(|ui| {
+                                ui.add_sized([ui.available_width(), 0.0], Label::new("ENB"));
+                            });
+                            row.col(|ui| {
+                                ui.add_sized([ui.available_width(), 0.0], Label::new("PND"));
+                            });
+                        });
+                        let mut add_row = |label: &str, enb: &mut bool, pnd: &mut bool| {
+                            body.row(row_height, |mut row| {
+                                row.col(|ui| {
+                                    ui.label(label);
+                                });
+                                row.col(|ui| {
+                                    let space =
+                                        (ui.available_width() - ui.spacing().icon_width) / 2.0;
+                                    ui.add_space(space);
+                                    ui.checkbox(enb, "");
+                                });
+                                row.col(|ui| {
+                                    let space =
+                                        (ui.available_width() - ui.spacing().icon_width) / 2.0;
+                                    ui.add_space(space);
+                                    ui.checkbox(pnd, "");
+                                });
+                            });
+                        };
+                        add_row("TIMEERR", &mut intenb.timeerr, &mut intpnd.timeerr);
+                        add_row("XPEND", &mut intenb.xpend, &mut intpnd.xpend);
+                        add_row("SBHIT", &mut intenb.sbhit, &mut intpnd.sbhit);
+                        add_row("FRAMESTART", &mut intenb.framestart, &mut intpnd.framestart);
+                        add_row("GAMESTART", &mut intenb.gamestart, &mut intpnd.gamestart);
+                        add_row("RFBEND", &mut intenb.rfbend, &mut intpnd.rfbend);
+                        add_row("LFBEND", &mut intenb.lfbend, &mut intpnd.lfbend);
+                        add_row("SCANERR", &mut intenb.scanerr, &mut intpnd.scanerr);
+                    });
+            });
+        });
+        if intpnd.update(&mut raw_intpnd) {
+            self.memory.write(self.sim_id, 0x0005f800, &raw_intpnd);
+        }
+        if intenb.update(&mut raw_intenb) {
+            self.memory.write(self.sim_id, 0x0005f802, &raw_intenb);
+        }
+    }
+}
+
+impl AppWindow for RegisterWindow {
+    fn viewport_id(&self) -> ViewportId {
+        ViewportId::from_hash_of(format!("registers-{}", self.sim_id))
+    }
+
+    fn sim_id(&self) -> SimId {
+        self.sim_id
+    }
+
+    fn initial_viewport(&self) -> ViewportBuilder {
+        ViewportBuilder::default()
+            .with_title(format!("Registers ({})", self.sim_id))
+            .with_inner_size((640.0, 480.0))
+    }
+
+    fn show(&mut self, ctx: &Context) {
+        CentralPanel::default().show(ctx, |ui| {
+            ScrollArea::vertical().show(ui, |ui| {
+                ui.horizontal_top(|ui| {
+                    StripBuilder::new(ui)
+                        .sizes(Size::remainder(), 4)
+                        .horizontal(|mut strip| {
+                            strip.cell(|ui| {
+                                self.show_interrupts(ui);
+                            })
+                        });
+                });
+            });
+        });
+    }
+}
+
+struct InterruptReg {
+    timeerr: bool,
+    xpend: bool,
+    sbhit: bool,
+    framestart: bool,
+    gamestart: bool,
+    rfbend: bool,
+    lfbend: bool,
+    scanerr: bool,
+}
+
+impl InterruptReg {
+    fn parse(value: u16) -> Self {
+        Self {
+            timeerr: value & 0x8000 != 0,
+            xpend: value & 0x4000 != 0,
+            sbhit: value & 0x2000 != 0,
+            framestart: value & 0x0010 != 0,
+            gamestart: value & 0x0008 != 0,
+            rfbend: value & 0x0004 != 0,
+            lfbend: value & 0x0002 != 0,
+            scanerr: value & 0x0001 != 0,
+        }
+    }
+
+    fn update(&self, value: &mut u16) -> bool {
+        let new_value = (*value & 0x1fe0)
+            | if self.timeerr { 0x8000 } else { 0x0000 }
+            | if self.xpend { 0x4000 } else { 0x0000 }
+            | if self.sbhit { 0x2000 } else { 0x0000 }
+            | if self.framestart { 0x0010 } else { 0x0000 }
+            | if self.gamestart { 0x0008 } else { 0x0000 }
+            | if self.rfbend { 0x0004 } else { 0x0000 }
+            | if self.lfbend { 0x0002 } else { 0x0000 }
+            | if self.scanerr { 0x0001 } else { 0x0000 };
+        let changed = *value != new_value;
+        *value = new_value;
+        changed
+    }
+}