diff --git a/.github/workflows/ci-linux.yml b/.github/workflows/ci-linux.yml
index 2f877114..83b119af 100644
--- a/.github/workflows/ci-linux.yml
+++ b/.github/workflows/ci-linux.yml
@@ -34,7 +34,7 @@ jobs:
     - name: Install Flatpak runtimes
       run: |
         flatpak install --noninteractive flathub \
-          org.kde.Platform//6.6 org.kde.Sdk//6.6 \
+          org.kde.Platform//6.7 org.kde.Sdk//6.7 \
           org.freedesktop.Sdk.Extension.rust-stable//23.08
       if: ${{ steps.flatpak-runtime.outputs.cache-hit != 'true' }}
     - name: Restore build files
diff --git a/.github/workflows/ci-mac.yml b/.github/workflows/ci-mac.yml
index 979787fb..48ee5b66 100644
--- a/.github/workflows/ci-mac.yml
+++ b/.github/workflows/ci-mac.yml
@@ -21,9 +21,9 @@ jobs:
     name: ${{ inputs.name }}
     runs-on: ${{ inputs.macos }}
     env:
-      CMAKE_PREFIX_PATH: qt/6.6.0/macos
-      QT_URL_BASE: https://download.qt.io/online/qtsdkrepository/mac_x64/desktop/qt6_660/qt.qt6.660.clang_64/6.6.0-0-202310040910qtbase-MacOS-MacOS_12-Clang-MacOS-MacOS_12-X86_64-ARM64.7z
-      QT_URL_SVG: https://download.qt.io/online/qtsdkrepository/mac_x64/desktop/qt6_660/qt.qt6.660.clang_64/6.6.0-0-202310040910qtsvg-MacOS-MacOS_12-Clang-MacOS-MacOS_12-X86_64-ARM64.7z
+      CMAKE_PREFIX_PATH: qt/6.7.2/macos
+      QT_URL_BASE: https://download.qt.io/online/qtsdkrepository/mac_x64/desktop/qt6_672/qt.qt6.672.clang_64/6.7.2-0-202406110330qtbase-MacOS-MacOS_13-Clang-MacOS-MacOS_13-X86_64-ARM64.7z
+      QT_URL_SVG: https://download.qt.io/online/qtsdkrepository/mac_x64/desktop/qt6_672/qt.qt6.672.clang_64/6.7.2-0-202406110330qtsvg-MacOS-MacOS_13-Clang-MacOS-MacOS_13-X86_64-ARM64.7z
     steps:
     - name: Checkout source
       uses: actions/checkout@v4
diff --git a/flatpak.yml b/flatpak.yml
index 9eae697c..05d30f06 100644
--- a/flatpak.yml
+++ b/flatpak.yml
@@ -1,7 +1,7 @@
 app-id: io.github.obhq.Obliteration
 default-branch: stable
 runtime: org.kde.Platform
-runtime-version: '6.6'
+runtime-version: '6.7'
 platform-extensions:
 - org.freedesktop.Platform.GL.default
 sdk: org.kde.Sdk
diff --git a/src/core.h b/src/core.h
index cb047155..278580d8 100644
--- a/src/core.h
+++ b/src/core.h
@@ -13,6 +13,13 @@
 struct Param;
 struct Pkg;
 
+/**
+ * Log category.
+ */
+enum VmmLog {
+    VmmLog_Info,
+};
+
 /**
  * Error object managed by Rust side.
  */
@@ -41,6 +48,26 @@ struct VmmScreen {
     ;
 };
 
+/**
+ * Contains VMM event information.
+ */
+enum VmmEvent_Tag {
+    VmmEvent_Log,
+};
+
+struct VmmEvent_Log_Body {
+    enum VmmLog ty;
+    const char *data;
+    size_t len;
+};
+
+struct VmmEvent {
+    enum VmmEvent_Tag tag;
+    union {
+        struct VmmEvent_Log_Body log;
+    };
+};
+
 #ifdef __cplusplus
 extern "C" {
 #endif // __cplusplus
@@ -89,12 +116,14 @@ struct RustError *update_firmware(const char *root,
 
 void vmm_free(struct Vmm *vmm);
 
-struct Vmm *vmm_run(const char *kernel, const struct VmmScreen *screen, struct RustError **err);
+struct Vmm *vmm_run(const char *kernel,
+                    const struct VmmScreen *screen,
+                    bool (*event)(const struct VmmEvent*, void*),
+                    void *cx,
+                    struct RustError **err);
 
 struct RustError *vmm_draw(struct Vmm *vmm);
 
-void vmm_logs(const struct Vmm *vmm, void *cx, void (*cb)(uint8_t, const char*, size_t, void*));
-
 #if defined(__linux__)
 extern int kvm_check_version(int kvm, bool *compat);
 #endif
diff --git a/src/core/build.rs b/src/core/build.rs
index 00f4098a..8b610e8f 100644
--- a/src/core/build.rs
+++ b/src/core/build.rs
@@ -40,6 +40,7 @@ fn main() {
     conf.export
         .rename
         .insert("KvmTranslation".into(), "kvm_translation".into());
+    conf.enumeration.prefix_with_name = true;
     conf.defines
         .insert("target_os = linux".into(), "__linux__".into());
     conf.defines
diff --git a/src/core/src/vmm/hw/console/context.rs b/src/core/src/vmm/hw/console/context.rs
index 2486908d..a2ccb500 100644
--- a/src/core/src/vmm/hw/console/context.rs
+++ b/src/core/src/vmm/hw/console/context.rs
@@ -1,7 +1,8 @@
-use super::{Console, Log};
+use super::Console;
 use crate::vmm::hv::{CpuIo, IoBuf};
 use crate::vmm::hw::{DeviceContext, Ram};
-use obvirt::console::{Commit, Memory};
+use crate::vmm::VmmEvent;
+use obvirt::console::{Memory, MsgType};
 use std::error::Error;
 use std::mem::offset_of;
 use thiserror::Error;
@@ -10,8 +11,6 @@ use thiserror::Error;
 pub struct Context<'a> {
     dev: &'a Console,
     ram: &'a Ram,
-    file_len: usize,
-    file: String,
     msg_len: usize,
     msg: String,
 }
@@ -21,14 +20,12 @@ impl<'a> Context<'a> {
         Self {
             dev,
             ram,
-            file_len: 0,
-            file: String::new(),
             msg_len: 0,
             msg: String::new(),
         }
     }
 
-    fn read_u32(&self, off: usize, exit: &mut dyn CpuIo) -> Result<u32, ExecError> {
+    fn read_u8(&self, off: usize, exit: &mut dyn CpuIo) -> Result<u8, ExecError> {
         // Get data.
         let data = match exit.buffer() {
             IoBuf::Write(v) => v,
@@ -36,9 +33,11 @@ impl<'a> Context<'a> {
         };
 
         // Parse data.
-        data.try_into()
-            .map(|v| u32::from_ne_bytes(v))
-            .map_err(|_| ExecError::InvalidData(off))
+        if data.len() != 1 {
+            Err(ExecError::InvalidData(off))
+        } else {
+            Ok(data[0])
+        }
     }
 
     fn read_usize(&self, off: usize, exit: &mut dyn CpuIo) -> Result<usize, ExecError> {
@@ -84,7 +83,7 @@ impl<'a> Context<'a> {
 }
 
 impl<'a> DeviceContext for Context<'a> {
-    fn exec(&mut self, exit: &mut dyn CpuIo) -> Result<(), Box<dyn Error>> {
+    fn exec(&mut self, exit: &mut dyn CpuIo) -> Result<bool, Box<dyn Error>> {
         // Check field.
         let off = exit.addr() - self.dev.addr;
 
@@ -92,36 +91,34 @@ impl<'a> DeviceContext for Context<'a> {
             self.msg_len = self.read_usize(off, exit)?;
         } else if off == offset_of!(Memory, msg_addr) {
             self.msg.push_str(self.read_str(off, exit, self.msg_len)?);
-        } else if off == offset_of!(Memory, file_len) {
-            self.file_len = self.read_usize(off, exit)?;
-        } else if off == offset_of!(Memory, file_addr) {
-            self.file = self.read_str(off, exit, self.file_len)?.to_owned();
         } else if off == offset_of!(Memory, commit) {
             // Parse data.
-            let commit = self.read_u32(off, exit)?;
-            let (ty, line) = match Commit::parse(commit) {
+            let commit = self.read_u8(off, exit)?;
+            let ty = match MsgType::from_u8(commit) {
                 Some(v) => v,
                 None => return Err(Box::new(ExecError::InvalidCommit(commit))),
             };
 
-            // Push log.
-            let mut logs = self.dev.logs.lock().unwrap();
+            // Trigger event.
+            let msg = std::mem::take(&mut self.msg);
+            let status = match ty {
+                MsgType::Info => unsafe {
+                    self.dev.event.invoke(VmmEvent::Log {
+                        ty: ty.into(),
+                        data: msg.as_ptr().cast(),
+                        len: msg.len(),
+                    })
+                },
+            };
 
-            logs.push_back(Log {
-                ty,
-                file: std::mem::take(&mut self.file),
-                line,
-                msg: std::mem::take(&mut self.msg),
-            });
-
-            while logs.len() > 10000 {
-                logs.pop_front();
+            if !status {
+                return Ok(false);
             }
         } else {
             return Err(Box::new(ExecError::UnknownField(off)));
         }
 
-        Ok(())
+        Ok(true)
     }
 }
 
@@ -141,5 +138,5 @@ enum ExecError {
     TranslateVaddrFailed(usize, #[source] Box<dyn Error>),
 
     #[error("{0:#} is not a valid commit")]
-    InvalidCommit(u32),
+    InvalidCommit(u8),
 }
diff --git a/src/core/src/vmm/hw/console/mod.rs b/src/core/src/vmm/hw/console/mod.rs
index da0ad342..92526d71 100644
--- a/src/core/src/vmm/hw/console/mod.rs
+++ b/src/core/src/vmm/hw/console/mod.rs
@@ -1,9 +1,8 @@
 use self::context::Context;
 use super::{Device, DeviceContext, Ram};
-use obvirt::console::{Memory, MsgType};
-use std::collections::VecDeque;
+use crate::vmm::VmmEventHandler;
+use obvirt::console::Memory;
 use std::num::NonZero;
-use std::sync::Mutex;
 
 mod context;
 
@@ -11,11 +10,11 @@ mod context;
 pub struct Console {
     addr: usize,
     len: NonZero<usize>,
-    logs: Mutex<VecDeque<Log>>,
+    event: VmmEventHandler,
 }
 
 impl Console {
-    pub fn new(addr: usize, vm_page_size: NonZero<usize>) -> Self {
+    pub fn new(addr: usize, vm_page_size: NonZero<usize>, event: VmmEventHandler) -> Self {
         let len = size_of::<Memory>()
             .checked_next_multiple_of(vm_page_size.get())
             .and_then(NonZero::new)
@@ -23,11 +22,7 @@ impl Console {
 
         addr.checked_add(len.get()).unwrap();
 
-        Self {
-            addr,
-            len,
-            logs: Mutex::default(),
-        }
+        Self { addr, len, event }
     }
 }
 
@@ -44,11 +39,3 @@ impl Device for Console {
         Box::new(Context::new(self, ram))
     }
 }
-
-/// Contains data for each logging entry.
-struct Log {
-    ty: MsgType,
-    file: String,
-    line: u32,
-    msg: String,
-}
diff --git a/src/core/src/vmm/hw/mod.rs b/src/core/src/vmm/hw/mod.rs
index 9dece26f..5a23f468 100644
--- a/src/core/src/vmm/hw/mod.rs
+++ b/src/core/src/vmm/hw/mod.rs
@@ -1,3 +1,4 @@
+use super::VmmEventHandler;
 use crate::vmm::hv::CpuIo;
 use std::collections::BTreeMap;
 use std::error::Error;
@@ -10,12 +11,16 @@ pub use self::ram::*;
 mod console;
 mod ram;
 
-pub fn setup_devices(start_addr: usize, vm_page_size: NonZero<usize>) -> DeviceTree {
+pub fn setup_devices(
+    start_addr: usize,
+    vm_page_size: NonZero<usize>,
+    event: VmmEventHandler,
+) -> DeviceTree {
     let mut map = BTreeMap::<usize, Arc<dyn Device>>::new();
 
     // Console.
     let addr = start_addr;
-    let console = Arc::new(Console::new(addr, vm_page_size));
+    let console = Arc::new(Console::new(addr, vm_page_size, event));
 
     assert!(map.insert(console.addr(), console.clone()).is_none());
 
@@ -60,5 +65,5 @@ pub trait Device: Send + Sync {
 
 /// Context to execute memory-mapped I/O operations on a virtual device.
 pub trait DeviceContext {
-    fn exec(&mut self, exit: &mut dyn CpuIo) -> Result<(), Box<dyn Error>>;
+    fn exec(&mut self, exit: &mut dyn CpuIo) -> Result<bool, Box<dyn Error>>;
 }
diff --git a/src/core/src/vmm/mod.rs b/src/core/src/vmm/mod.rs
index c970a25e..1c0876fc 100644
--- a/src/core/src/vmm/mod.rs
+++ b/src/core/src/vmm/mod.rs
@@ -5,16 +5,15 @@ use self::screen::Screen;
 use crate::error::RustError;
 use obconf::{BootEnv, Vm};
 use obvirt::console::MsgType;
-use std::collections::{BTreeMap, VecDeque};
+use std::collections::BTreeMap;
 use std::error::Error;
 use std::ffi::{c_char, c_void, CStr};
 use std::io::Read;
 use std::num::NonZero;
-use std::ops::Deref;
 use std::ptr::null_mut;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::mpsc::Sender;
-use std::sync::{Arc, Mutex};
+use std::sync::Arc;
 use std::thread::JoinHandle;
 use thiserror::Error;
 
@@ -32,6 +31,8 @@ pub unsafe extern "C" fn vmm_free(vmm: *mut Vmm) {
 pub unsafe extern "C" fn vmm_run(
     kernel: *const c_char,
     screen: *const VmmScreen,
+    event: unsafe extern "C" fn(*const VmmEvent, *mut c_void) -> bool,
+    cx: *mut c_void,
     err: *mut *mut RustError,
 ) -> *mut Vmm {
     // Check if path UTF-8.
@@ -359,7 +360,8 @@ pub unsafe extern "C" fn vmm_run(
     }
 
     // Allocate arguments.
-    let devices = Arc::new(setup_devices(Ram::SIZE, vm_page_size));
+    let event = VmmEventHandler { fp: event, cx };
+    let devices = Arc::new(setup_devices(Ram::SIZE, vm_page_size, event));
     let env = BootEnv::Vm(Vm {
         console: devices.console().addr(),
     });
@@ -398,7 +400,6 @@ pub unsafe extern "C" fn vmm_run(
     };
 
     // Setup arguments for main CPU.
-    let logs = Arc::new(Mutex::new(VecDeque::new()));
     let shutdown = Arc::new(AtomicBool::new(false));
     let args = CpuArgs {
         hv,
@@ -440,7 +441,6 @@ pub unsafe extern "C" fn vmm_run(
     let vmm = Vmm {
         cpus: vec![main],
         screen,
-        logs,
         shutdown,
     };
 
@@ -455,19 +455,6 @@ pub unsafe extern "C" fn vmm_draw(vmm: *mut Vmm) -> *mut RustError {
     }
 }
 
-#[no_mangle]
-pub unsafe extern "C" fn vmm_logs(
-    vmm: *const Vmm,
-    cx: *mut c_void,
-    cb: unsafe extern "C" fn(u8, *const c_char, usize, *mut c_void),
-) {
-    let logs = (*vmm).logs.lock().unwrap();
-
-    for (ty, msg) in logs.deref() {
-        cb(*ty as u8, msg.as_ptr().cast(), msg.len(), cx);
-    }
-}
-
 fn main_cpu(args: &CpuArgs, entry: usize, map: RamMap, status: Sender<Result<(), MainCpuError>>) {
     // Create vCPU.
     let mut cpu = match args.hv.create_cpu(0) {
@@ -616,7 +603,13 @@ fn run_cpu(mut cpu: impl Cpu, args: &CpuArgs) {
         // Check if I/O.
         match exit.into_io() {
             Ok(io) => match exec_io(&mut devices, io) {
-                Ok(_) => continue,
+                Ok(status) => {
+                    if !status {
+                        args.shutdown.store(true, Ordering::Relaxed);
+                    }
+
+                    continue;
+                }
                 Err(_) => todo!(),
             },
             Err(_) => todo!(),
@@ -627,7 +620,7 @@ fn run_cpu(mut cpu: impl Cpu, args: &CpuArgs) {
 fn exec_io<'a>(
     devices: &mut BTreeMap<usize, (Box<dyn DeviceContext + 'a>, NonZero<usize>)>,
     mut io: impl CpuIo,
-) -> Result<(), Box<dyn Error>> {
+) -> Result<bool, Box<dyn Error>> {
     // Get target device.
     let addr = io.addr();
     let (_, (dev, end)) = devices.range_mut(..=addr).last().unwrap();
@@ -663,7 +656,6 @@ fn get_page_size() -> Result<NonZero<usize>, std::io::Error> {
 pub struct Vmm {
     cpus: Vec<JoinHandle<()>>,
     screen: self::screen::Default,
-    logs: Arc<Mutex<VecDeque<(MsgType, String)>>>,
     shutdown: Arc<AtomicBool>,
 }
 
@@ -689,6 +681,48 @@ pub struct VmmScreen {
     pub view: usize,
 }
 
+/// Encapsulates a function to handle VMM events.
+#[derive(Clone, Copy)]
+struct VmmEventHandler {
+    fp: unsafe extern "C" fn(*const VmmEvent, *mut c_void) -> bool,
+    cx: *mut c_void,
+}
+
+impl VmmEventHandler {
+    unsafe fn invoke(self, e: VmmEvent) -> bool {
+        (self.fp)(&e, self.cx)
+    }
+}
+
+unsafe impl Send for VmmEventHandler {}
+unsafe impl Sync for VmmEventHandler {}
+
+/// Contains VMM event information.
+#[repr(C)]
+#[allow(dead_code)] // TODO: Figure out why Rust think fields in each enum are not used.
+pub enum VmmEvent {
+    Log {
+        ty: VmmLog,
+        data: *const c_char,
+        len: usize,
+    },
+}
+
+/// Log category.
+#[repr(C)]
+#[derive(Clone, Copy)]
+pub enum VmmLog {
+    Info,
+}
+
+impl From<MsgType> for VmmLog {
+    fn from(value: MsgType) -> Self {
+        match value {
+            MsgType::Info => Self::Info,
+        }
+    }
+}
+
 /// Encapsulates arguments for a function to run a CPU.
 struct CpuArgs {
     hv: Arc<self::hv::Default>,
diff --git a/src/main.cpp b/src/main.cpp
index 39e2fa02..cf58e398 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,4 +1,3 @@
-#include "core.hpp"
 #include "initialize_wizard.hpp"
 #include "main_window.hpp"
 #include "settings.hpp"
@@ -10,6 +9,7 @@
 #include <QApplication>
 #include <QMessageBox>
 #include <QMetaObject>
+#include <QThread>
 #ifndef __APPLE__
 #include <QVersionNumber>
 #include <QVulkanInstance>
@@ -27,14 +27,19 @@ static void panicHook(
     size_t mlen,
     void *cx)
 {
-    QMetaObject::invokeMethod(reinterpret_cast<QObject *>(cx), [=]() {
+    auto main = reinterpret_cast<QObject *>(cx);
+    auto type = QThread::currentThread() == main->thread()
+        ? Qt::DirectConnection
+        : Qt::BlockingQueuedConnection;
+
+    QMetaObject::invokeMethod(main, [=]() {
         auto text = QString("An unexpected error occurred at %1:%2: %3")
             .arg(QString::fromUtf8(file, flen))
             .arg(line)
             .arg(QString::fromUtf8(msg, mlen));
 
         QMessageBox::critical(nullptr, "Fatal Error", text);
-    });
+    }, type);
 }
 
 int main(int argc, char *argv[])
diff --git a/src/main_window.cpp b/src/main_window.cpp
index 71f5867e..495b2673 100644
--- a/src/main_window.cpp
+++ b/src/main_window.cpp
@@ -30,6 +30,7 @@
 #endif
 
 #include <filesystem>
+#include <iostream>
 #include <utility>
 
 #include <string.h>
@@ -234,25 +235,14 @@ void MainWindow::openSystemFolder()
 
 void MainWindow::viewLogs()
 {
-    // Check for previous window.
     if (m_logs) {
         m_logs->activateWindow();
         m_logs->raise();
-        return;
-    } else if (!m_kernel) {
-        QMessageBox::information(this, "Information", "The kernel is not running.");
-        return;
+    } else {
+        m_logs = new LogsViewer();
+        m_logs->setAttribute(Qt::WA_DeleteOnClose);
+        m_logs->show();
     }
-
-    // Create a window.
-    m_logs = new LogsViewer();
-
-    vmm_logs(m_kernel, m_logs.get(), [](uint8_t, const char *msg, size_t len, void *cx) {
-        reinterpret_cast<LogsViewer *>(cx)->append(QString::fromUtf8(msg, len));
-    });
-
-    m_logs->setAttribute(Qt::WA_DeleteOnClose);
-    m_logs->show();
 }
 
 void MainWindow::reportIssue()
@@ -332,7 +322,7 @@ void MainWindow::startKernel()
     }
 #endif
 
-    vmm = vmm_run(kernel.c_str(), &screen, &error);
+    vmm = vmm_run(kernel.c_str(), &screen, MainWindow::vmmHandler, this, &error);
 
     if (!vmm) {
         m_main->setCurrentIndex(0);
@@ -373,6 +363,19 @@ void MainWindow::updateScreen()
     m_screen->requestUpdate();
 }
 
+void MainWindow::log(VmmLog type, const QString &msg)
+{
+    if (m_logs) {
+        m_logs->append(msg);
+    } else {
+        switch (type) {
+        case VmmLog_Info:
+            std::cout << msg.toStdString();
+            break;
+        }
+    }
+}
+
 bool MainWindow::loadGame(const QString &gameId)
 {
     auto gamesDirectory = readGamesDirectorySetting();
@@ -453,3 +456,21 @@ bool MainWindow::requireEmulatorStopped()
 
     return false;
 }
+
+bool MainWindow::vmmHandler(const VmmEvent *ev, void *cx)
+{
+    auto w = reinterpret_cast<MainWindow *>(cx);
+
+    switch (ev->tag) {
+    case VmmEvent_Log:
+        QMetaObject::invokeMethod(
+            w,
+            &MainWindow::log,
+            Qt::QueuedConnection,
+            ev->log.ty,
+            QString::fromUtf8(ev->log.data, ev->log.len));
+        break;
+    }
+
+    return true;
+}
diff --git a/src/main_window.hpp b/src/main_window.hpp
index 1f83ce31..6124f97d 100644
--- a/src/main_window.hpp
+++ b/src/main_window.hpp
@@ -37,14 +37,17 @@ private slots:
     void updateScreen();
 
 private:
+    void log(VmmLog type, const QString &msg);
     bool loadGame(const QString &gameId);
     void restoreGeometry();
     bool requireEmulatorStopped();
 
+    static bool vmmHandler(const VmmEvent *ev, void *cx);
+
     QStackedWidget *m_main;
     GameListModel *m_games;
     LaunchSettings *m_launch;
     Screen *m_screen;
     QPointer<LogsViewer> m_logs;
-    Rust<Vmm> m_kernel;
+    Rust<Vmm> m_kernel; // Destroy first.
 };
diff --git a/src/obkrnl/Cargo.toml b/src/obkrnl/Cargo.toml
index 88840a78..2e45e3a8 100644
--- a/src/obkrnl/Cargo.toml
+++ b/src/obkrnl/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+anstyle = { version = "1.0.8", default-features = false }
 macros = { path = "../macros" }
 obconf = { path = "../obconf" }
 obvirt = { path = "../obvirt" }
diff --git a/src/obkrnl/src/console/mod.rs b/src/obkrnl/src/console/mod.rs
index 1f9b7c7a..4e444ded 100644
--- a/src/obkrnl/src/console/mod.rs
+++ b/src/obkrnl/src/console/mod.rs
@@ -1,16 +1,17 @@
 use crate::config::boot_env;
-use core::fmt::Arguments;
+use anstyle::{AnsiColor, Color, Style};
+use core::fmt::{Arguments, Display, Formatter};
 use obconf::BootEnv;
 use obvirt::console::MsgType;
 
 mod vm;
 
-/// Write single line of information log.
+/// Write information log.
 ///
 /// When running inside a VM each call will cause a VM to exit multiple times so don't do this in a
 /// performance critical path.
 ///
-/// The line should not contains LF character.
+/// The LF character will be automatically appended.
 #[macro_export]
 macro_rules! info {
     ($($args:tt)*) => {
@@ -18,9 +19,37 @@ macro_rules! info {
     };
 }
 
-#[doc(hidden)]
 pub fn info(file: &str, line: u32, msg: Arguments) {
+    let log = Log {
+        style: Style::new().fg_color(Some(Color::Ansi(AnsiColor::BrightCyan))),
+        cat: 'I',
+        file,
+        line,
+        msg,
+    };
+
     match boot_env() {
-        BootEnv::Vm(env) => self::vm::print(env, MsgType::Info, file, line, msg),
+        BootEnv::Vm(env) => self::vm::print(env, MsgType::Info, log),
+    }
+}
+
+/// [`Display`] implementation to format each log.
+struct Log<'a> {
+    style: Style,
+    cat: char,
+    file: &'a str,
+    line: u32,
+    msg: Arguments<'a>,
+}
+
+impl<'a> Display for Log<'a> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
+        writeln!(
+            f,
+            "{}++++++++++++++++++ {} {}:{}{0:#}",
+            self.style, self.cat, self.file, self.line
+        )?;
+        self.msg.fmt(f)?;
+        Ok(())
     }
 }
diff --git a/src/obkrnl/src/console/vm.rs b/src/obkrnl/src/console/vm.rs
index a528098a..b17de331 100644
--- a/src/obkrnl/src/console/vm.rs
+++ b/src/obkrnl/src/console/vm.rs
@@ -1,17 +1,15 @@
-use core::fmt::{Arguments, Write};
+use core::fmt::{Display, Write};
 use core::ptr::{addr_of_mut, write_volatile};
 use obconf::Vm;
-use obvirt::console::{Commit, Memory, MsgType};
+use obvirt::console::{Memory, MsgType};
 
-pub fn print(env: &Vm, ty: MsgType, file: &str, line: u32, msg: Arguments) {
+pub fn print(env: &Vm, ty: MsgType, msg: impl Display) {
     let c = env.console as *mut Memory;
+    let mut w = Writer(c);
 
-    unsafe { write_volatile(addr_of_mut!((*c).file_len), file.len()) };
-    unsafe { write_volatile(addr_of_mut!((*c).file_addr), file.as_ptr() as usize) };
+    writeln!(w, "{msg}").unwrap();
 
-    Writer(c).write_fmt(msg).unwrap();
-
-    unsafe { write_volatile(addr_of_mut!((*c).commit), Commit::new(ty, line)) };
+    unsafe { write_volatile(addr_of_mut!((*c).commit), ty) };
 }
 
 struct Writer(*mut Memory);
diff --git a/src/obvirt/src/console/mod.rs b/src/obvirt/src/console/mod.rs
index 2459831b..4bf417d1 100644
--- a/src/obvirt/src/console/mod.rs
+++ b/src/obvirt/src/console/mod.rs
@@ -2,41 +2,14 @@
 ///
 /// The sequence of operations on a console memory is per-cpu. The kernel will start each log by:
 ///
-/// 1. Write [`Self::file_len`] then [`Self::file_addr`].
-/// 2. Write [`Self::msg_len`] then [`Self::msg_addr`].
-/// 3. Repeat step 2 until the whole message has been written.
-/// 4. Write [`Self::commit`].
+/// 1. Write [`Self::msg_len`] then [`Self::msg_addr`].
+/// 2. Repeat step 1 until the whole message has been written.
+/// 3. Write [`Self::commit`].
 #[repr(C)]
 pub struct Memory {
-    pub file_len: usize,
-    pub file_addr: usize,
     pub msg_len: usize,
     pub msg_addr: usize,
-    pub commit: Commit,
-}
-
-/// Struct to commit a log.
-#[repr(transparent)]
-pub struct Commit(u32);
-
-impl Commit {
-    /// # Panics
-    /// If `line` greater than 0xffffff.
-    pub fn new(ty: MsgType, line: u32) -> Self {
-        assert!(line <= 0xffffff);
-
-        Self((ty as u32) << 24 | line)
-    }
-
-    pub fn parse(raw: u32) -> Option<(MsgType, u32)> {
-        let line = raw & 0xffffff;
-        let ty = match (raw >> 24) as u8 {
-            v if v == MsgType::Info as u8 => MsgType::Info,
-            _ => return None,
-        };
-
-        Some((ty, line))
-    }
+    pub commit: MsgType,
 }
 
 /// Type of console message.
@@ -45,3 +18,14 @@ impl Commit {
 pub enum MsgType {
     Info,
 }
+
+impl MsgType {
+    pub fn from_u8(v: u8) -> Option<Self> {
+        let v = match v {
+            v if v == MsgType::Info as u8 => MsgType::Info,
+            _ => return None,
+        };
+
+        Some(v)
+    }
+}