added support for local editing with different editor

conn/src/lib.rs

@@ -12,7 +12,7 @@ pub struct SimState{
 }
 
 static STATE: SimState = SimState{
-    switch: AtomicU32::new(512),
+    switch: AtomicU32::new(0),
     button: AtomicU32::new(0),
     led: AtomicU32::new(0),
     segs: [const{AtomicU32::new(0)}; 4],

relay/src/build.rs

@@ -1,10 +1,10 @@
 use std::{
-    collections::HashMap,
+    collections::HashMap, ffi::OsStr, ops::Deref, path::{Path, PathBuf}
-    ops::Deref,
-    path::{Path, PathBuf},
 };
 use tokio::process::{Child, Command};
 
+use crate::HResult;
+
 async fn ensure_ok(child: Child) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     let result = child.wait_with_output().await?;
     if !result.status.success() {
@@ -43,9 +43,9 @@ impl AsRef<Path> for TempDir {
     }
 }
 
-pub async fn build(
+pub async fn copy_and_build(
     files: HashMap<String, String>,
-) -> Result<TempDir, Box<dyn std::error::Error + Send + Sync>> {
+) -> HResult<TempDir> {
     use std::hash::*;
     let mut hasher = std::hash::DefaultHasher::default();
     for (key, value) in &files {
@@ -56,7 +56,7 @@ pub async fn build(
 
     let mut work_dir = std::env::temp_dir();
     work_dir.push(format!("ghdl-relay-{hash:x?}"));
-    _ = std::fs::create_dir(&work_dir);
+    std::fs::create_dir_all(&work_dir)?;
     let work_dir = TempDir(work_dir);
 
     for (name, contents) in &files {
@@ -65,36 +65,51 @@ pub async fn build(
         std::fs::write(path, contents)?;
     }
 
-    let mut cmd = Command::new("ghdl");
+    build(&work_dir, &work_dir).await?;
+
+    Ok(work_dir)
+}
+
+
+pub async fn build(path: &Path, src: &Path) -> HResult<()>{
+    std::fs::create_dir_all(path)?;
+
+        let mut cmd = Command::new("ghdl");
     cmd.kill_on_drop(true);
-    cmd.args(["-a", "-g", "--std=08"]);
+    cmd.args(["-i", "-g", "--std=08"]);
-    for name in files.keys() {
+
-        let mut path = work_dir.clone();
+    for file in src.read_dir().unwrap().flatten(){
-        path.push(name);
+        if Path::new(&file.file_name()).extension() == Some(OsStr::new("vhdl")) {
-        cmd.arg(path);
+            cmd.arg(file.path());
+        }
     }
+
     cmd.arg(std::fs::canonicalize("../rtl/tb.vhdl")?);
 
     cmd.stdin(std::process::Stdio::piped())
         .stdout(std::process::Stdio::piped())
         .stderr(std::process::Stdio::piped());
 
-    cmd.current_dir(&work_dir);
+    cmd.current_dir(path);
     ensure_ok(cmd.spawn()?).await?;
 
+
+
+
+
     let mut cmd = Command::new("ghdl");
     cmd.kill_on_drop(true);
-    cmd.args(["-e", "--std=08"]);
+    cmd.args(["-m", "--std=08"]);
     cmd.arg(format!(
         "-Wl,{}",
-        std::fs::canonicalize("../conn/target/release/libvhdl_ui.a")?.display()
+        std::fs::canonicalize("../target/release/libvhdl_ui.a")?.display()
     ));
     cmd.arg("tb");
-    cmd.current_dir(&work_dir);
+    cmd.current_dir(path);
     cmd.stdin(std::process::Stdio::piped())
         .stdout(std::process::Stdio::piped())
         .stderr(std::process::Stdio::piped());
     ensure_ok(cmd.spawn()?).await?;
     
-    Ok(work_dir)
+    Ok(())
 }

relay/src/local.rs

@@ -5,43 +5,15 @@ use futures_util::{
     SinkExt, StreamExt,
     stream::{SplitSink, SplitStream},
 };
-use serde::{Deserialize, Serialize};
+use std::{path::PathBuf, time::Duration};
-use std::{collections::HashMap, path::PathBuf, time::Duration};
 use tokio::{
     io::{AsyncBufReadExt, BufReader, Lines},
-    process::{Child, ChildStderr, ChildStdin, ChildStdout},
+    process::{Child, ChildStderr, ChildStdin, ChildStdout}, time::Instant,
 };
 
-use crate::{build, run};
+use crate::{ClientMsg, ServerMsg, build, run};
 
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(tag = "type", rename_all = "snake_case")]
-enum ClientMsg {
-    Compile(Option<HashMap<String, String>>),
-    Start,
-    Stop,
-    Input {
-        /// bitfield of 32 switches
-        switch: u32,
-        /// bitfield of 32 buttons
-        buttons: u32,
-    },
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(rename_all = "snake_case")]
-enum ServerMsg<'a> {
-    Log { stream: &'a str, line: &'a str },
-    Start,
-    Stop,
-    Led(u32),
-    Seg0(u32),
-    Seg1(u32),
-    Seg2(u32),
-    Seg3(u32),
-}
-
 struct Process {
     process: Child,
 
@@ -50,10 +22,6 @@ struct Process {
     stdin: ChildStdin,
 }
 
-enum Mode {
-    SingleLocal,
-    Remote,
-}
 
 struct Handler {
     sender: SplitSink<WebSocket, Message>,
@@ -68,11 +36,9 @@ struct Handler {
     refresh_time: Duration,
 }
 
-type HResult<T> = Result<T, Box<dyn std::error::Error + Sync + Send>>;
-
 impl Handler {
 
-    async fn local(socket: WebSocket, build: PathBuf, src: PathBuf) -> Self {
+    fn local(socket: WebSocket, build: PathBuf, src: PathBuf) -> Self {
         let (sender, receiver) = socket.split();
         Self {
             sender,
@@ -108,20 +74,18 @@ impl Handler {
         _ = self.sender.send(Message::Text(serde_json::to_string(&ServerMsg::Stop).unwrap_or_default().into())).await;
     }
 
-    async fn handle_websocket_msg(&mut self, msg: ClientMsg) -> HResult<bool> {
+    async fn handle_websocket_msg(&mut self, msg: ClientMsg) {
         match msg{
-            ClientMsg::Compile(_) => todo!(),
             ClientMsg::Start => self.run_program().await,
             ClientMsg::Stop => self.stop_process().await,
             ClientMsg::Input { switch, buttons } => {
                 if let Some(process) = &mut self.process{
                     use tokio::io::AsyncWriteExt;
-                    process.stdin.write_all(format!("btn={}\n", buttons).as_bytes()).await?;
+                    _ = process.stdin.write_all(format!("btn={}\n", buttons).as_bytes()).await;
-                    process.stdin.write_all(format!("sw={}\n", switch).as_bytes()).await?;
+                    _ = process.stdin.write_all(format!("sw={}\n", switch).as_bytes()).await;
                 }
             },
         }
-        Ok(false)
     }
 
     async fn handle_websocket_receive(
@@ -150,13 +114,16 @@ impl Handler {
         }
     }
 
-    async fn run(&mut self) -> Result<(), Box<dyn std::error::Error + Sync + Send>> {
+    async fn run(&mut self) {
         loop {
             if let Some(process) = &mut self.process {
                 if let Ok(Some(_)) = process.process.try_wait(){
                     self.stop_process().await;
                     continue;
                 }
+
+                let mut print_deadline = Instant::now();
+
                 tokio::select! {
                     receive = self.receiver.next() => {
                         if self.handle_websocket_receive(receive).await{
@@ -190,7 +157,7 @@ impl Handler {
                                     self.eprint(line).await;
                                     continue;
                                 };
-                                self.sender.send(Message::Text(serde_json::to_string(&msg)?.into())).await?;
+                                _ = self.sender.send(Message::Text(serde_json::to_string(&msg).unwrap_or_default().into())).await;
                             },
                             Ok(None) => self.stop_process().await,
                             Err(err) => {
@@ -199,8 +166,9 @@ impl Handler {
                             }
                         }
                     }
-                    _ = tokio::time::sleep(self.refresh_time) => {
+                    _ = tokio::time::sleep_until(print_deadline) => {
                         use tokio::io::AsyncWriteExt;
+                        print_deadline += self.refresh_time;
                         _ = process.stdin.write_all("\n".as_bytes()).await;
                     }
                 }
@@ -211,20 +179,12 @@ impl Handler {
                 }
             }
         }
-        Ok(())
     }
 
-    async fn build_program(&mut self) {
+    async fn run_program(&mut self) {        
-        let files = if let Some(Ok(Message::Text(msg))) = self.receiver.next().await
-            && let Ok(files) = serde_json::from_str::<'_, HashMap<String, String>>(&msg)
-        {
-            files
-        } else {
-            return;
-        };
 
-        let artifact_dir = match build::build(files).await {
+        match build::build(&self.build_dir, &self.src_dir).await {
-            Ok(dir) => dir,
+            Ok(_) => {},
             Err(err) => {
                 _ = self
                     .sender
@@ -233,9 +193,7 @@ impl Handler {
                 return;
             }
         };
-    }
 
-    async fn run_program(&mut self) {
         let process = match run::run(&self.build_dir).await {
             Ok(process) => process,
             Err(err) => {
@@ -247,6 +205,7 @@ impl Handler {
         let stderr = BufReader::new(process.stderr).lines();
         let stdin = process.stdin;
 
+        _ = self.sender.send(Message::Text(serde_json::to_string(&ServerMsg::Start).unwrap_or_default().into())).await;
         self.process = Some(
             Process { process: process.child, stderr, stdout, stdin }
         )
@@ -254,5 +213,5 @@ impl Handler {
 }
 
 pub async fn ws_handler(socket: WebSocket) {
-    Handler::local(socket, "target".into(), "src".into());
+    Handler::local(socket, "../target".into(), "../src".into()).run().await;
 }

relay/src/main.rs

@@ -1,21 +1,12 @@
 use axum::{
     Router,
-    extract::ws::{Message, WebSocket, WebSocketUpgrade},
+    extract::ws::WebSocketUpgrade,
     routing::get,
 };
-use futures_util::{
-    stream::{SplitSink, SplitStream},
-};
 use serde::{Deserialize, Serialize};
-use std::{collections::HashMap, net::SocketAddr, path::PathBuf, time::Duration};
+use std::net::SocketAddr;
-use tokio::{
-    io::{BufReader, Lines},
-    process::{Child, ChildStderr, ChildStdin, ChildStdout},
-};
 use tower_http::services::ServeDir;
 
-use crate::build::TempDir;
-
 pub mod build;
 pub mod run;
 pub mod local;
@@ -25,9 +16,13 @@ pub mod remote;
 async fn main() {
     let app = Router::new()
         .route(
-            "/ws",
+            "/ws/local",
             get(|ws: WebSocketUpgrade| async move { ws.on_upgrade(remote::ws_handler) }),
         )
+        .route(
+            "/ws/remote",
+            get(|ws: WebSocketUpgrade| async move { ws.on_upgrade(local::ws_handler) }),
+        )
         .fallback_service(ServeDir::new("ui"));
 
     let addr = SocketAddr::from(([127, 0, 0, 1], 8080));
@@ -39,9 +34,8 @@ async fn main() {
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(tag = "type", rename_all = "snake_case")]
+#[serde(rename_all = "snake_case")]
 pub enum ClientMsg {
-    Compile(Option<HashMap<String, String>>),
     Start,
     Stop,
     Input {
@@ -65,25 +59,4 @@ pub enum ServerMsg<'a> {
     Seg3(u32),
 }
 
-struct Process {
-    process: Child,
-
-    stderr: Lines<BufReader<ChildStderr>>,
-    stdout: Lines<BufReader<ChildStdout>>,
-    stdin: ChildStdin,
-}
-
-struct Handler {
-    sender: SplitSink<WebSocket, Message>,
-    receiver: SplitStream<WebSocket>,
-
-    build_dir: TempDir,
-    src_dir: PathBuf,
-
-    program: Option<PathBuf>,
-    process: Option<Process>,
-
-    refresh_time: Duration,
-}
-
 pub type HResult<T> = Result<T, Box<dyn std::error::Error + Sync + Send>>;

relay/src/remote.rs

@@ -4,9 +4,9 @@ use axum::{
 use futures_util::{
     SinkExt, StreamExt,
 };
-use std::collections::HashMap;
+use std::{collections::HashMap, time::Duration};
 use tokio::{
-    io::{AsyncBufReadExt, BufReader},
+    io::{AsyncBufReadExt, BufReader}, time::Instant,
 };
 
 use crate::{ClientMsg, HResult, ServerMsg, build, run};
@@ -23,7 +23,7 @@ pub async fn ws_handler(socket: WebSocket) {
     };
 
 
-    let artifact_dir = match build::build(files).await{
+    let artifact_dir = match build::copy_and_build(files).await{
         Ok(dir) => dir,
         Err(err) => {
             _ = sender.send(Message::Text(format!("Failed to build: {err}").into())).await;
@@ -43,6 +43,8 @@ pub async fn ws_handler(socket: WebSocket) {
 
     let artifact_prefix = artifact_dir.to_str().unwrap_or("\0\0NOPE");
 
+    let mut print_deadline = Instant::now();
+    
     let result: HResult<()> = async {
         loop{
             tokio::select! {
@@ -52,7 +54,6 @@ pub async fn ws_handler(socket: WebSocket) {
                         Some(Ok(Message::Text(msg))) => {
                             let input = serde_json::from_str::<'_, ClientMsg>(&msg)?;
                             match input{
-                                ClientMsg::Compile(_) => {},
                                 ClientMsg::Start => {},
                                 ClientMsg::Stop => break,
                                 ClientMsg::Input { switch, buttons } => {
@@ -110,8 +111,9 @@ pub async fn ws_handler(socket: WebSocket) {
                         }
                     }
                 }
-                _ = tokio::time::sleep(std::time::Duration::from_millis(30)) => {
+                _ = tokio::time::sleep_until(print_deadline) => {
                     use tokio::io::AsyncWriteExt;
+                    print_deadline += Duration::from_millis(30);
                     process.stdin.write_all("\n".as_bytes()).await?;
                 }
             }        

relay/ui/index.html

@@ -7,50 +7,307 @@
   <link rel="stylesheet" href="styles.css" />
 </head>
 <body>
-  <header class="topbar">
-    <div class="brand">
-      <div class="dot"></div>
-      <div>
-        <div class="title">Circuit Web UI</div>
-        <div class="subtitle">LEDs • HEX • Switches • Buttons • circuit.vhdl</div>
-      </div>
-    </div>
-
-    <div class="controls">
-      <div class="status">
-        <span class="pill" id="wsPill">DISCONNECTED</span>
-        <span class="muted" id="wsUrlText"></span>
-      </div>
-
-      <!-- single toggle button now -->
-      <button id="connectToggleBtn">Connect</button>
-
-      <button id="sendInputsBtn" class="secondary" disabled>Send Inputs</button>
-    </div>
-  </header>
-
   <main class="grid">
-    <!-- Left: Editor -->
+    <section id="editorSection" class="card editor">
-    <section class="card editor">
       <div class="cardHeader">
-        <div class="cardTitle">circuit.vhdl</div>
+        <div class="cardTitle">VHDL</div>
         <div class="cardActions">
           <button id="loadExampleBtn" class="secondary">Load example</button>
         </div>
       </div>
 
-      <!-- NEW: editor with line-number gutter -->
       <div class="editorWrap">
         <pre id="lineGutter" class="lineGutter" aria-hidden="true"></pre>
         <textarea id="vhdlEditor" spellcheck="false"></textarea>
       </div>
+    </section>
 
-      <div class="hint">
+        <section class="card inputs">
-        Saved locally as you type. On <b>Connect</b>, the UI sends <code>{"circuit.vhdl": "..."}</code> as the first WebSocket message.
+      <div class="cardHeader cardHeaderWrap">
+        <div class="cardTitle">Inputs</div>
+
+        <div class="panelTopStatus">
+          <span class="pill state-disabled" id="statusPill">DISABLED</span>
+          <label class="modeToggle" for="modeToggle">
+            <span class="modeLabel">Local</span>
+            <input id="modeToggle" type="checkbox" aria-label="Toggle remote mode" />
+            <span class="modeSlider" aria-hidden="true"></span>
+            <span class="modeLabel">Remote</span>
+          </label>
+          <button id="connectToggleBtn">Connect</button>
+          <button id="runToggleBtn" class="secondary" disabled>Start</button>
+        </div>
+
+      </div>
+
+      <div class="twoCols">
+        <div class="block">
+          <div class="cardActions">
+            <button id="allSwOffBtn" class="secondary">All switches off</button>
+            <button id="allSwOnBtn" class="secondary">All switches on</button>
+          </div>
+          <div class="blockTitle">Switches (32, latched)</div>
+          <div id="switchGrid" class="ioGrid switchGrid">
+            <div class="ioCell">
+              <div class="toggle" data-bit="0" title="Toggle switch 0"></div>
+              <label>SW[0]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="1" title="Toggle switch 1"></div>
+              <label>SW[1]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="2" title="Toggle switch 2"></div>
+              <label>SW[2]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="3" title="Toggle switch 3"></div>
+              <label>SW[3]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="4" title="Toggle switch 4"></div>
+              <label>SW[4]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="5" title="Toggle switch 5"></div>
+              <label>SW[5]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="6" title="Toggle switch 6"></div>
+              <label>SW[6]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="7" title="Toggle switch 7"></div>
+              <label>SW[7]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="8" title="Toggle switch 8"></div>
+              <label>SW[8]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="9" title="Toggle switch 9"></div>
+              <label>SW[9]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="10" title="Toggle switch 10"></div>
+              <label>SW[10]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="11" title="Toggle switch 11"></div>
+              <label>SW[11]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="12" title="Toggle switch 12"></div>
+              <label>SW[12]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="13" title="Toggle switch 13"></div>
+              <label>SW[13]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="14" title="Toggle switch 14"></div>
+              <label>SW[14]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="15" title="Toggle switch 15"></div>
+              <label>SW[15]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="16" title="Toggle switch 16"></div>
+              <label>SW[16]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="17" title="Toggle switch 17"></div>
+              <label>SW[17]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="18" title="Toggle switch 18"></div>
+              <label>SW[18]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="19" title="Toggle switch 19"></div>
+              <label>SW[19]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="20" title="Toggle switch 20"></div>
+              <label>SW[20]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="21" title="Toggle switch 21"></div>
+              <label>SW[21]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="22" title="Toggle switch 22"></div>
+              <label>SW[22]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="23" title="Toggle switch 23"></div>
+              <label>SW[23]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="24" title="Toggle switch 24"></div>
+              <label>SW[24]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="25" title="Toggle switch 25"></div>
+              <label>SW[25]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="26" title="Toggle switch 26"></div>
+              <label>SW[26]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="27" title="Toggle switch 27"></div>
+              <label>SW[27]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="28" title="Toggle switch 28"></div>
+              <label>SW[28]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="29" title="Toggle switch 29"></div>
+              <label>SW[29]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="30" title="Toggle switch 30"></div>
+              <label>SW[30]</label>
+            </div>
+            <div class="ioCell">
+              <div class="toggle" data-bit="31" title="Toggle switch 31"></div>
+              <label>SW[31]</label>
+            </div>
+          </div>
+        </div>
+
+        <div class="block">
+          <div class="blockTitle">Buttons (32, momentary)</div>
+
+          <div class="subBlockTitle">Standard BTN (0-7, 16-31)</div>
+          <div id="buttonGrid" class="ioGrid buttonGrid">
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="0" title="Momentary BTN 0"></button>
+              <label>BTN[0]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="1" title="Momentary BTN 1"></button>
+              <label>BTN[1]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="2" title="Momentary BTN 2"></button>
+              <label>BTN[2]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="3" title="Momentary BTN 3"></button>
+              <label>BTN[3]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="4" title="Momentary BTN 4"></button>
+              <label>BTN[4]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="5" title="Momentary BTN 5"></button>
+              <label>BTN[5]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="6" title="Momentary BTN 6"></button>
+              <label>BTN[6]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="7" title="Momentary BTN 7"></button>
+              <label>BTN[7]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="16" title="Momentary BTN 16"></button>
+              <label>BTN[16]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="17" title="Momentary BTN 17"></button>
+              <label>BTN[17]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="18" title="Momentary BTN 18"></button>
+              <label>BTN[18]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="19" title="Momentary BTN 19"></button>
+              <label>BTN[19]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="20" title="Momentary BTN 20"></button>
+              <label>BTN[20]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="21" title="Momentary BTN 21"></button>
+              <label>BTN[21]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="22" title="Momentary BTN 22"></button>
+              <label>BTN[22]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="23" title="Momentary BTN 23"></button>
+              <label>BTN[23]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="24" title="Momentary BTN 24"></button>
+              <label>BTN[24]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="25" title="Momentary BTN 25"></button>
+              <label>BTN[25]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="26" title="Momentary BTN 26"></button>
+              <label>BTN[26]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="27" title="Momentary BTN 27"></button>
+              <label>BTN[27]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="28" title="Momentary BTN 28"></button>
+              <label>BTN[28]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="29" title="Momentary BTN 29"></button>
+              <label>BTN[29]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="30" title="Momentary BTN 30"></button>
+              <label>BTN[30]</label>
+            </div>
+            <div class="ioCell">
+              <button class="momentary" type="button" data-bit="31" title="Momentary BTN 31"></button>
+              <label>BTN[31]</label>
+            </div>
+          </div>
+
+          <div class="subBlockTitle">4x4 Keypad Matrix via BTN (8-15)</div>
+          <div id="keypadGrid" class="keypadGrid">
+            <button class="momentary keypadBtn" type="button" data-row-bit="8" data-col-bit="12" data-key="7">7</button>
+            <button class="momentary keypadBtn" type="button" data-row-bit="8" data-col-bit="13" data-key="8">8</button>
+            <button class="momentary keypadBtn" type="button" data-row-bit="8" data-col-bit="14" data-key="9">9</button>
+            <button class="momentary keypadBtn op" type="button" data-row-bit="8" data-col-bit="15" data-key="/">/</button>
+
+            <button class="momentary keypadBtn" type="button" data-row-bit="9" data-col-bit="12" data-key="4">4</button>
+            <button class="momentary keypadBtn" type="button" data-row-bit="9" data-col-bit="13" data-key="5">5</button>
+            <button class="momentary keypadBtn" type="button" data-row-bit="9" data-col-bit="14" data-key="6">6</button>
+            <button class="momentary keypadBtn op" type="button" data-row-bit="9" data-col-bit="15" data-key="*">*</button>
+
+            <button class="momentary keypadBtn" type="button" data-row-bit="10" data-col-bit="12" data-key="1">1</button>
+            <button class="momentary keypadBtn" type="button" data-row-bit="10" data-col-bit="13" data-key="2">2</button>
+            <button class="momentary keypadBtn" type="button" data-row-bit="10" data-col-bit="14" data-key="3">3</button>
+            <button class="momentary keypadBtn op" type="button" data-row-bit="10" data-col-bit="15" data-key="-">-</button>
+
+            <button class="momentary keypadBtn" type="button" data-row-bit="11" data-col-bit="12" data-key="0">0</button>
+            <button class="momentary keypadBtn" type="button" data-row-bit="11" data-col-bit="13" data-key=".">.</button>
+            <button class="momentary keypadBtn op" type="button" data-row-bit="11" data-col-bit="14" data-key="=">=</button>
+            <button class="momentary keypadBtn op" type="button" data-row-bit="11" data-col-bit="15" data-key="+">+</button>
+          </div>
+        </div>
       </div>
     </section>
 
-    <!-- Right: IO -->
     <section class="card io">
       <div class="cardHeader">
         <div class="cardTitle">Outputs</div>
@@ -58,55 +315,480 @@
 
       <div class="outputs">
         <div class="block">
-          <div class="blockTitle">LEDs (32)</div>
+          <div id="ledRow" class="ledRow">
-          <div id="ledRow" class="ledRow"></div>
+            <div class="ledGroup">
-          <div class="bitLabelRow" id="ledLabels"></div>
+              <div class="led" data-bit="0" title="LED[0]"></div>
+              <div class="led" data-bit="1" title="LED[1]"></div>
+              <div class="led" data-bit="2" title="LED[2]"></div>
+              <div class="led" data-bit="3" title="LED[3]"></div>
+              <div class="led" data-bit="4" title="LED[4]"></div>
+              <div class="led" data-bit="5" title="LED[5]"></div>
+              <div class="led" data-bit="6" title="LED[6]"></div>
+              <div class="led" data-bit="7" title="LED[7]"></div>
+            </div>
+            <div class="ledGroup">
+              <div class="led" data-bit="8" title="LED[8]"></div>
+              <div class="led" data-bit="9" title="LED[9]"></div>
+              <div class="led" data-bit="10" title="LED[10]"></div>
+              <div class="led" data-bit="11" title="LED[11]"></div>
+              <div class="led" data-bit="12" title="LED[12]"></div>
+              <div class="led" data-bit="13" title="LED[13]"></div>
+              <div class="led" data-bit="14" title="LED[14]"></div>
+              <div class="led" data-bit="15" title="LED[15]"></div>
+            </div>
+            <div class="ledGroup">
+              <div class="led" data-bit="16" title="LED[16]"></div>
+              <div class="led" data-bit="17" title="LED[17]"></div>
+              <div class="led" data-bit="18" title="LED[18]"></div>
+              <div class="led" data-bit="19" title="LED[19]"></div>
+              <div class="led" data-bit="20" title="LED[20]"></div>
+              <div class="led" data-bit="21" title="LED[21]"></div>
+              <div class="led" data-bit="22" title="LED[22]"></div>
+              <div class="led" data-bit="23" title="LED[23]"></div>
+            </div>
+            <div class="ledGroup">
+              <div class="led" data-bit="24" title="LED[24]"></div>
+              <div class="led" data-bit="25" title="LED[25]"></div>
+              <div class="led" data-bit="26" title="LED[26]"></div>
+              <div class="led" data-bit="27" title="LED[27]"></div>
+              <div class="led" data-bit="28" title="LED[28]"></div>
+              <div class="led" data-bit="29" title="LED[29]"></div>
+              <div class="led" data-bit="30" title="LED[30]"></div>
+              <div class="led" data-bit="31" title="LED[31]"></div>
+            </div>
+          </div>
         </div>
 
         <div class="block">
-          <div class="blockTitle">HEX (4 digits, 7-seg + dp)</div>
+          <div id="hexRow" class="hexRow">
-          <div id="hexRow" class="hexRow"></div>
+            <div class="hexGroup">
-          <div class="hint small">
+            <div class="hexDigitWrap">
-            Assumes each digit is 8 bits: <code>bit0=a</code>, <code>1=b</code>, <code>2=c</code>, <code>3=d</code>, <code>4=e</code>, <code>5=f</code>, <code>6=g</code>, <code>7=dp</code>.
+              <div class="sevenSeg" data-digit="0">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[0]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="1">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[1]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="2">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[2]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="3">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[3]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="4">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[4]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="5">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[5]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="6">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[6]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="7">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[7]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="8">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[8]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="9">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[9]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="10">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[10]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="11">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[11]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="12">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[12]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="13">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[13]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="14">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[14]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="15">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[15]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="16">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[16]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="17">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[17]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="18">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[18]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="19">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[19]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="20">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[20]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="21">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[21]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="22">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[22]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="23">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[23]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="24">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[24]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="25">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[25]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="26">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[26]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="27">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[27]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="28">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[28]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="29">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[29]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="30">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[30]</div>
+            </div>
+            <div class="hexDigitWrap">
+              <div class="sevenSeg" data-digit="31">
+                <div class="seg a" data-seg="a"></div>
+                <div class="seg b" data-seg="b"></div>
+                <div class="seg c" data-seg="c"></div>
+                <div class="seg d" data-seg="d"></div>
+                <div class="seg e" data-seg="e"></div>
+                <div class="seg f" data-seg="f"></div>
+                <div class="seg g" data-seg="g"></div>
+                <div class="seg dp" data-seg="dp"></div>
+              </div>
+              <div class="digitLabel">SEG[31]</div>
+            </div>
+            </div>
           </div>
         </div>
       </div>
     </section>
 
-    <!-- Bottom-left: Inputs -->
-    <section class="card inputs">
-      <div class="cardHeader">
-        <div class="cardTitle">Inputs</div>
-        <div class="cardActions">
-          <button id="allSwOffBtn" class="secondary">All switches off</button>
-          <button id="allSwOnBtn" class="secondary">All switches on</button>
-        </div>
-      </div>
-
-      <div class="twoCols">
-        <div class="block">
-          <div class="blockTitle">Switches (32, latched)</div>
-          <div id="switchGrid" class="ioGrid"></div>
-        </div>
-
-        <div class="block">
-          <div class="blockTitle">Buttons (32, momentary)</div>
-          <div id="buttonGrid" class="ioGrid"></div>
-        </div>
-      </div>
-
-      <div class="hint">
-        Switches toggle a bit. Buttons set the bit while pressed (mouse/touch) and clear on release.
-      </div>
-    </section>
-
-    <!-- Bottom-right: Logs -->
     <section class="card logs">
       <div class="cardHeader">
         <div class="cardTitle">Logs</div>
         <div class="cardActions">
           <button id="clearLogBtn" class="secondary">Clear</button>
-          <button id="autoscrollBtn" class="secondary">Autoscroll: on</button>
         </div>
       </div>
 
@@ -114,6 +796,13 @@
     </section>
   </main>
 
+  <script>
+    // Optional runtime config hook:
+    // window.VHDL_UI_CONFIG = {
+    //   mode: "local" | "remote",
+    //   externalFiles: { "circuit.vhdl": "..." }
+    // };
+  </script>
   <script src="app.js"></script>
 </body>
 </html>

relay/ui/styles.css

@@ -1,396 +1,583 @@
-:root{
+:root {
-  --bg: #0b0f17;
+  --bg: #1e1e1e;
-  --card: #121a2a;
+  --surface: #252526;
-  --card2:#0f1726;
+  --surface-muted: #2a2a2b;
-  --text: #e6eefc;
+  --surface-header: #2d2d30;
-  --muted:#9fb0d0;
+  --surface-soft: #1f1f20;
-  --accent:#58a6ff;
+  --surface-soft-2: #2a2a2b;
-  --ok:#22c55e;
+
-  --bad:#ef4444;
+  --text: #d4d4d4;
-  --warn:#f59e0b;
+  --text-muted: #a9adb3;
-  --line:#1f2a44;
+
-  --shadow: 0 12px 30px rgba(0,0,0,.35);
+  --accent: #0e639c;
+  --accent-soft: #1177bb;
+  --accent-muted: #264f78;
+  --ok: #22c55e;
+  --bad: #ef4444;
+  --warn: #f59e0b;
+
+  --border-strong: #4d4d4d;
+  --border: #3c3c3c;
+  --border-soft: #343436;
+
+  --button-primary-bg: #0e639c;
+  --button-primary-bg-hover: #1177bb;
+  --button-secondary-bg: #33363a;
+  --button-secondary-bg-hover: #3f4349;
+  --button-border: #2f5f8f;
+
+  --pill-bg: #323234;
+  --pill-border: #5e6166;
+  --pill-connected-bg: #1f2c23;
+  --pill-connected-border: #407a4d;
+  --pill-disconnected-bg: #342325;
+  --pill-disconnected-border: #8d4f56;
+
+  --led-off-bg: #303033;
+  --led-off-border: #5b5d62;
+  --led-on-bg: #2a9d58;
+  --led-on-border: #5ccd88;
+  --led-group-bg: #242427;
+  --led-group-border: #4f5258;
+
+  --seg-off-bg: #3a3b3f;
+  --seg-on-bg: #f59e0b;
+
+  --toggle-off-bg: #3a3d41;
+  --toggle-off-knob: #c4c7cc;
+  --toggle-on-bg: #2f7d4d;
+  --toggle-on-knob: #7be8a5;
+
+  --momentary-bg: #373a3e;
+  --momentary-border: #60646b;
+  --momentary-down-bg: #365a7f;
+  --momentary-down-border: #5f8fc0;
+  --keypad-op-bg: #44484f;
+  --transparent: transparent;
+  --card-shadow: 0 10px 18px rgba(0, 0, 0, 0.35);
+
   --radius: 14px;
+  --radius-sm: 10px;
   --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
-  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
+  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
 }
 
-*{ box-sizing:border-box; }
+* {
-html,body{ height:100%; }
+  box-sizing: border-box;
-body{
+}
-  margin:0;
+
-  background: radial-gradient(1000px 600px at 20% -10%, rgba(88,166,255,.20), transparent 60%),
+html,
-              radial-gradient(900px 500px at 90% 0%, rgba(34,197,94,.12), transparent 60%),
+body {
-              var(--bg);
+  height: 100%;
-  color:var(--text);
+}
+
+body {
+  margin: 0;
+  background: var(--bg);
+  color: var(--text);
   font-family: var(--sans);
 }
 
-.topbar{
+button {
-  position: sticky;
+  padding: 8px 12px;
-  top:0;
+  border: 1px solid var(--button-border);
-  z-index: 10;
+  border-radius: var(--radius-sm);
-  display:flex;
+  background: var(--button-primary-bg);
-  justify-content:space-between;
+  color: var(--text);
-  align-items:center;
+  cursor: pointer;
-  padding:14px 16px;
+  transition: background 0.15s ease, transform 0.05s ease;
-  border-bottom:1px solid rgba(255,255,255,.06);
-  background: rgba(11,15,23,.8);
-  backdrop-filter: blur(10px);
 }
 
-.brand{
+button:hover {
-  display:flex;
+  background: var(--button-primary-bg-hover);
-  gap:12px;
-  align-items:center;
-}
-.brand .dot{
-  width:12px;height:12px;border-radius:50%;
-  background: var(--accent);
-  box-shadow: 0 0 18px rgba(88,166,255,.7);
-}
-.title{ font-weight:700; letter-spacing:.2px; }
-.subtitle{ font-size:12px; color:var(--muted); margin-top:2px; }
-
-.controls{
-  display:flex;
-  gap:10px;
-  align-items:center;
-}
-.status{
-  display:flex;
-  gap:8px;
-  align-items:center;
-  margin-right:6px;
-}
-.pill{
-  font-size:12px;
-  padding:6px 10px;
-  border-radius:999px;
-  border:1px solid rgba(255,255,255,.12);
-  background: rgba(255,255,255,.04);
-}
-.muted{ color:var(--muted); font-size:12px; }
-
-button{
-  border:1px solid rgba(255,255,255,.14);
-  background: rgba(88,166,255,.14);
-  color:var(--text);
-  padding:8px 12px;
-  border-radius:10px;
-  cursor:pointer;
-  transition: transform .05s ease, background .2s ease;
-}
-button:hover{ background: rgba(88,166,255,.20); }
-button:active{ transform: translateY(1px); }
-button.secondary{
-  background: rgba(255,255,255,.06);
-}
-button.secondary:hover{ background: rgba(255,255,255,.10); }
-button:disabled{
-  opacity:.55;
-  cursor:not-allowed;
 }
 
-.grid{
+button:active {
-  display:grid;
+  transform: translateY(1px);
-  grid-template-columns: 1.2fr 1fr;
-  grid-template-rows: 420px 1fr;
-  gap:14px;
-  padding:14px;
 }
 
-.card{
+button.secondary {
-  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.03));
+  background: var(--button-secondary-bg);
-  border:1px solid rgba(255,255,255,.08);
-  border-radius: var(--radius);
-  box-shadow: var(--shadow);
-  overflow:hidden;
-  min-height: 0;
 }
 
-.cardHeader{
+button.secondary:hover {
-  display:flex;
+  background: var(--button-secondary-bg-hover);
-  justify-content:space-between;
-  align-items:center;
-  padding:12px 12px;
-  border-bottom:1px solid rgba(255,255,255,.06);
-  background: rgba(0,0,0,.15);
 }
-.cardTitle{ font-weight:700; }
-.cardActions{ display:flex; gap:8px; }
 
-.editor{
+button:focus-visible {
-  display:flex;
+  outline: 1px solid var(--accent-soft);
-  flex-direction:column;
+  outline-offset: 1px;
 }
-textarea{
+
-  width:100%;
+button:disabled {
-  height:100%;
+  opacity: 0.6;
-  padding:12px;
+  cursor: not-allowed;
-  background: rgba(0,0,0,.22);
+}
-  color:var(--text);
+
-  border:0;
+textarea {
-  outline:none;
+  width: 100%;
-  resize:none;
+  height: 100%;
+  padding: 12px;
+  border: 0;
+  outline: none;
+  resize: none;
+  color: var(--text);
+  background: var(--surface-soft);
   font-family: var(--mono);
   font-size: 13px;
   line-height: 1.35;
 }
-.hint{
-  padding:10px 12px;
-  border-top:1px solid rgba(255,255,255,.06);
-  color:var(--muted);
-  font-size:12px;
-  background: rgba(0,0,0,.12);
-}
-.hint.small{ font-size:11px; }
 
-.io .outputs{
+.muted {
-  padding:12px;
+  font-size: 12px;
-  display:flex;
+  color: var(--text-muted);
-  flex-direction:column;
-  gap:14px;
-}
-.blockTitle{
-  font-size:12px;
-  color:var(--muted);
-  margin-bottom:8px;
 }
 
-.ledRow{
+.is-hidden {
-  display:grid;
+  display: none !important;
-  grid-template-columns: repeat(16, 1fr);
-  gap:6px;
 }
-.led{
+
+.grid {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: stretch;
+  gap: 14px;
+  padding: 14px;
+}
+
+.card {
+  flex: 1 1 520px;
+  min-height: 0;
+  overflow: hidden;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--surface);
+  box-shadow: var(--card-shadow);
+}
+
+.cardHeader {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 10px;
+  padding: 12px;
+  border-bottom: 1px solid var(--border-soft);
+  background: var(--surface-header);
+}
+
+.cardHeaderWrap {
+  flex-wrap: wrap;
+}
+
+.cardTitle {
+  font-weight: 700;
+}
+
+.cardActions {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+  flex-wrap: wrap;
+}
+
+.panelTopStatus {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-left: auto;
+  flex-wrap: nowrap;
+  white-space: nowrap;
+  min-width: 0;
+  flex: 0 0 auto;
+}
+
+.pill {
+  display: inline-flex;
+  justify-content: center;
+  align-items: center;
+  padding: 6px 10px;
+  font-size: 12px;
+  border: 1px solid var(--pill-border);
+  border-radius: 999px;
+  background: var(--pill-bg);
+  min-width: 104px;
+}
+
+.pill.state-disabled {
+  border-color: var(--pill-disconnected-border);
+  background: var(--pill-disconnected-bg);
+}
+
+.pill.state-connected {
+  border-color: color-mix(in srgb, var(--accent-soft) 75%, white 25%);
+  background: color-mix(in srgb, var(--accent-muted) 72%, black 28%);
+}
+
+.pill.state-running {
+  border-color: var(--pill-connected-border);
+  background: var(--pill-connected-bg);
+  box-shadow: 0 0 0 1px color-mix(in srgb, var(--ok) 40%, transparent);
+}
+
+.modeToggle {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 11px;
+  color: var(--text-muted);
+  user-select: none;
+  flex: 0 0 auto;
+}
+
+.modeToggle input {
+  position: absolute;
+  opacity: 0;
+  pointer-events: none;
+}
+
+.modeSlider {
+  width: 36px;
+  height: 18px;
+  border: 1px solid var(--border-strong);
+  border-radius: 999px;
+  background: var(--toggle-off-bg);
+  position: relative;
+}
+
+.modeSlider::after {
+  content: "";
+  position: absolute;
+  top: 1px;
+  left: 1px;
+  width: 14px;
+  height: 14px;
+  border-radius: 999px;
+  background: var(--toggle-off-knob);
+  transition: transform 0.12s ease, background 0.12s ease;
+}
+
+.modeToggle input:checked + .modeSlider {
+  background: var(--accent-muted);
+}
+
+.modeToggle input:checked + .modeSlider::after {
+  transform: translateX(17px);
+  background: var(--accent-soft);
+}
+
+.blockTitle {
+  margin-bottom: 8px;
+  font-size: 12px;
+  color: var(--text-muted);
+}
+
+.subBlockTitle {
+  margin: 10px 0 8px;
+  font-size: 11px;
+  color: var(--text-muted);
+}
+
+.hint {
+  padding: 10px 12px;
+  border-top: 1px solid var(--border-soft);
+  color: var(--text-muted);
+  font-size: 12px;
+  background: var(--surface-soft-2);
+}
+
+.editor {
+  display: flex;
+  flex-direction: column;
+  min-height: 420px;
+  flex: 1.4 1 620px;
+}
+
+.editorWrap {
+  display: flex;
   width: 100%;
-  aspect-ratio: 1/1;
+  height: 100%;
-  border-radius: 999px;
+  min-height: 0;
-  border:1px solid rgba(255,255,255,.14);
+  background: var(--surface-soft);
-  background: rgba(255,255,255,.08);
-  box-shadow: inset 0 0 0 2px rgba(0,0,0,.18);
 }
-.led.on{
+
-  background: rgba(34,197,94,.70);
+.lineGutter {
-  border-color: rgba(34,197,94,.9);
+  width: 54px;
-  box-shadow: 0 0 14px rgba(34,197,94,.45);
+  margin: 0;
-}
+  padding: 12px 10px 12px 12px;
-.bitLabelRow{
+  overflow: hidden;
-  display:grid;
+  user-select: none;
-  grid-template-columns: repeat(16, 1fr);
+  text-align: right;
-  gap:6px;
+  border-right: 1px solid var(--border-soft);
-  margin-top:6px;
+  color: var(--text-muted);
-  color: var(--muted);
+  background: var(--surface-soft-2);
-  font-size: 10px;
   font-family: var(--mono);
-  opacity: .85;
+  font-size: 13px;
-}
+  line-height: 1.35;
-.bitLabelRow span{
-  text-align:center;
 }
 
-.hexRow{
+textarea#vhdlEditor {
-  display:flex;
+  flex: 1;
-  gap:14px;
+  overflow: auto;
-  flex-wrap:wrap;
+  overscroll-behavior-y: none;
-  align-items:center;
+  background: var(--transparent);
 }
 
-/* 7-seg display */
+.io .outputs {
-.sevenSeg{
+  display: flex;
-  width: 90px;
+  flex-direction: column;
-  height: 140px;
+  gap: 14px;
-  position: relative;
+  padding: 12px;
-  background: rgba(0,0,0,.18);
-  border:1px solid rgba(255,255,255,.10);
-  border-radius: 14px;
-  padding:10px;
 }
-.seg{
+
-  position:absolute;
+.ledRow {
-  background: rgba(255,255,255,.10);
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 10px;
+}
+
+.ledGroup {
+  display: grid;
+  grid-template-columns: repeat(8, minmax(0, 1fr));
+  gap: 6px;
+  padding: 8px;
+  border: 1px solid var(--led-group-border);
   border-radius: 8px;
-  filter: drop-shadow(0 0 0 rgba(0,0,0,0));
+  background: var(--led-group-bg);
-}
-.seg.on{
-  background: rgba(88,166,255,.75);
-  filter: drop-shadow(0 0 8px rgba(88,166,255,.35));
 }
 
-/* segment positions */
+.led {
-.seg.a{ top:10px; left:18px; width:54px; height:12px; }
-.seg.d{ bottom:10px; left:18px; width:54px; height:12px; }
-.seg.g{ top:64px; left:18px; width:54px; height:12px; }
-
-.seg.f{ top:18px; left:10px; width:12px; height:54px; }
-.seg.b{ top:18px; right:10px; width:12px; height:54px; }
-
-.seg.e{ bottom:18px; left:10px; width:12px; height:54px; }
-.seg.c{ bottom:18px; right:10px; width:12px; height:54px; }
-
-.seg.dp{
-  width:12px; height:12px;
-  bottom:10px; right:10px;
-  border-radius: 999px;
-}
-
-.digitLabel{
-  margin-top:8px;
-  font-family: var(--mono);
-  font-size: 11px;
-  color: var(--muted);
-  text-align:center;
-}
-
-.inputs{
-  grid-column: 1 / 2;
-  display:flex;
-  flex-direction:column;
-  min-height: 0;
-}
-.twoCols{
-  padding:12px;
-  display:grid;
-  grid-template-columns: 1fr 1fr;
-  gap:12px;
-  min-height: 0;
-}
-.ioGrid{
-  display:grid;
-  grid-template-columns: repeat(8, 1fr);
-  gap:8px;
-}
-.ioCell{
-  display:flex;
-  flex-direction:column;
-  gap:6px;
-  align-items:center;
-  padding:8px 6px;
-  background: rgba(0,0,0,.16);
-  border:1px solid rgba(255,255,255,.08);
-  border-radius:12px;
-}
-.ioCell label{
-  font-family: var(--mono);
-  font-size: 11px;
-  color: var(--muted);
-}
-
-.toggle{
-  width: 38px;
-  height: 22px;
-  border-radius: 999px;
   position: relative;
-  background: rgba(255,255,255,.10);
+  display: grid;
-  border:1px solid rgba(255,255,255,.14);
+  place-items: center;
-  cursor:pointer;
+  width: 100%;
-}
+  border: 1px solid var(--led-off-border);
-.toggle::after{
-  content:"";
-  width: 16px;
-  height: 16px;
-  position:absolute;
-  top:2px;
-  left:2px;
   border-radius: 999px;
-  background: rgba(255,255,255,.45);
+  background: var(--led-off-bg);
-  transition: left .12s ease, background .12s ease;
+  aspect-ratio: 1 / 1;
-}
-.toggle.on{
-  background: rgba(34,197,94,.24);
-  border-color: rgba(34,197,94,.55);
-}
-.toggle.on::after{
-  left: 20px;
-  background: rgba(34,197,94,.75);
 }
 
-.momentary{
+.led::after {
-  width: 40px;
+  content: attr(data-bit);
-  height: 28px;
+  color: var(--text-muted);
+  font-family: var(--mono);
+  font-size: 8px;
+  line-height: 1;
+}
+
+.led.on {
+  border-color: var(--led-on-border);
+  background: var(--led-on-bg);
+  box-shadow: 0 0 6px color-mix(in srgb, var(--led-on-bg) 50%, transparent);
+}
+
+.hexRow {
+  display: grid;
+  grid-template-columns: 1fr;
+  gap: 6px;
+  overflow-x: hidden;
+}
+
+.hexGroup {
+  display: grid;
+  grid-template-columns: repeat(8, minmax(0, 1fr));
+  gap: 4px;
+  width: 100%;
+  padding: 6px;
+  border: 1px solid var(--border-soft);
   border-radius: 10px;
-  border:1px solid rgba(255,255,255,.14);
+  background: var(--surface-muted);
-  background: rgba(255,255,255,.08);
-  cursor:pointer;
-}
-.momentary.down{
-  background: rgba(245,158,11,.25);
-  border-color: rgba(245,158,11,.55);
-  box-shadow: 0 0 12px rgba(245,158,11,.18);
 }
 
-.logs{
+.hexDigitWrap {
-  grid-column: 2 / 3;
+  display: flex;
-  display:flex;
+  flex-direction: column;
-  flex-direction:column;
+  align-items: center;
-  min-height: 0;
+  min-width: 0;
 }
-.logView{
+
-  margin:0;
+.sevenSeg {
-  padding:12px;
+  position: relative;
-  height:100%;
+  width: 100%;
-  overflow:auto;
+  max-width: 88px;
-  background: rgba(0,0,0,.22);
+  aspect-ratio: 88 / 136;
+  padding: 8%;
+  border: 1px solid var(--border-strong);
+  border-radius: 12px;
+  background: var(--surface-soft);
+}
+
+.seg {
+  position: absolute;
+  border-radius: 6px;
+  background: var(--seg-off-bg);
+}
+
+.seg.on {
+  background: var(--seg-on-bg);
+  box-shadow: 0 0 4px color-mix(in srgb, var(--seg-on-bg) 45%, transparent);
+}
+
+.seg.a { top: 8%; left: 21%; width: 58%; height: 7%; }
+.seg.b { top: 14%; right: 11%; width: 10%; height: 34%; }
+.seg.c { bottom: 14%; right: 11%; width: 10%; height: 34%; }
+.seg.d { bottom: 8%; left: 21%; width: 58%; height: 7%; }
+.seg.e { bottom: 14%; left: 11%; width: 10%; height: 34%; }
+.seg.f { top: 14%; left: 11%; width: 10%; height: 34%; }
+.seg.g { top: 46.5%; left: 21%; width: 58%; height: 7%; }
+.seg.dp {
+  right: 5%;
+  bottom: 5%;
+  width: 9%;
+  height: 9%;
+  border-radius: 999px;
+}
+
+.digitLabel {
+  margin-top: 4px;
+  color: var(--text-muted);
+  font-family: var(--mono);
+  font-size: 10px;
+}
+
+.inputs {
+  display: flex;
+  flex-direction: column;
+  min-height: 0;
+  flex: 1.2 1 560px;
+}
+
+.twoCols {
+  display: grid;
+  gap: 12px;
+  min-height: 0;
+  padding: 12px;
+  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
+}
+
+.ioGrid {
+  display: grid;
+  gap: 6px;
+  grid-template-columns: repeat(auto-fit, minmax(64px, 1fr));
+}
+
+.ioCell {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 4px;
+  min-width: 64px;
+  min-height: 52px;
+  padding: 6px 4px;
+  border: 1px solid var(--border-soft);
+  border-radius: 12px;
+  background: var(--surface-soft);
+}
+
+.ioCell label {
+  color: var(--text-muted);
+  font-family: var(--mono);
+  font-size: 11px;
+}
+
+.toggle {
+  position: relative;
+  width: 34px;
+  height: 20px;
+  border: 1px solid var(--border-strong);
+  border-radius: 999px;
+  background: var(--toggle-off-bg);
+  cursor: pointer;
+}
+
+.toggle::after {
+  content: "";
+  position: absolute;
+  top: 2px;
+  left: 2px;
+  width: 14px;
+  height: 14px;
+  border-radius: 999px;
+  background: var(--toggle-off-knob);
+  transition: left 0.12s ease, background 0.12s ease;
+}
+
+.toggle.on {
+  background: var(--toggle-on-bg);
+  box-shadow: 0 0 0 1px color-mix(in srgb, var(--toggle-on-knob) 35%, transparent);
+}
+
+.toggle.on::after {
+  left: 16px;
+  background: var(--toggle-on-knob);
+}
+
+.momentary {
+  width: 34px;
+  height: 24px;
+  border: 1px solid var(--momentary-border);
+  border-radius: var(--radius-sm);
+  background: var(--momentary-bg);
+}
+
+.momentary.down {
+  border-color: var(--momentary-down-border);
+  background: var(--momentary-down-bg);
+  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent-soft) 35%, transparent);
+}
+
+.keypadGrid {
+  display: grid;
+  gap: 6px;
+  grid-template-columns: repeat(4, minmax(50px, 1fr));
+}
+
+.keypadBtn {
+  width: 100%;
+  min-height: 32px;
+  font-family: var(--mono);
+  font-size: 12px;
+}
+
+.keypadBtn.op {
+  background: var(--keypad-op-bg);
+}
+
+.keypadBtn.op:hover {
+  background: var(--accent-muted);
+}
+
+.logs {
+  display: flex;
+  flex-direction: column;
+  min-height: 0;
+  flex: 1 1 560px;
+}
+
+.logView {
+  height: 100%;
+  margin: 0;
+  padding: 12px;
+  overflow: auto;
+  white-space: pre-wrap;
+  word-break: break-word;
+  background: var(--surface-soft);
   font-family: var(--mono);
   font-size: 12px;
   line-height: 1.35;
-  white-space: pre-wrap;
-  word-break: break-word;
 }
 
-/* Responsive */
+@media (max-width: 1100px) {
-@media (max-width: 1100px){
+  .card {
-  .grid{
+    flex-basis: 100%;
-    grid-template-columns: 1fr;
-    grid-template-rows: auto;
   }
-  .inputs, .logs{
+
-    grid-column: auto;
+  .twoCols {
-  }
-  .twoCols{
     grid-template-columns: 1fr;
   }
-}
 
-/* Editor w/ line numbers */
+  .panelTopStatus {
-.editorWrap{
+    margin-left: auto;
-  display:flex;
+    width: auto;
-  width:100%;
+    justify-content: flex-end;
-  height:100%;
+  }
-  min-height: 0;
-  background: rgba(0,0,0,.22);
-}
-
-.lineGutter{
-  margin:0;
-  padding:12px 10px 12px 12px;
-  width: 54px;                /* gutter width */
-  overflow:hidden;
-  user-select:none;
-  text-align:right;
-  color: rgba(159,176,208,.85);
-  font-family: var(--mono);
-  font-size: 13px;
-  line-height: 1.35;
-  border-right: 1px solid rgba(255,255,255,.06);
-  background: rgba(0,0,0,.10);
-}
-
-#lineGutter .ln { display:block; }
-
-textarea#vhdlEditor{
-  overscroll-behavior-y: none;
-  flex:1;
-  height:100%;
-  padding:12px;
-  background: transparent; /* uses editorWrap background */
-  color:var(--text);
-  border:0;
-  outline:none;
-  resize:none;
-  font-family: var(--mono);
-  font-size: 13px;
-  line-height: 1.35;
-  overflow:auto;
 }

src/cpu.vhdl

@@ -17,119 +17,6 @@ port (
 end circuit;
 
 
-library ieee;
-use ieee.std_logic_1164.all;
-use ieee.numeric_std.all;
-
-entity alu is
-  Port (
-    func: in unsigned(3 downto 0);
-    a: in unsigned(7 downto 0);
-    b: in unsigned(7 downto 0);
-    carry_in: in std_logic;
-    o: out unsigned(7 downto 0);
-    carry_out: out std_logic;
-    zero: out std_logic;
-    gt: out std_logic;
-    lt: out std_logic;
-    eq: out std_logic
-  );
-end alu;
-
-architecture Behavioral of alu is
-    signal tmp: unsigned(8 downto 0) := "000000000";
-begin
-  with func select
-    tmp <=  ("0"&a) + ("0"&b) when x"0",
-          ("0"&a) + ("0"&b) + (x"00"&carry_in) when x"1",
-          ("0"&a) - ("0"&b) when x"2",
-          ("0"&a) - ("0"&b) - (x"00"&carry_in) when x"3",
-          ("0"&a) and ("0"&b) when x"4",
-          ("0"&a) or ("0"&b) when x"5",
-          ("0"&a) xor ("0"&b) when x"6",
-          "0"&x"00" when others;
-
-  zero <= '1' when tmp = 0 else '0';
-  eq <= '1' when a = b else '0';
-  lt <= '1' when a < b else '0';
-  gt <= '1' when a > b else '0';
-  carry_out <= tmp(8); 
-  o <= tmp(7 downto 0);
-
-end Behavioral ; -- Behavioral
-
-library ieee;
-use ieee.std_logic_1164.all;
-use ieee.numeric_std.all;
-
-entity ram_8x256 is
-    Port (
-        clk   : in  std_logic;
-        we    : in  std_logic;  -- write enable
-        addr  : in  unsigned(7 downto 0); -- 8-bit address
-        din   : in  unsigned(7 downto 0); -- data input
-        dout  : out unsigned(7 downto 0)  -- data output
-    );
-end ram_8x256;
-
-architecture Behavioral of ram_8x256 is
-    type ram_type is array (0 to 255) of unsigned(7 downto 0);
-    signal ram : ram_type := (others => x"AB");
-begin
-    process(clk)
-    begin
-        if rising_edge(clk) then
-            if we = '1' then
-                ram(to_integer(unsigned(addr))) <= din;
-            end if;
-
-            dout <= ram(to_integer(unsigned(addr)));
-        end if;
-    end process;
-end Behavioral;
-
-
-library ieee;
-use ieee.std_logic_1164.all;
-use ieee.numeric_std.all;
-
-entity inst_ram_8x256 is
-    Port (
-        clk   : in  std_logic;
-        addr  : in  unsigned(7 downto 0); -- 8-bit address
-        dout  : out unsigned(7 downto 0)  -- data output
-    );
-end inst_ram_8x256;
-
-architecture Behavioral of inst_ram_8x256 is
-    type ram_type is array (0 to 255) of unsigned(7 downto 0);
-    signal ram : ram_type := (
-      0 => x"A0", -- 0 => a
-      1 => x"B1", -- 1 => b
-      2 => x"10", -- a+b => out
-      3 => x"FE", -- out
-      4 => x"AE", -- out => a
-      5 => x"01", -- swap a/b
-      
-      6 => x"3F", -- cmp 144, b
-      7 => x"90",
-      
-      8 => x"C7", -- jump to 2 if 144 <= b
-      9 => x"02",
-      
-      10 => x"FF", -- halt
-      others => (others => '0')
-    );
-begin
-    process(clk)
-    begin
-        if rising_edge(clk) or falling_edge(clk) then
-            dout <= ram(to_integer(unsigned(addr)));
-        end if;
-    end process;
-end Behavioral;
-
-
 library ieee;
 use ieee.std_logic_1164.all;
 use ieee.numeric_std.all;

src/dram.vhdl

@@ -0,0 +1,29 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity ram_8x256 is
+    Port (
+        clk   : in  std_logic;
+        we    : in  std_logic;  -- write enable
+        addr  : in  unsigned(7 downto 0); -- 8-bit address
+        din   : in  unsigned(7 downto 0); -- data input
+        dout  : out unsigned(7 downto 0)  -- data output
+    );
+end ram_8x256;
+
+architecture Behavioral of ram_8x256 is
+    type ram_type is array (0 to 255) of unsigned(7 downto 0);
+    signal ram : ram_type := (others => x"AB");
+begin
+    process(clk)
+    begin
+        if rising_edge(clk) then
+            if we = '1' then
+                ram(to_integer(unsigned(addr))) <= din;
+            end if;
+
+            dout <= ram(to_integer(unsigned(addr)));
+        end if;
+    end process;
+end Behavioral;

src/iram.vhdl

@@ -0,0 +1,39 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity inst_ram_8x256 is
+    Port (
+        clk   : in  std_logic;
+        addr  : in  unsigned(7 downto 0); -- 8-bit address
+        dout  : out unsigned(7 downto 0)  -- data output
+    );
+end inst_ram_8x256;
+
+architecture Behavioral of inst_ram_8x256 is
+    type ram_type is array (0 to 255) of unsigned(7 downto 0);
+    signal ram : ram_type := (
+      0 => x"A0", -- 0 => a
+      1 => x"B1", -- 1 => b
+      2 => x"10", -- a+b => out
+      3 => x"FE", -- out
+      4 => x"AE", -- out => a
+      5 => x"01", -- swap a/b
+      
+      6 => x"3F", -- cmp 144, b
+      7 => x"90",
+      
+      8 => x"C7", -- jump to 2 if 144 <= b
+      9 => x"02",
+      
+      10 => x"FF", -- halt
+      others => (others => '0')
+    );
+begin
+    process(clk)
+    begin
+        if rising_edge(clk) or falling_edge(clk) then
+            dout <= ram(to_integer(unsigned(addr)));
+        end if;
+    end process;
+end Behavioral;