diff --git a/assets/raw/ReligionSphereRelations.csv b/assets/raw/ReligionSphereRelations.csv
index d20f04cd6..5b653dd91 100644
--- a/assets/raw/ReligionSphereRelations.csv
+++ b/assets/raw/ReligionSphereRelations.csv
@@ -2,11 +2,22 @@
 # 0: neutral, 1: amicable (welcoming), -1: hostile (will not barter, like 'unassigned' neutral)
 # -2: enemy (this is the holy war! WAAAGH!!)
 
+# Put some ideas here:
+
+# ABSTRACT (ideologies, philosophies, etc.) #
 # war: WAAAGH!!
 # randomness: All hail the Random Number God!
 # strength: tranees; disciplinants
 # brute: mostly "brute" wild mobs, or spheres that is fond of brute-ness
 
+# TANGIBLE (certain creatures, (gem)stones, metals) #
+# steels: dwarven1
+# stones: dwarven2
+# octocat: a chimera creature of octopus and cat. put that to the gitchen!
+
+
+
+
 "↓from  to→";"strength";"harmony";"war";"randomness";"wealth";"brute";"helix"
 "strength"  ;       "1";      "1";  "0";         "0";     "0";    "0";    "0"
 "harmony"   ;       "0";      "1"; "-1";         "0";     "0";    "0";    "0"
diff --git a/src/net/torvald/terrarum/StateVTTest.kt b/src/net/torvald/terrarum/StateVTTest.kt
index c66061024..fa122bf6f 100644
--- a/src/net/torvald/terrarum/StateVTTest.kt
+++ b/src/net/torvald/terrarum/StateVTTest.kt
@@ -20,8 +20,8 @@ import org.newdawn.slick.state.StateBasedGame
 class StateVTTest : BasicGameState() {
 
     // HiRes: 100x64, LoRes: 80x25
-    val computerInside = BaseTerrarumComputer()
-    val vt = SimpleTextTerminal(SimpleTextTerminal.WHITE, 80, 25,
+    val computerInside = BaseTerrarumComputer(8)
+    val vt = SimpleTextTerminal(SimpleTextTerminal.GREEN, 80, 25,
             computerInside, colour = false, hires = false)
 
 
diff --git a/src/net/torvald/terrarum/virtualcomputer/computer/BaseTerrarumComputer.kt b/src/net/torvald/terrarum/virtualcomputer/computer/BaseTerrarumComputer.kt
index 6a9f87671..c2bb30838 100644
--- a/src/net/torvald/terrarum/virtualcomputer/computer/BaseTerrarumComputer.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/computer/BaseTerrarumComputer.kt
@@ -1,6 +1,5 @@
 package net.torvald.terrarum.virtualcomputer.computer
 
-import com.jme3.math.FastMath
 import org.luaj.vm2.Globals
 import org.luaj.vm2.LuaError
 import org.luaj.vm2.LuaTable
@@ -11,6 +10,7 @@ import org.luaj.vm2.lib.jse.JsePlatform
 import net.torvald.terrarum.KVHashMap
 import net.torvald.terrarum.gameactors.roundInt
 import net.torvald.terrarum.virtualcomputer.luaapi.*
+import net.torvald.terrarum.virtualcomputer.peripheral.*
 import net.torvald.terrarum.virtualcomputer.terminal.*
 import net.torvald.terrarum.virtualcomputer.worldobject.ComputerPartsCodex
 import org.lwjgl.BufferUtils
@@ -30,10 +30,13 @@ import java.util.*
  * @param term : terminal that is connected to the computer fixtures, null if not connected any.
  * Created by minjaesong on 16-09-10.
  */
-class BaseTerrarumComputer() {
+class BaseTerrarumComputer(peripheralSlots: Int) {
+
+    var maxPeripherals: Int = peripheralSlots
+        private set
 
     val DEBUG_UNLIMITED_MEM = false
-    val DEBUG = false
+    val DEBUG = true
 
 
     lateinit var luaJ_globals: Globals
@@ -71,6 +74,8 @@ class BaseTerrarumComputer() {
     lateinit var term: Teletype
         private set
 
+    val peripheralTable = ArrayList<Peripheral>()
+
     // os-related functions. These are called "machine" library-wise.
     private val startupTimestamp: Long = System.currentTimeMillis()
     /** Time elapsed since the power is on. */
@@ -102,6 +107,28 @@ class BaseTerrarumComputer() {
         computerValue["boot"] = computerValue.getAsString("hda")!!
     }
 
+    fun attachPeripheral(peri: Peripheral) {
+        if (peripheralTable.size < maxPeripherals) {
+            peripheralTable.add(peri)
+            peri.loadLib()
+            println("[BaseTerrarumComputer] loading peripheral $peri")
+        }
+        else {
+            throw Error("No vacant peripheral slot")
+        }
+    }
+
+    fun detachPeripheral(peri: Peripheral) {
+        if (peripheralTable.contains(peri)) {
+            peripheralTable.remove(peri)
+            peri.unloadLib()
+            println("[BaseTerrarumComputer] unloading peripheral $peri")
+        }
+        else {
+            throw IllegalArgumentException("Peripheral not exists: $peri")
+        }
+    }
+
     fun attachTerminal(term: Teletype) {
         this.term = term
         initSandbox(term)
@@ -126,7 +153,7 @@ class BaseTerrarumComputer() {
         Filesystem(luaJ_globals, this)
         HostAccessProvider(luaJ_globals, this)
         Input(luaJ_globals, this)
-        Http(luaJ_globals, this)
+        PeripheralInternet(luaJ_globals, this)
         PcSpeakerDriver(luaJ_globals, this)
         WorldInformationProvider(luaJ_globals)
 
@@ -146,7 +173,16 @@ class BaseTerrarumComputer() {
 
         luaJ_globals["computer"] = LuaTable()
         // rest of the "computer" APIs should be implemented in BOOT.lua
-        if (DEBUG) luaJ_globals["emittone"] = ComputerEmitTone(this)
+
+
+
+        // load every peripheral if we're in DEBUG
+        if (DEBUG) {
+            maxPeripherals = 32
+            attachPeripheral(PeripheralInternet(luaJ_globals, this))
+            attachPeripheral(PeripheralPSG(luaJ_globals, this))
+            // ...
+        }
     }
 
     var threadTimer = 0
@@ -253,7 +289,7 @@ class BaseTerrarumComputer() {
 
     class ComputerEmitTone(val computer: BaseTerrarumComputer) : TwoArgFunction() {
         override fun call(millisec: LuaValue, freq: LuaValue): LuaValue {
-            computer.playTone(millisec.toint(), freq.tofloat())
+            computer.playTone(millisec.checkint(), freq.checkdouble())
             return LuaValue.NONE
         }
     }
@@ -264,7 +300,7 @@ class BaseTerrarumComputer() {
 
     private val beepMaxLen = 10000
     // let's regard it as a tracker...
-    private val beepQueue = ArrayList<Pair<Int, Float>>()
+    private val beepQueue = ArrayList<Pair<Int, Double>>()
     private var beepCursor = -1
     private var beepQueueLineExecTimer = 0 // millisec
     private var beepQueueFired = false
@@ -285,7 +321,8 @@ class BaseTerrarumComputer() {
         // complete emitTone queue
         if (beepCursor >= beepQueue.size) {
             clearBeepQueue()
-            if (DEBUG) println("!! Beep queue clear")
+            AL.destroy()
+            if (DEBUG) println("[BaseTerrarumComputer] !! Beep queue clear")
         }
 
         // actually play queue
@@ -303,7 +340,7 @@ class BaseTerrarumComputer() {
         beepQueueLineExecTimer = 0
     }
 
-    fun enqueueBeep(duration: Int, freq: Float) {
+    fun enqueueBeep(duration: Int, freq: Double) {
         beepQueue.add(Pair(Math.min(duration, beepMaxLen), freq))
     }
 
@@ -326,48 +363,48 @@ class BaseTerrarumComputer() {
      *
      *     ,---. (true, true) ,---- (true, false) ----. (false, true) ----- (false, false)
      */
-    private fun makeAudioData(duration: Int, freq: Float,
+    private fun makeAudioData(duration: Int, freq: Double,
                               rampUp: Boolean = true, rampDown: Boolean = true): ByteBuffer {
         val audioData = BufferUtils.createByteBuffer(duration.times(sampleRate).div(1000))
 
         val realDuration = duration * sampleRate / 1000
         val chopSize = freq / sampleRate
 
-        val amp = Math.max(4600f / freq, 1f)
-        val nHarmonics = if (freq >= 22050f) 1
-                         else if (freq >= 11025f) 2
-                         else if (freq >= 5512.5f) 3
-                         else if (freq >= 2756.25f) 4
-                         else if (freq >= 1378.125f) 5
-                         else if (freq >= 689.0625f) 6
+        val amp = Math.max(4600.0 / freq, 1.0)
+        val nHarmonics = if (freq >= 22050.0) 1
+                         else if (freq >= 11025.0) 2
+                         else if (freq >= 5512.5) 3
+                         else if (freq >= 2756.25) 4
+                         else if (freq >= 1378.125) 5
+                         else if (freq >= 689.0625) 6
                          else 7
 
-        val transitionThre = 974.47218f
+        val transitionThre = 974.47218
 
         // TODO volume ramping?
-        if (freq == 0f) {
+        if (freq == 0.0) {
             for (x in 0..realDuration - 1) {
                 audioData.put(0x00.toByte())
             }
         }
         else if (freq < transitionThre) { // chopper generator (for low freq)
             for (x in 0..realDuration - 1) {
-                var sine: Float = amp * FastMath.cos(FastMath.TWO_PI * x * chopSize)
-                if (sine > 0.79f) sine = 0.79f
-                else if (sine < -0.79f) sine = -0.79f
+                var sine: Double = amp * Math.cos(Math.PI * 2 * x * chopSize)
+                if (sine > 0.79) sine = 0.79
+                else if (sine < -0.79) sine = -0.79
                 audioData.put(
-                        (0.5f + 0.5f * sine).times(0xFF).roundInt().toByte()
+                        (0.5 + 0.5 * sine).times(0xFF).roundInt().toByte()
                 )
             }
         }
         else { // harmonics generator (for high freq)
             for (x in 0..realDuration - 1) {
-                var sine: Float = 0f
+                var sine: Double = 0.0
                 for (k in 1..nHarmonics) { // mix only odd harmonics in order to make a squarewave
-                    sine += FastMath.sin(FastMath.TWO_PI * (2*k - 1) * chopSize * x) / (2*k - 1)
+                    sine += Math.sin(Math.PI * 2 * (2*k - 1) * chopSize * x) / (2*k - 1)
                 }
                 audioData.put(
-                        (0.5f + 0.5f * sine).times(0xFF).roundInt().toByte()
+                        (0.5 + 0.5 * sine).times(0xFF).roundInt().toByte()
                 )
             }
         }
@@ -377,7 +414,7 @@ class BaseTerrarumComputer() {
         return audioData
     }
 
-    private fun playTone(leninmilli: Int, freq: Float) {
+    private fun playTone(leninmilli: Int, freq: Double) {
         audioData = makeAudioData(leninmilli, freq)
 
 
diff --git a/src/net/torvald/terrarum/virtualcomputer/luaapi/Http.kt b/src/net/torvald/terrarum/virtualcomputer/luaapi/Http.kt
deleted file mode 100644
index fa5efe605..000000000
--- a/src/net/torvald/terrarum/virtualcomputer/luaapi/Http.kt
+++ /dev/null
@@ -1,12 +0,0 @@
-package net.torvald.terrarum.virtualcomputer.luaapi
-
-import org.luaj.vm2.Globals
-import net.torvald.terrarum.virtualcomputer.computer.BaseTerrarumComputer
-
-/**
- * Provides internet access, if @param computer has internet card(s).
- *
- * Created by minjaesong on 16-09-24.
- */
-internal class Http(globals: Globals, computer: BaseTerrarumComputer) {
-}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/luaapi/Kukeiha.kt b/src/net/torvald/terrarum/virtualcomputer/luaapi/Kukeiha.kt
deleted file mode 100644
index cab81a03d..000000000
--- a/src/net/torvald/terrarum/virtualcomputer/luaapi/Kukeiha.kt
+++ /dev/null
@@ -1,9 +0,0 @@
-package net.torvald.terrarum.virtualcomputer.luaapi
-
-/**
- * Virtual driver for 4-track squarewave soundcard
- *
- * Created by minjaesong on 16-09-27.
- */
-class Kukeiha {
-}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/luaapi/PcSpeakerDriver.kt b/src/net/torvald/terrarum/virtualcomputer/luaapi/PcSpeakerDriver.kt
index b340c2000..322b0b59e 100644
--- a/src/net/torvald/terrarum/virtualcomputer/luaapi/PcSpeakerDriver.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/luaapi/PcSpeakerDriver.kt
@@ -6,23 +6,79 @@ import org.luaj.vm2.LuaValue
 import org.luaj.vm2.lib.TwoArgFunction
 import org.luaj.vm2.lib.ZeroArgFunction
 import net.torvald.terrarum.virtualcomputer.computer.BaseTerrarumComputer
+import org.luaj.vm2.lib.OneArgFunction
 
 /**
  * PC Speaker driver and arpeggiator (MONOTONE-style 4 channels)
  *
+ * Notes are tuned to A440, equal temperament. This is an ISO standard.
+ *
  * Created by minjaesong on 16-09-27.
  */
-class PcSpeakerDriver(globals: Globals, host: BaseTerrarumComputer) {
+class PcSpeakerDriver(val globals: Globals, host: BaseTerrarumComputer) {
 
     init {
         globals["speaker"] = LuaTable()
         globals["speaker"]["enqueue"] = EnqueueTone(host)
         globals["speaker"]["clear"] = ClearQueue(host)
+        globals["speaker"]["retune"] = Retune(globals)
+        globals["speaker"]["resetTune"] = ResetTune(globals)
+        globals["speaker"]["toFreq"] = StringToFrequency(globals)
+        globals["speaker"]["__basefreq__"] = LuaValue.valueOf(BASE_FREQ) // every other PSGs should use this very variable
+
+        // constants
+        //      e.g. speaker.A0 returns number 1
+        fun Int.toNote(): String = NOTE_NAMES[this % 12] + this.plus(8).div(12).toString()
+        fun Int.toNoteAlt(): String = NOTE_NAMES_ALT[this % 12] + this.plus(8).div(12).toString()
+
+        for (i in 1..126) {
+            globals["speaker"][i.toNote()] = i // sharps
+            globals["speaker"][i.toNoteAlt()] = i // flats
+        }
+    }
+
+    companion object {
+        val BASE_FREQ = 27.5 // frequency of A0
+        val NOTE_NAMES = arrayOf("GS", "A", "AS", "B", "C", "CS",
+                "D", "DS", "E", "F", "FS", "G")
+        val NOTE_NAMES_ALT = arrayOf("Ab", "A", "Bb", "B", "C", "Db",
+                "D", "Eb", "E", "F", "Gb", "G")
+
+        /** @param basefreq: Frequency of A-0 */
+        fun Int.toFreq(basefreq: Double): Double = basefreq * Math.pow(2.0, (this - 1.0) / 12.0)
+
+        /** @param "A-5", "B4", "C#5", ... */
+        fun String.toNoteIndex(): Int {
+            var notestr = this.replace("-", "")
+            notestr = notestr.replace("#", "S")
+
+            val baseNote = if (notestr.contains("S") || notestr.contains("b"))
+                notestr.substring(0, 2)
+            else
+                notestr.substring(0, 1)
+
+            var note: Int = NOTE_NAMES.indexOf(baseNote) // [0-11]
+            if (note < 0) note = NOTE_NAMES_ALT.indexOf(baseNote) // search again
+            if (note < 0) throw IllegalArgumentException("Unknown note: $this") // failed to search
+
+            val octave: Int = notestr.replace(Regex("""[^0-9]"""), "").toInt()
+            return octave.minus(if (note >= 4) 1 else 0) * 12 + note
+        }
     }
 
     class EnqueueTone(val host: BaseTerrarumComputer) : TwoArgFunction() {
+        /**
+         * @param freq: number (hertz) or string (A-4, A4, B#2, ...)
+         */
         override fun call(millisec: LuaValue, freq: LuaValue): LuaValue {
-            host.enqueueBeep(millisec.checkint(), freq.tofloat())
+            if (freq.isnumber())
+                host.enqueueBeep(millisec.checkint(), freq.checkdouble())
+            else {
+                host.enqueueBeep(millisec.checkint(),
+                        freq.checkjstring().toNoteIndex()
+                                .toFreq(host.luaJ_globals["speaker"]["__basefreq__"].checkdouble())
+                )
+            }
             return LuaValue.NONE
         }
     }
@@ -34,4 +90,53 @@ class PcSpeakerDriver(globals: Globals, host: BaseTerrarumComputer) {
         }
     }
 
+    class Retune(val globals: Globals) : OneArgFunction() {
+        /**
+         * Examples: C256, A440, A#440, ...
+         */
+        override fun call(arg: LuaValue): LuaValue {
+            val tuneName = arg.checkjstring()
+
+            val baseNote = if (tuneName.contains("#") || tuneName.contains("b")) tuneName.substring(0, 2) else tuneName.substring(0, 1)
+            val freq = tuneName.replace(Regex("""[^0-9]"""), "").toInt()
+
+            // we're assuming C4, C#4, ... A4, A#4, B4
+            val diffPivot = arrayOf(11, 12, 13, 14, 3, 4, 5, 6, 7, 8, 9, 10) // 2^(12 / n)
+            var diff = diffPivot[NOTE_NAMES.indexOf(baseNote)]
+            if (diff < 0) diff = diffPivot[NOTE_NAMES_ALT.indexOf(baseNote)] // search again
+            if (diff < 0) throw IllegalArgumentException("Unknown note: $baseNote") // failed to search
+
+            val exp = 12.0 / diff
+            val basefreq = freq * Math.pow(2.0, exp) / 32.0 // converts whatever baseNote to A0
+
+            globals["speaker"]["__basefreq__"] = basefreq
+            return LuaValue.NONE
+        }
+    }
+
+    class ResetTune(val globals: Globals) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            globals["speaker"]["__basefreq__"] = LuaValue.valueOf(BASE_FREQ)
+            return LuaValue.NONE
+        }
+    }
+
+    /**
+     * usage = speaker.toFreq(speaker.AS5) --'S' is a substitution for '#'
+     */
+    class StringToFrequency(val globals: Globals) : OneArgFunction() {
+        /**
+         * @param arg: number (note index) or string (A-4, A4, B#2, ...)
+         */
+        override fun call(arg: LuaValue): LuaValue {
+            val note = if (arg.isint()) arg.checkint()
+            else {
+                arg.checkjstring().toNoteIndex()
+            }
+            val basefreq = globals["speaker"]["__basefreq__"].checkdouble()
+
+            return LuaValue.valueOf(note.toFreq(basefreq))
+        }
+    }
+
 }
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/peripheral/Peripheral.kt b/src/net/torvald/terrarum/virtualcomputer/peripheral/Peripheral.kt
new file mode 100644
index 000000000..220e06e50
--- /dev/null
+++ b/src/net/torvald/terrarum/virtualcomputer/peripheral/Peripheral.kt
@@ -0,0 +1,20 @@
+package net.torvald.terrarum.virtualcomputer.peripheral
+
+import org.luaj.vm2.Globals
+import org.luaj.vm2.LuaTable
+import org.luaj.vm2.LuaValue
+
+/**
+ * Created by minjaesong on 16-09-29.
+ */
+open class Peripheral(val luaG: Globals, val tableName: String) {
+
+    open fun loadLib() {
+        luaG[tableName] = LuaTable()
+    }
+    open fun unloadLib() {
+        luaG[tableName] = LuaValue.NIL
+    }
+
+    override fun toString(): String = tableName
+}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/peripheral/PeripheralInternet.kt b/src/net/torvald/terrarum/virtualcomputer/peripheral/PeripheralInternet.kt
new file mode 100644
index 000000000..551a5d094
--- /dev/null
+++ b/src/net/torvald/terrarum/virtualcomputer/peripheral/PeripheralInternet.kt
@@ -0,0 +1,41 @@
+package net.torvald.terrarum.virtualcomputer.peripheral
+
+import org.luaj.vm2.Globals
+import net.torvald.terrarum.virtualcomputer.computer.BaseTerrarumComputer
+import org.luaj.vm2.LuaValue
+import org.luaj.vm2.lib.OneArgFunction
+import java.io.BufferedReader
+import java.io.InputStreamReader
+import java.net.URL
+
+/**
+ * Provides internet access.
+ *
+ * Created by minjaesong on 16-09-24.
+ */
+internal class PeripheralInternet(val globals: Globals, val host: BaseTerrarumComputer)
+: Peripheral(globals, "internet"){
+
+    override fun loadLib() {
+        super.loadLib()
+        globals["internet"]["fetch"] = FetchWebPage()
+    }
+
+    class FetchWebPage() : OneArgFunction() {
+        override fun call(urlstr: LuaValue): LuaValue {
+            val url = URL(urlstr.checkjstring())
+            val inputstream = BufferedReader(InputStreamReader(url.openStream()))
+
+            var inline = ""
+            var readline = inputstream.readLine()
+            while (readline != null) {
+                inline += readline
+                readline = inputstream.readLine()
+            }
+            inputstream.close()
+
+            return LuaValue.valueOf(inline)
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/peripheral/PeripheralPSG.kt b/src/net/torvald/terrarum/virtualcomputer/peripheral/PeripheralPSG.kt
new file mode 100644
index 000000000..56b05eea3
--- /dev/null
+++ b/src/net/torvald/terrarum/virtualcomputer/peripheral/PeripheralPSG.kt
@@ -0,0 +1,21 @@
+package net.torvald.terrarum.virtualcomputer.peripheral
+
+import net.torvald.terrarum.virtualcomputer.computer.BaseTerrarumComputer
+import org.luaj.vm2.Globals
+import org.luaj.vm2.LuaTable
+import org.luaj.vm2.LuaValue
+
+/**
+ * Virtual driver for 4-track squarewave PSG, which has no ability of changing a duty cycle
+ * but has a volume control
+ *
+ * Created by minjaesong on 16-09-27.
+ */
+internal class PeripheralPSG(val globals: Globals, val host: BaseTerrarumComputer)
+: Peripheral(globals, "psg") {
+
+    override fun loadLib() {
+        super.loadLib()
+    }
+
+}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/terminal/SimpleTextTerminal.kt b/src/net/torvald/terrarum/virtualcomputer/terminal/SimpleTextTerminal.kt
index c118a099f..c67c8fb5d 100644
--- a/src/net/torvald/terrarum/virtualcomputer/terminal/SimpleTextTerminal.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/terminal/SimpleTextTerminal.kt
@@ -318,7 +318,7 @@ open class SimpleTextTerminal(
      * @param duration: milliseconds
      * @param freg: Frequency (float)
      */
-    override fun emitTone(duration: Int, freq: Float) {
+    override fun emitTone(duration: Int, freq: Double) {
         // println("!! Beep playing row $beepCursor, d ${Math.min(duration, maxDuration)} f $freq")
         host.clearBeepQueue()
         host.enqueueBeep(duration, freq)
@@ -328,19 +328,19 @@ open class SimpleTextTerminal(
     override fun bell(pattern: String) {
         host.clearBeepQueue()
 
-        val freq: Float =
+        val freq: Double =
                 if (host.luaJ_globals["computer"]["bellpitch"].isnil())
-                    1000f
+                    1000.0
                 else
-                    host.luaJ_globals["computer"]["bellpitch"].checkdouble().toFloat()
+                    host.luaJ_globals["computer"]["bellpitch"].checkdouble()
 
         for (c in pattern) {
             when (c) {
-                '.' -> { host.enqueueBeep(80, freq);  host.enqueueBeep(50, 0f) }
-                '-' -> { host.enqueueBeep(200, freq); host.enqueueBeep(50, 0f) }
-                '=' -> { host.enqueueBeep(500, freq); host.enqueueBeep(50, 0f) }
-                ' ' -> { host.enqueueBeep(200, 0f) }
-                ',' -> { host.enqueueBeep(50, 0f) }
+                '.' -> { host.enqueueBeep(80, freq);  host.enqueueBeep(50, 0.0) }
+                '-' -> { host.enqueueBeep(200, freq); host.enqueueBeep(50, 0.0) }
+                '=' -> { host.enqueueBeep(500, freq); host.enqueueBeep(50, 0.0) }
+                ' ' -> { host.enqueueBeep(200, 0.0) }
+                ',' -> { host.enqueueBeep(50, 0.0) }
                 else -> throw IllegalArgumentException("Unacceptable pattern: $c (from '$pattern')")
             }
         }
diff --git a/src/net/torvald/terrarum/virtualcomputer/terminal/Terminal.kt b/src/net/torvald/terrarum/virtualcomputer/terminal/Terminal.kt
index a1c8c6a69..2cb379f5f 100644
--- a/src/net/torvald/terrarum/virtualcomputer/terminal/Terminal.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/terminal/Terminal.kt
@@ -61,7 +61,7 @@ interface Terminal : Teletype {
      * @param duration: milliseconds
      * @param freg: Frequency (float)
      */
-    fun emitTone(duration: Int, freq: Float)
+    fun emitTone(duration: Int, freq: Double)
 
     override fun bell(pattern: String)
     /** Requires keyPressed() event to be processed.
diff --git a/src/net/torvald/terrarum/virtualcomputer/worldobject/FixtureBasicTerminal.kt b/src/net/torvald/terrarum/virtualcomputer/worldobject/FixtureBasicTerminal.kt
index 737ef84b7..45b087e70 100644
--- a/src/net/torvald/terrarum/virtualcomputer/worldobject/FixtureBasicTerminal.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/worldobject/FixtureBasicTerminal.kt
@@ -14,7 +14,7 @@ import java.util.*
  */
 class FixtureBasicTerminal(phosphor: Color) : FixtureBase() {
 
-    val computer = BaseTerrarumComputer()
+    val computer = BaseTerrarumComputer(8)
     val vt: Terminal = SimpleTextTerminal(phosphor, 80, 25, computer)
     val ui = UITextTerminal(vt)
 
diff --git a/src/net/torvald/terrarum/virtualcomputer/worldobject/FixtureComputerBase.kt b/src/net/torvald/terrarum/virtualcomputer/worldobject/FixtureComputerBase.kt
index 4a9456247..f563148f2 100644
--- a/src/net/torvald/terrarum/virtualcomputer/worldobject/FixtureComputerBase.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/worldobject/FixtureComputerBase.kt
@@ -33,7 +33,7 @@ open class FixtureComputerBase() : FixtureBase() {
 
     fun attachTerminal(uuid: String) {
         val fetchedTerminal = getTerminalByUUID(uuid)
-        computerInside = BaseTerrarumComputer()
+        computerInside = BaseTerrarumComputer(8)
         computerInside!!.attachTerminal(fetchedTerminal!!)
         actorValue["computerid"] = computerInside!!.UUID
     }
diff --git a/work_files/monotone.ans b/work_files/monotone.ans
index d21ab5a64..f00e1963f 100644
--- a/work_files/monotone.ans
+++ b/work_files/monotone.ans
@@ -6,7 +6,7 @@
 °03°03°  °05°úúú úúú°F#5 úúú°úúú úúú°úúú úúú°\ Note offTAB Next channel
 °04°04°  °06°úúú úúú°A-5 úúú°úúú úúú°úúú úúú°
 °05°05°  °07°úúú úúú°G-5 úúú°G-5 úúú°úúú úúú°
-°06°06°  °08°úúú úúú°C-6 úúú°úúú úúú°úúú úúú°  ALT Select blockPAGE Move by 16 rows
+°06°06°  °08°úúú úúú°C-6 úúú°úúú úúú°úúú úúú°     Select blockPAGE Move by 16 rows
 °07°07°   09 úúú úúú E-6 úúú úúú úúú úúú úúú   ALT C Copy selectionHM/ED Move to top/bottom
 °08°08°  °0A°úúú úúú°C-5 úúú°=== úúú°úúú úúú°  ALT V Paste selection
 °09°09°  °0B°úúú úúú°úúú úúú°úúú úúú°úúú úúú°
@@ -28,42 +28,42 @@
 °19°19°  °1B°úúú úúú°úúú úúú°úúú úúú°úúú F20°
 °1A°1A°  °1C°úúú úúú°úúú úúú°úúú úúú°úúú úúú°
 °1B°1B°  °1D°úúú úúú°úúú úúú°úúú úúú°úúú úúú°
-°1C°1C°  °1E°úúú úúú°úúú úúú°G-3 úúú°úúú F03°    Effects
+°1C°1C°  °1E°úúú úúú°úúú úúú°G-3 úúú°úúú F03°      EffectsTranspose
 °1D°1D°  °1F°úúú úúú°úúú úúú°A-3 úúú°úúú úúú°
-°1E°1E°  °20°úúú úúú°úúú úúú°B-3 úúú°úúú úúú°0xy Arpeggio
-°1F°1E°  °21°úúú úúú°úúú úúú°C-4 úúú°úúú úúú°
-°20°1E°  °22°úúú úúú°úúú úúú°D-4 úúú°úúú úúú°1xx Portamento up
-°21°1F°  °23°úúú úúú°úúú úúú°E-4 úúú°úúú úúú°
-°úú°úú°  °24°úúú úúú°úúú úúú°F-4 úúú°úúú úúú°2xx Portamento down
+°1E°1E°  °20°úúú úúú°úúú úúú°B-3 úúú°úúú úúú°  0xy ArpeggioALT ] +12
+°1F°1E°  °21°úúú úúú°úúú úúú°C-4 úúú°úúú úúú°ALT [ -12
+°20°1E°  °22°úúú úúú°úúú úúú°D-4 úúú°úúú úúú°  1xx Portamento up
+°21°1F°  °23°úúú úúú°úúú úúú°E-4 úúú°úúú úúú°  ALT = +1
+°úú°úú°  °24°úúú úúú°úúú úúú°F-4 úúú°úúú úúú°  2xx Portamento down  ALT - -1
 °úú°úú°  °25°úúú úúú°úúú úúú°G-4 úúú°úúú úúú°
-°úú°úú°  °26°úúú úúú°úúú úúú°A-4 úúú°úúú úúú°3xx Portamento to note
+°úú°úú°  °26°úúú úúú°úúú úúú°A-4 úúú°úúú úúú°  3xx Portamento to note
 °úú°úú°  °27°úúú úúú°úúú úúú°B-4 úúú°úúú úúú°
-°úú°úú°  °28°úúú úúú°úúú úúú°C-5 úúú°úúú úúú°4xy Vibrato
+°úú°úú°  °28°úúú úúú°úúú úúú°C-5 úúú°úúú úúú°  4xy Vibrato
 °úú°úú°  °29°úúú úúú°úúú úúú°D-5 úúú°úúú úúú°
-°úú°úú°  °2A°úúú úúú°úúú úúú°E-5 úúú°úúú úúú°Bxx Jump to order
+°úú°úú°  °2A°úúú úúú°úúú úúú°E-5 úúú°úúú úúú°  Bxx Jump to order
 °úú°úú°  °2B°úúú úúú°úúú úúú°F-5 úúú°úúú úúú°
-°úú°úú°  °2C°úúú úúú°úúú úúú°G-5 úúú°úúú úúú°Dxx Pattern break
+°úú°úú°  °2C°úúú úúú°úúú úúú°G-5 úúú°úúú úúú°  Dxx Pattern break
 °úú°úú°  °2D°úúú úúú°úúú úúú°A-5 úúú°úúú úúú°
-°úú°úú°  °2E°úúú úúú°úúú úúú°B-5 úúú°úúú úúú°Fxx Set tick speed
+°úú°úú°  °2E°úúú úúú°úúú úúú°B-5 úúú°úúú úúú°  Fxx Set tick speed
 °úú°úú°  °2F°úúú úúú°úúú úúú°C-6 úúú°úúú úúú°
 °úú°úú°  °30°úúú úúú°úúú úúú°D-6 úúú°úúú úúú°
-°úú°úú°  °31°úúú úúú°úúú úúú°E-6 úúú°úúú úúú°  ±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±
-°úú°úú°  °32°úúú úúú°úúú úúú°F-6 úúú°úúú úúú°  ±±Ý ÞÝ Þ±±±Ý ÞÝ ÞÝ Þ±±±Ý ÞÝ Þ±±±Ý Þ±±±
-°úú°úú°  °33°úúú úúú°úúú úúú°G-6 úúú°úúú úúú°  ±±Ý2ÞÝ3Þ±±±Ý5ÞÝ6ÞÝ7Þ±±±Ý9ÞÝ0Þ±±±Ý=Þ±±±
-°úú°úú°  °34°úúú úúú°úúú úúú°A-6 úúú°úúú úúú°  ±±Ý ÞÝ Þ±±±Ý ÞÝ ÞÝ Þ±±±Ý ÞÝ Þ±±±Ý Þ±±±
-°úú°úú°  °35°úúú úúú°úúú úúú°B-6 D00°úúú úúú°  ±Ý ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ Þ±
-°úú°úú°  °36°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±ÝQÞÝWÞÝEÞÝRÞÝTÞÝYÞÝUÞÝIÞÝOÞÝPÞÝ{ÞÝ}Þ±
-°úú°úú°  °37°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±Ý ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ Þ±
-°úú°úú°  °38°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±
-°úú°úú°  °39°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±±±Ý ÞÝ Þ±±±Ý ÞÝ ÞÝ Þ±±±Ý ÞÝ Þ±±±±±±±±
-°úú°úú°  °3A°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±±±ÝSÞÝDÞ±±±ÝGÞÝHÞÝJÞ±±±ÝLÞÝ;Þ±±±±±±±±
-         °3B°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±±±Ý ÞÝ Þ±±±Ý ÞÝ ÞÝ Þ±±±Ý ÞÝ Þ±±±±±±±±
-°3C°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±±Ý ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ Þ±±±±±±
-RecPlay  °3D°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±±ÝZÞÝXÞÝCÞÝVÞÝBÞÝNÞÝMÞÝ,ÞÝ.ÞÝ/Þ±Oct±±
-Trcks 4  °3E°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±±Ý ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ Þ± -1±±
-Tick 00  °3F°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±
+°úú°úú°  °31°úúú úúú°úúú úúú°E-6 úúú°úúú úúú°  ±                                 ±
+°úú°úú°  °32°úúú úúú°úúú úúú°F-6 úúú°úúú úúú°  ± Ý ÞÝ Þ   Ý ÞÝ ÞÝ Þ   Ý ÞÝ Þ     ±
+°úú°úú°  °33°úúú úúú°úúú úúú°G-6 úúú°úúú úúú°  ± Ý2ÞÝ3Þ   Ý5ÞÝ6ÞÝ7Þ   Ý9ÞÝ0Þ  ÛÛÛ±
+°úú°úú°  °34°úúú úúú°úúú úúú°A-6 úúú°úúú úúú°  ± Ý ÞÝ Þ   Ý ÞÝ ÞÝ Þ   Ý ÞÝ Þ  ÛÛÛ±
+°úú°úú°  °35°úúú úúú°úúú úúú°B-6 D00°úúú úúú°  ±Ý ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÛÛÛ±
+°úú°úú°  °36°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±ÝQÞÝWÞÝEÞÝRÞÝTÞÝYÞÝUÞÝIÞÝOÞÝPÞ   ±
+°úú°úú°  °37°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±Ý ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ Þ   ±
+°úú°úú°  °38°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±                                 ±
+°úú°úú°  °39°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ± O  Ý ÞÝ Þ   Ý ÞÝ ÞÝ Þ   Ý ÞÝ Þ  ±
+°úú°úú°  °3A°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ± c  ÝSÞÝDÞ   ÝGÞÝHÞÝJÞ   ÝLÞÝ;Þ  ±
+         °3B°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ± t  Ý ÞÝ Þ   Ý ÞÝ ÞÝ Þ   Ý ÞÝ Þ  ±
+°3C°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±   Ý ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ Þ±
+RecPlay  °3D°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±-1 ÝZÞÝXÞÝCÞÝVÞÝBÞÝNÞÝMÞÝ,ÞÝ.ÞÝ/Þ±
+Trcks 4  °3E°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±   Ý ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ ÞÝ Þ±
+Tick 00  °3F°úúú úúú°úúú úúú°úúú úúú°úúú úúú°  ±                                 ±
 ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ
 RecPlay  RecPlay
 Trcks 4  Trcks 4  Editable
 Tick 00  Tick 00  Current play tick
-SAUCE00                                                                           20160924u~

dEIBM VGA50
\ No newline at end of file
+SAUCE00                                                                           20160924ø€

dEIBM VGA50
\ No newline at end of file
diff --git a/work_files/monotone.png b/work_files/monotone.png
index b3e19724a..56a6c677a 100644
Binary files a/work_files/monotone.png and b/work_files/monotone.png differ
diff --git a/work_files/romapidoc/api_filesystem.tex b/work_files/romapidoc/api_filesystem.tex
index bb9470d6b..38117614b 100644
--- a/work_files/romapidoc/api_filesystem.tex
+++ b/work_files/romapidoc/api_filesystem.tex
@@ -2,7 +2,7 @@ The Filesystem API provides functions for manipulating files and the filesystem.
 
 The path for the argument of functions blocks `\,.\,.\,' to be entered, preventing users from access outside of the computer and eliminating the potential of harming the real computer of the innocent players.
 
-\subsection{Functions}
+\section{Functions}
 
 \begin{tabularx}{\textwidth}{l l X}
 	\textbf{\large Function} & \textbf{\large Return} & \textbf{\large Description}
@@ -39,7 +39,7 @@ The path for the argument of functions blocks `\,.\,.\,' to be entered, preventi
 	fs.fetchText(\textbf{path}: string) & string & Opens the file on \textbf{path} and returns its contents as a plain text.
 \end{tabularx}
 
-\subsection{File Handler}
+\section{File Handler}
 
 When it comes to opening a file, there are six modes available---r, w, a, rb, wb, ab, each represents \textbf{r}ead, \textbf{w}rite, \textbf{a}ppend and \textbf{b}yte.
 
diff --git a/work_files/romapidoc/api_hexutils.tex b/work_files/romapidoc/api_hexutils.tex
index f83e6a711..f88bbc3d2 100644
--- a/work_files/romapidoc/api_hexutils.tex
+++ b/work_files/romapidoc/api_hexutils.tex
@@ -1,6 +1,6 @@
 The Hexutils library provides utility to convert byte value to hexadecimal string.
 
-\subsection{Functions}
+\section{Functions}
 
 \begin{tabularx}{\textwidth}{l l X}
 	\textbf{\large Function} & \textbf{\large Return} & \textbf{\large Description}
diff --git a/work_files/romapidoc/api_input.tex b/work_files/romapidoc/api_input.tex
index db8880b9c..00cc32304 100644
--- a/work_files/romapidoc/api_input.tex
+++ b/work_files/romapidoc/api_input.tex
@@ -1,6 +1,6 @@
 The Input API provides access to game's Input API to get input-related informations.
 
-\subsection{Functions}
+\section{Functions}
 
 \begin{tabularx}{\textwidth}{l l X}
 	\textbf{\large Function} & \textbf{\large Return} & \textbf{\large Description}
diff --git a/work_files/romapidoc/api_keys.tex b/work_files/romapidoc/api_keys.tex
index 51383c119..136359d8d 100644
--- a/work_files/romapidoc/api_keys.tex
+++ b/work_files/romapidoc/api_keys.tex
@@ -11,7 +11,7 @@ Notes on compatibility with ComputerCraft: although this library is ComputerCraf
 	keys.getName(keycode: int) & string & Returns key name corresponds to the keycode.
 \end{tabularx}
 
-\subsection{Accepted Key Names}
+\section{Accepted Key Names}
 
 \emph{NOTE: following sets are considered as the same keys.}
 
diff --git a/work_files/romapidoc/api_machine.tex b/work_files/romapidoc/api_machine.tex
index 3ee52eff3..b83f316bb 100644
--- a/work_files/romapidoc/api_machine.tex
+++ b/work_files/romapidoc/api_machine.tex
@@ -1,4 +1,4 @@
-The Machine API provides means to control the machine itself.
+The Machine API provides means to control the host machine.
 
 \begin{tabularx}{\textwidth}{l l X}
 	\textbf{\large Function} & \textbf{\large Return} & \textbf{\large Description}
diff --git a/work_files/romapidoc/api_os.tex b/work_files/romapidoc/api_os.tex
index d5939531c..03d07e893 100644
--- a/work_files/romapidoc/api_os.tex
+++ b/work_files/romapidoc/api_os.tex
@@ -9,7 +9,7 @@ The OS library provides functions and constants for the system. Most of the func
 	os.date(format: string) & string & Returns world's current time in desired format, or default if no arguments are provided. NOTE: displaying different time is not possible; Lua's TIME\_T is only 32 bit, world's history can be much longer.
 \end{tabularx}
 
-\subsection{Date Format String}
+\section{Date Format String}
 
 \begin{tabularx}{\textwidth}{c X c X}
 	\textbf{\large } & \textbf{\large Description} & \textbf{\large } & \textbf{\large Description}
diff --git a/work_files/romapidoc/api_security.tex b/work_files/romapidoc/api_security.tex
index 6f3a0a3a8..9e39286d0 100644
--- a/work_files/romapidoc/api_security.tex
+++ b/work_files/romapidoc/api_security.tex
@@ -1,6 +1,6 @@
 The Serurity API provides functions for security purposes, such as hashing and CSPRNG\footnote{Cryptographically secure psuedo-random number generator}.
 
-\subsection{Functions}
+\section{Functions}
 
 \begin{tabularx}{\textwidth}{l l X}
 	\textbf{\large Function} & \textbf{\large Return} & \textbf{\large Description}
diff --git a/work_files/romapidoc/api_speaker.tex b/work_files/romapidoc/api_speaker.tex
index 38463294b..824d577cd 100644
--- a/work_files/romapidoc/api_speaker.tex
+++ b/work_files/romapidoc/api_speaker.tex
@@ -4,7 +4,8 @@ The Speaker API provides means to control computer's built-in beeper speaker.
 	\textbf{\large Function} & \textbf{\large Return} & \textbf{\large Description}
 	\\ \\
 	\endhead
-	speaker.enqueue(len: int, freq: num) & nil & Enqueues speaker driving information. Queues will be started automatically.
+	speaker.enqueue(len: int, freq: num\footnote{Frequency in hertz (double) or the name of the note (``A-5'', ``B3'', ``F\#2'', ``Db6'', \ldots)}) & nil & Enqueues speaker driving information. Queues will be started automatically.
 	\\ \\
 	speaker.clear() & nil & Clears speaker queue.
+	\\ \\
 \end{tabularx}
\ No newline at end of file
diff --git a/work_files/romapidoc/api_terminal.tex b/work_files/romapidoc/api_terminal.tex
index 18ee91795..49607d97c 100644
--- a/work_files/romapidoc/api_terminal.tex
+++ b/work_files/romapidoc/api_terminal.tex
@@ -1,6 +1,6 @@
 The Terminal API provides functions for sending text to the terminals, and drawing text-mode graphics. The API expects connected terminal to use Codepage 437. See section \emph{Codepage} for details.
 
-\subsection{Functions}
+\section{Functions}
 
 Note: cursor coordinates starts from one, not zero.
 
@@ -67,7 +67,7 @@ Note: cursor coordinates starts from one, not zero.
 	term.backCol() & int & Returns current background colour.
 \end{tabularx}
 
-\subsection{Standard Colours}
+\section{Standard Colours}
 
 \begin{tabularx}{\textwidth}{c l c l c l c l}
 	0 & \textcolor{black}{Black} & 1 & White & 2 & \textcolor{dimgrey}{Dim grey} & 3 & \textcolor{brightgrey}{Bright grey}
@@ -81,7 +81,7 @@ Note: cursor coordinates starts from one, not zero.
 
 Non-colour terminals support colour index of 0--3.
 
-\subsection{Codepage}
+\section{Codepage}
 
 \newlength{\cpimagew}
 \setlength{\cpimagew}{\linewidth}
@@ -91,7 +91,7 @@ Non-colour terminals support colour index of 0--3.
 
 Character 0x9E (currency symbol) and 0xFA (middle dot) can be accessed with following Lua constants: \emph{MONEY} and \emph{MIDDOT}. See \emph{Lua Globals} > \emph{Constants} section.
 
-\subsection{Accepted Control Sequences}
+\section{Accepted Control Sequences}
 
 \begin{tabularx}{\textwidth}{c X c X}
 	\textbf{\large No.} & \textbf{\large Description} & \textbf{\large No.} & \textbf{\large Description}
diff --git a/work_files/romapidoc/cc_bit.tex b/work_files/romapidoc/cc_bit.tex
index 6f221dcca..0d23fbf53 100644
--- a/work_files/romapidoc/cc_bit.tex
+++ b/work_files/romapidoc/cc_bit.tex
@@ -1,6 +1,6 @@
 The Bit API is for manipulating numbers using bitwise binary operations. The ROMBASIC already comes with Lua's bit32 library so make sure to use that for your casual usage.
 
-\subsection{Functions}
+\section{Functions}
 
 \begin{tabularx}{\textwidth}{l X}
 	\textbf{\large Function} & \textbf{\large Notes}
diff --git a/work_files/romapidoc/cc_colors.tex b/work_files/romapidoc/cc_colors.tex
index 67ed6e627..0e8d38be0 100644
--- a/work_files/romapidoc/cc_colors.tex
+++ b/work_files/romapidoc/cc_colors.tex
@@ -1,6 +1,6 @@
 The Colors API allows you to manipulate sets of colors. This is useful in colors on Advanced Computers and Advanced Monitors. British spellings are also supported.
 
-\subsection{Constants}
+\section{Constants}
 
 When the colours are used in ComputerCraft's Term API, nearest console colours will be used. Below is the table of colours coded with their substitutions.
 
@@ -16,6 +16,6 @@ When the colours are used in ComputerCraft's Term API, nearest console colours w
 
 Note that pink is understood as \textcolor{tan}{tan} when it is used, lightBlue and cyan are merged to \textcolor{cyan}{cyan}.
 
-\subsection{Functions}
+\section{Functions}
 
 All three functions are not supported, as there is no bundled cable thus there is no use of them.
\ No newline at end of file
diff --git a/work_files/romapidoc/luaglobals.tex b/work_files/romapidoc/luaglobals.tex
index 3c48d9d17..8ea2470c4 100644
--- a/work_files/romapidoc/luaglobals.tex
+++ b/work_files/romapidoc/luaglobals.tex
@@ -1,6 +1,6 @@
 ROMBASIC adds global functions and constants for operability.
 
-\subsection{Functions}
+\section{Functions}
 
 \begin{tabularx}{\textwidth}{l l X}
 	\textbf{\large Function} & \textbf{\large Return} & \textbf{\large Description}
@@ -15,7 +15,7 @@ ROMBASIC adds global functions and constants for operability.
 	computer.freeMemory() & int & Returns the amount of free memory on the computer.
 \end{tabularx}
 
-\subsection{Constants}
+\section{Constants}
 
 \begin{tabularx}{\textwidth}{l l X}
 	\textbf{\large Name} & \textbf{\large Type} & \textbf{\large Description}
@@ -54,7 +54,7 @@ ROMBASIC adds global functions and constants for operability.
 	computer.emitTone(\textbf{len}, \textbf{freq}) & nil & Generates square wave. \textbf{len} is integer, in milliseconds, \textbf{freq} is number, in Hertz.
 \end{tabularx}
 
-\subsection{Bell Codes}
+\section{Bell Codes}
 
 Bell Codes are patterns for driving bell/beeper. Each code is followed by short break of 50 milliseconds.
 
diff --git a/work_files/romapidoc/peri_lp.tex b/work_files/romapidoc/peri_lp.tex
index 53c164e8d..fbcf46052 100644
--- a/work_files/romapidoc/peri_lp.tex
+++ b/work_files/romapidoc/peri_lp.tex
@@ -2,7 +2,7 @@ The line printer is a printer that operates on line basis. It only prints text i
 
 Line printers do not work indefinitely; ignoring the obvious depletion of ink, belt for loading paper will be out of service on about 50 000 lines of printing, give or take a few, or paper will jam if the printer had struck with the unluckiness.
 
-\subsection{Functions}
+\section{Functions}
 
 \begin{tabularx}{\textwidth}{l l X}
 	\textbf{\large Function} & \textbf{\large Return} & \textbf{\large Description}
diff --git a/work_files/romapidoc/romapidoc.aux b/work_files/romapidoc/romapidoc.aux
index a29ce1b79..fe3a2cfb4 100644
--- a/work_files/romapidoc/romapidoc.aux
+++ b/work_files/romapidoc/romapidoc.aux
@@ -17,37 +17,43 @@
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-\@writefile{toc}{\contentsline {chapter}{\chapternumberline {1}APIs and Libraries}{5}{chapter.1}}
+\@writefile{toc}{\contentsline {part}{\partnumberline {I}APIs and Libraries}{5}{part.1}}
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     {2}{155.06007pt}\LT@entry 
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-\@writefile{toc}{\contentsline {subsection}{\numberline {1.1.1}Functions}{6}{subsection.1.1.1}}
+\@writefile{lof}{\addvspace {10pt}}
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+\@writefile{toc}{\contentsline {section}{\numberline {1.1}Functions}{6}{section.1.1}}
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+\@writefile{toc}{\contentsline {section}{\numberline {1.2}File Handler}{7}{section.1.2}}
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+\@writefile{toc}{\contentsline {chapter}{\chapternumberline {2}Hexutils}{9}{chapter.2}}
+\@writefile{toc}{\contentsline {section}{\numberline {2.1}Functions}{9}{section.2.1}}
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-\@writefile{toc}{\contentsline {subsection}{\numberline {1.3.1}Functions}{10}{subsection.1.3.1}}
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+\@writefile{toc}{\contentsline {chapter}{\chapternumberline {3}Input}{10}{chapter.3}}
+\@writefile{toc}{\contentsline {section}{\numberline {3.1}Functions}{10}{section.3.1}}
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-\@writefile{toc}{\contentsline {subsection}{\numberline {1.4.1}Accepted Key Names}{11}{subsection.1.4.1}}
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@@ -57,30 +63,40 @@
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-\@writefile{toc}{\contentsline {subsection}{\numberline {1.5.1}Date Format String}{12}{subsection.1.5.1}}
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+\@writefile{toc}{\contentsline {chapter}{\chapternumberline {5}OS}{13}{chapter.5}}
+\@writefile{toc}{\contentsline {section}{\numberline {5.1}Date Format String}{13}{section.5.1}}
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@@ -90,14 +106,14 @@
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+\@writefile{toc}{\contentsline {section}{\numberline {9.2}Standard Colours}{20}{section.9.2}}
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-\@writefile{toc}{\contentsline {subsection}{\numberline {1.9.4}Accepted Control Sequences}{19}{subsection.1.9.4}}
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 \gdef \LT@xiv {\LT@entry 
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diff --git a/work_files/romapidoc/romapidoc.log b/work_files/romapidoc/romapidoc.log
index 60e8bbc38..b47ad5288 100644
--- a/work_files/romapidoc/romapidoc.log
+++ b/work_files/romapidoc/romapidoc.log
@@ -1,4 +1,4 @@
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+This is LuaTeX, Version beta-0.80.0 (TeX Live 2015) (rev 5238)  (format=lualatex 2015.10.5)  29 SEP 2016 19:27
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 at position 1 in 'pre_linebreak_filter'
 luatexbase-mcb: inserting 'luaotfload.node_processor'
@@ -1224,7 +1224,7 @@ File: tasks.cfg 2014/07/29 v0.10a tasks instances
 . Defining command \settasks with sig. 'm' on line 710.
 .................................................
 )
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 File: puenc.def 2012/11/06 v6.83m Hyperref: PDF Unicode definition (HO)
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 Package: nameref 2012/10/27 v2.43 Cross-referencing by name of section
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 Redoing nameref's sectioning
 Redoing nameref's label
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-LaTeX Info: Redefining \ref on input line 87.
-LaTeX Info: Redefining \pageref on input line 87.
-LaTeX Info: Redefining \nameref on input line 87.
+LaTeX Info: Redefining \nameref on input line 93.
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+LaTeX Info: Redefining \pageref on input line 93.
+LaTeX Info: Redefining \nameref on input line 93.
 (./romapidoc.out) (./romapidoc.out)
 \@outlinefile=\write4
 
@@ -1375,11 +1375,11 @@ luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-It.otf"
 luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Regular.otf"
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 luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Bold.otf" (./romapid
 oc.toc
 luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Bold.otf"
+luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Bold.otf"
 luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Regular.otf"
 luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Regular.otf"
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+(Font)              Font shape `EU2/MyriadPro(0)/m/it' tried instead on input li
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+luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-It.otf"
+luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-It.otf" [4]
+luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Regular.otf"
+luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Bold.otf" [5
 
 ]
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-luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Bold.otf"
 (./api_filesystem.tex
+luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Regular.otf"
 luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Bold.otf"
-luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-It.otf"
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-luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-It.otf" [6
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 ] [7]) [8] (./api_hexutils.tex
@@ -1439,6 +1439,7 @@ Underfull \hbox (badness 4792) in paragraph at lines 10--10
 
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 \EU2/MyriadPro(0)/m/n/10 By com-bin-ing with ‘and’ or ‘or’
@@ -1451,6 +1452,7 @@ Underfull \hbox (badness 3884) in paragraph at lines 12--12
 
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 [][]\EU2/MyriadPro(0)/m/n/10 Notes on com-pat-i-bil-ity with Com-put-er-Craft: 
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+
+]
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 Underfull \hbox (badness 10000) in paragraph at lines 33--33
 [][]|\EU2/MyriadPro(0)/m/n/10 Short month name. (e.g.
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-) [12
+[13
 
-] (./api_security.tex
+
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@@ -1537,16 +1541,28 @@ Underfull \hbox (badness 2707) in paragraph at lines 20--20
 [][]|\EU2/MyriadPro(0)/m/n/10 En-codes in-put string as Base64
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-) [13
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-] (./api_shell.tex) [14
 
 ] (./api_speaker.tex
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+Overfull \hbox (0.686pt too wide) in alignment at lines 11--11
+ [] [] [] 
+ []
+
+
+Underfull \hbox (badness 1577) in paragraph at lines 11--11
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-) [15
+
+Package longtable Warning: Column widths have changed
+(longtable)                in table 8.1 on input line 11.
+
+) [17
+
 
 ] (./api_terminal.tex
 Underfull \hbox (badness 2165) in paragraph at lines 68--68
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 [][]|\EU2/MyriadPro(0)/m/n/10 Re-turns cur-rent back-ground
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-[16
+[18
 
-] [17]
+
+] [19]
 \cpimagew=\skip279
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 File: mda.png Graphic file (type png)
  <use mda.png>
 Package pdftex.def Info: mda.png used on input line 90.
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- [18]
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-) [19<./mda.png>] (./luaglobals.tex
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 Underfull \hbox (badness 1092) in paragraph at lines 16--16
 \EU2/MyriadPro(0)/m/n/10 ory in-stalled in the com-puter, in
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@@ -1628,73 +1645,80 @@ Underfull \hbox (badness 2591) in paragraph at lines 55--55
 \EU2/MyriadPro(0)/m/n/10 change fore-ground colour to dim
  []
 
-[20
+[22
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+
 
 ]
-Underfull \vbox (badness 10000) has occurred while \output is active []
-
- [21])
-(./luadifferences.tex) [22] (./api_machine.tex) [23
-
-] [24
+luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Bold.otf" [26
 
 ]
-luaotfload | load : Lookup/name: "MyriadPro" -> "MyriadPro-Bold.otf" [25] (./cc
-_bit.tex)
-[26
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-] (./cc_colors.tex) [27
+] (./cc_colors.tex) [28
 
-] [28
 
 ] [29
 
+
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-] [31] [32
+
+] [31
+
+] [32
+
+] (./peri_lp.tex)
+[33
 
 
-] [33] (./peri_lp.tex)
-[34
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-
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+
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diff --git a/work_files/romapidoc/romapidoc.out b/work_files/romapidoc/romapidoc.out
index 1d301f59f..2bc5fc660 100644
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+\BOOKMARK [1][-]{section.12.1}{\376\377\000F\000u\000n\000c\000t\000i\000o\000n\000s}{chapter.12}% 29
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diff --git a/work_files/romapidoc/romapidoc.pdf b/work_files/romapidoc/romapidoc.pdf
index b6d17c886..a573db27a 100644
Binary files a/work_files/romapidoc/romapidoc.pdf and b/work_files/romapidoc/romapidoc.pdf differ
diff --git a/work_files/romapidoc/romapidoc.synctex.gz b/work_files/romapidoc/romapidoc.synctex.gz
index bef1d1d02..8b1c52bf6 100644
Binary files a/work_files/romapidoc/romapidoc.synctex.gz and b/work_files/romapidoc/romapidoc.synctex.gz differ
diff --git a/work_files/romapidoc/romapidoc.tex b/work_files/romapidoc/romapidoc.tex
index 915f02b5e..948b71ccd 100644
--- a/work_files/romapidoc/romapidoc.tex
+++ b/work_files/romapidoc/romapidoc.tex
@@ -1,6 +1,6 @@
 % !TEX TS-program = lualatex
 
-\documentclass[10pt, stock]{memoir}
+\documentclass[10pt, stock, openany]{memoir}
 
 
 \usepackage{fontspec}
@@ -29,15 +29,6 @@
 
 
 
-\aliaspagestyle{part}{empty}
-\aliaspagestyle{chapter}{empty}
-\makeatletter
-\renewcommand\memendofchapterhook{%
-  \clearpage\m@mindentafterchapter\@afterheading}
-\makeatother
-
-
-
 \definecolor{black}{HTML}{000000}
 \definecolor{white}{HTML}{FFFFFF}
 \definecolor{dimgrey}{HTML}{555555}
@@ -68,8 +59,23 @@
 \posttitle{\par\end{flushright}\vskip 0.5em}
 
 % new sections are new page
-\let\oldsection\section
-\renewcommand\section{\clearpage\oldsection}
+\let\oldsection\chapter
+\renewcommand\chapter{\clearpage\oldsection}
+
+% chapter title -- no now page after
+\renewcommand\chapterheadstart{} % kill the drop
+\renewcommand\afterchapternum{\vskip 0.5em} % space between number and title
+\makeatletter
+\renewcommand\memendofchapterhook{%
+\m@mindentafterchapter\@afterheading}
+\makeatother
+
+
+\renewcommand{\thefootnote}{\fnsymbol{footnote}}
+
+
+\aliaspagestyle{part}{empty}
+\aliaspagestyle{chapter}{empty}
 
 
 % The title
@@ -95,70 +101,73 @@
 
 
 
-\chapter{APIs and Libraries}
+\part{APIs and Libraries}
 
-\section{Filesystem}
+\chapter{Filesystem}
 \input{api_filesystem}
 
-\section{Hexutils}
+\chapter{Hexutils}
 \input{api_hexutils}
 
-\section{Input}
+\chapter{Input}
 \input{api_input}
 
-\section{Keys}
+\chapter{Keys}
 \input{api_keys}
 
-\section{OS}
+\chapter{OS}
 \input{api_os}
 
-\section{Security}
+\chapter{Security}
 \input{api_security}
 
-\section{Shell}
+\chapter{Shell}
 \input{api_shell}
 
-\section{Speaker}
+\chapter{Speaker}
 \input{api_speaker}
 
-\section{Terminal}
+\chapter{Terminal}
 \input{api_terminal}
 
-\section{Lua Globals}
+\chapter{Lua Globals}
 \input{luaglobals}
 \subsection{Changes from Generic Lua Environment}
 \input{luadifferences}
 
-\section{Machine}
+\chapter{Machine}
 \input{api_machine}
 
 
-\chapter[Compatibility Layers---ComputerCraft]{{\LARGE Compatibility Layers} \\ ComputerCraft}
+\part[Compatibility Layers---ComputerCraft]{{\LARGE Compatibility Layers} \\ ComputerCraft}
 
-\section{Bit}
+\chapter{Bit}
 \input{cc_bit}
 
-\section{Colors}
+\chapter{Colors}
 \input{cc_colors}
 
-\section{Term}
+\chapter{Term}
 
-\section{Filesystem}
+\chapter{Filesystem}
 
 
 
-\chapter[Compatibility Layers---OpenComputers]{{\LARGE Compatibility Layers} \\ OpenComputers}
+\part[Compatibility Layers---OpenComputers]{{\LARGE Compatibility Layers} \\ OpenComputers}
 
 
 
-\chapter{Peripherals}
+\part{Peripherals}
 
-\section{Line Printer}
+\chapter{Line Printer}
 \input{peri_lp}
 
+\chapter{PSG}
+%\input{peri_psg}
 
 
-\chapter{References}
+
+\part{References}
 
 Some of the texts are taken from following sources:
 
diff --git a/work_files/romapidoc/romapidoc.toc b/work_files/romapidoc/romapidoc.toc
index ff10f2b30..b3f6be86a 100644
--- a/work_files/romapidoc/romapidoc.toc
+++ b/work_files/romapidoc/romapidoc.toc
@@ -1,40 +1,41 @@
-\contentsline {chapter}{\chapternumberline {1}APIs and Libraries}{5}{chapter.1}
-\contentsline {section}{\numberline {1.1}Filesystem}{6}{section.1.1}
-\contentsline {subsection}{\numberline {1.1.1}Functions}{6}{subsection.1.1.1}
-\contentsline {subsection}{\numberline {1.1.2}File Handler}{7}{subsection.1.1.2}
-\contentsline {section}{\numberline {1.2}Hexutils}{9}{section.1.2}
-\contentsline {subsection}{\numberline {1.2.1}Functions}{9}{subsection.1.2.1}
-\contentsline {section}{\numberline {1.3}Input}{10}{section.1.3}
-\contentsline {subsection}{\numberline {1.3.1}Functions}{10}{subsection.1.3.1}
-\contentsline {section}{\numberline {1.4}Keys}{11}{section.1.4}
-\contentsline {subsection}{\numberline {1.4.1}Accepted Key Names}{11}{subsection.1.4.1}
-\contentsline {section}{\numberline {1.5}OS}{12}{section.1.5}
-\contentsline {subsection}{\numberline {1.5.1}Date Format String}{12}{subsection.1.5.1}
-\contentsline {section}{\numberline {1.6}Security}{13}{section.1.6}
-\contentsline {subsection}{\numberline {1.6.1}Functions}{13}{subsection.1.6.1}
-\contentsline {section}{\numberline {1.7}Shell}{14}{section.1.7}
-\contentsline {section}{\numberline {1.8}Speaker}{15}{section.1.8}
-\contentsline {section}{\numberline {1.9}Terminal}{16}{section.1.9}
-\contentsline {subsection}{\numberline {1.9.1}Functions}{16}{subsection.1.9.1}
-\contentsline {subsection}{\numberline {1.9.2}Standard Colours}{18}{subsection.1.9.2}
-\contentsline {subsection}{\numberline {1.9.3}Codepage}{19}{subsection.1.9.3}
-\contentsline {subsection}{\numberline {1.9.4}Accepted Control Sequences}{19}{subsection.1.9.4}
-\contentsline {section}{\numberline {1.10}Lua Globals}{20}{section.1.10}
-\contentsline {subsection}{\numberline {1.10.1}Functions}{20}{subsection.1.10.1}
-\contentsline {subsection}{\numberline {1.10.2}Constants}{20}{subsection.1.10.2}
-\contentsline {subsection}{\numberline {1.10.3}Bell Codes}{22}{subsection.1.10.3}
-\contentsline {subsection}{\numberline {1.10.4}Changes from Generic Lua Environment}{22}{subsection.1.10.4}
-\contentsline {section}{\numberline {1.11}Machine}{23}{section.1.11}
-\contentsline {chapter}{\chapternumberline {2}Compatibility Layers---ComputerCraft}{25}{chapter.2}
-\contentsline {section}{\numberline {2.1}Bit}{26}{section.2.1}
-\contentsline {subsection}{\numberline {2.1.1}Functions}{26}{subsection.2.1.1}
-\contentsline {section}{\numberline {2.2}Colors}{27}{section.2.2}
-\contentsline {subsection}{\numberline {2.2.1}Constants}{27}{subsection.2.2.1}
-\contentsline {subsection}{\numberline {2.2.2}Functions}{27}{subsection.2.2.2}
-\contentsline {section}{\numberline {2.3}Term}{28}{section.2.3}
-\contentsline {section}{\numberline {2.4}Filesystem}{29}{section.2.4}
-\contentsline {chapter}{\chapternumberline {3}Compatibility Layers---OpenComputers}{31}{chapter.3}
-\contentsline {chapter}{\chapternumberline {4}Peripherals}{33}{chapter.4}
-\contentsline {section}{\numberline {4.1}Line Printer}{34}{section.4.1}
-\contentsline {subsection}{\numberline {4.1.1}Functions}{34}{subsection.4.1.1}
-\contentsline {chapter}{\chapternumberline {5}References}{35}{chapter.5}
+\contentsline {part}{\partnumberline {I}APIs and Libraries}{5}{part.1}
+\contentsline {chapter}{\chapternumberline {1}Filesystem}{6}{chapter.1}
+\contentsline {section}{\numberline {1.1}Functions}{6}{section.1.1}
+\contentsline {section}{\numberline {1.2}File Handler}{7}{section.1.2}
+\contentsline {chapter}{\chapternumberline {2}Hexutils}{9}{chapter.2}
+\contentsline {section}{\numberline {2.1}Functions}{9}{section.2.1}
+\contentsline {chapter}{\chapternumberline {3}Input}{10}{chapter.3}
+\contentsline {section}{\numberline {3.1}Functions}{10}{section.3.1}
+\contentsline {chapter}{\chapternumberline {4}Keys}{11}{chapter.4}
+\contentsline {section}{\numberline {4.1}Accepted Key Names}{11}{section.4.1}
+\contentsline {chapter}{\chapternumberline {5}OS}{13}{chapter.5}
+\contentsline {section}{\numberline {5.1}Date Format String}{13}{section.5.1}
+\contentsline {chapter}{\chapternumberline {6}Security}{15}{chapter.6}
+\contentsline {section}{\numberline {6.1}Functions}{15}{section.6.1}
+\contentsline {chapter}{\chapternumberline {7}Shell}{16}{chapter.7}
+\contentsline {chapter}{\chapternumberline {8}Speaker}{17}{chapter.8}
+\contentsline {chapter}{\chapternumberline {9}Terminal}{18}{chapter.9}
+\contentsline {section}{\numberline {9.1}Functions}{18}{section.9.1}
+\contentsline {section}{\numberline {9.2}Standard Colours}{20}{section.9.2}
+\contentsline {section}{\numberline {9.3}Codepage}{21}{section.9.3}
+\contentsline {section}{\numberline {9.4}Accepted Control Sequences}{21}{section.9.4}
+\contentsline {chapter}{\chapternumberline {10}Lua Globals}{22}{chapter.10}
+\contentsline {section}{\numberline {10.1}Functions}{22}{section.10.1}
+\contentsline {section}{\numberline {10.2}Constants}{22}{section.10.2}
+\contentsline {section}{\numberline {10.3}Bell Codes}{24}{section.10.3}
+\contentsline {subsection}{\numberline {10.3.1}Changes from Generic Lua Environment}{24}{subsection.10.3.1}
+\contentsline {chapter}{\chapternumberline {11}Machine}{25}{chapter.11}
+\contentsline {part}{\partnumberline {II}Compatibility Layers---ComputerCraft}{26}{part.2}
+\contentsline {chapter}{\chapternumberline {12}Bit}{27}{chapter.12}
+\contentsline {section}{\numberline {12.1}Functions}{27}{section.12.1}
+\contentsline {chapter}{\chapternumberline {13}Colors}{28}{chapter.13}
+\contentsline {section}{\numberline {13.1}Constants}{28}{section.13.1}
+\contentsline {section}{\numberline {13.2}Functions}{28}{section.13.2}
+\contentsline {chapter}{\chapternumberline {14}Term}{29}{chapter.14}
+\contentsline {chapter}{\chapternumberline {15}Filesystem}{30}{chapter.15}
+\contentsline {part}{\partnumberline {III}Compatibility Layers---OpenComputers}{31}{part.3}
+\contentsline {part}{\partnumberline {IV}Peripherals}{32}{part.4}
+\contentsline {chapter}{\chapternumberline {16}Line Printer}{33}{chapter.16}
+\contentsline {section}{\numberline {16.1}Functions}{33}{section.16.1}
+\contentsline {chapter}{\chapternumberline {17}PSG}{34}{chapter.17}
+\contentsline {part}{\partnumberline {V}References}{35}{part.5}