diff --git a/data/computercraft/lua/bios.lua b/data/computercraft/lua/bios.lua
index 104adbd..c262f09 100644
--- a/data/computercraft/lua/bios.lua
+++ b/data/computercraft/lua/bios.lua
@@ -1,4 +1,4 @@
-_G._HOST = _G._HOST .. " (LeonOS 0.2.2)"
+_G._HOST = _G._HOST .. " (LeonOS 0.2.3)"
 local fs = rawget(_G, "fs")
 
 _G._RC_ROM_DIR = _RC_ROM_DIR or (...) and fs.exists("/leonos") and "/leonos" or "/rom"
@@ -32,7 +32,7 @@ local rc = {
   _VERSION = {
     major = 0,
     minor = 2,
-    patch = 2
+    patch = 3
   },
   queueEvent  = pull(os, "queueEvent"),
   startTimer  = pull(os, "startTimer"),
diff --git a/data/computercraft/lua/rom/startup/50_audio.lua b/data/computercraft/lua/rom/startup/50_audio.lua
deleted file mode 100644
index 66ca3f4..0000000
--- a/data/computercraft/lua/rom/startup/50_audio.lua
+++ /dev/null
@@ -1,27 +0,0 @@
--- LeonOS Startup Music
-local rc = ...
-local peripheral = require("peripheral")
-local speaker = peripheral.find("speaker")
-
--- 检查是否连接了扬声器
-if speaker then
-  -- 简单的开机音乐（C大调音阶）
-  -- 格式: {instrument = 乐器, pitch = 音高(半音), duration = 持续时间}
-  local notes = {
-    {instrument = "harp", pitch = 6, duration = 0.25},  -- C4
-    {instrument = "harp", pitch = 8, duration = 0.25},  -- D4
-    {instrument = "harp", pitch = 10, duration = 0.25}, -- E4
-    {instrument = "harp", pitch = 11, duration = 0.25}, -- F4
-    {instrument = "harp", pitch = 13, duration = 0.25}, -- G4
-    {instrument = "harp", pitch = 15, duration = 0.25}, -- A4
-    {instrument = "harp", pitch = 17, duration = 0.25}, -- B4
-    {instrument = "harp", pitch = 18, duration = 0.5}   -- C5
-  }
-
-  -- 播放音乐
-  for _, note_info in ipairs(notes) do
-    -- 播放音符，使用默认音量1.0
-    speaker.playNote(note_info.instrument, 1.0, note_info.pitch)
-    rc.sleep(note_info.duration)
-  end
-end
\ No newline at end of file
diff --git a/data/computercraft/lua/rom/startup/50_settings.lua b/data/computercraft/lua/rom/startup/50_settings.lua
new file mode 100644
index 0000000..b546ee2
--- /dev/null
+++ b/data/computercraft/lua/rom/startup/50_settings.lua
@@ -0,0 +1,101 @@
+-- setting definitions
+
+local settings = require("settings")
+
+settings.define("list.show_hidden", {
+  description = "Show hidden files in list's output",
+  type = "boolean",
+  default = false
+})
+
+settings.define("bios.compat_mode", {
+  description = "Attempt some LeonOS compatibility by injecting APIs into _G.",
+  type = "boolean",
+  default = false
+})
+
+settings.define("shell.tracebacks", {
+  description = "Show error tracebacks in the shell.",
+  type = "boolean",
+  default = false
+})
+
+settings.define("edit.scroll_offset", {
+  description = "How many lines to keep between the cursor and the screen edge.",
+  type = "number",
+  default = 3
+})
+
+settings.define("edit.force_highlight", {
+  description = "Whether to use the highlighting editor, even on basic computers.",
+  type = "boolean",
+  default = false
+})
+
+settings.define("edit.scroll_factor", {
+  description = "Related to how many lines the editor should jump at a time when scrolling. Determined by term_height/scroll_factor.  Adjust this for performance.",
+  type = "number",
+  default = 8
+})
+
+settings.define("edit.color_separator", {
+  description = "What color separating characters (e.g. ()[];{}) should be.",
+  type = "string",
+  default = "lightBlue"
+})
+
+settings.define("edit.color_operator", {
+  description = "What color operators (e.g. +-/*) should be.",
+  type = "string",
+  default = "lightGray"
+})
+
+settings.define("edit.color_keyword", {
+  description = "What color keywords (e.g. local, for, if) should be.",
+  type = "string",
+  default = "orange"
+})
+
+settings.define("edit.color_boolean", {
+  description = "What color booleans (true/false) should be.",
+  type = "string",
+  default = "purple"
+})
+
+settings.define("edit.color_comment", {
+  description = "What color comments should be.",
+  type = "string",
+  default = "gray"
+})
+
+settings.define("edit.color_global", {
+  description = "What color globals (e.g. print, require) should be.",
+  type = "string",
+  default = "lime"
+})
+
+settings.define("edit.color_string", {
+  description = "What color strings should be.",
+  type = "string",
+  default = "red"
+})
+
+settings.define("edit.color_number", {
+  description = "What color numbers (e.g. 2, 0xF3, 0.42) should be.",
+  type = "string",
+  default = "magenta"
+})
+
+settings.define("bios.restrict_globals", {
+  description = "Disallow global variables",
+  type = "boolean",
+  default = false
+})
+
+settings.define("bios.parallel_startup", {
+  description = "Run startup scripts from /startup in parallel",
+  type = "boolean",
+  default = false
+})
+
+settings.load()
diff --git a/installer.lua b/installer.lua
index 56b0651..276cdc5 100644
--- a/installer.lua
+++ b/installer.lua
@@ -1,5 +1,5 @@
 -- LeonOS installer
-local INSTALLER_VERSION = "0.2.2"
+local INSTALLER_VERSION = "0.2.3"
 local DEFAULT_ROM_DIR = "/leonos"
 
 print("Start loading LeonOS installer ("..INSTALLER_VERSION..")...")