diff --git a/assets/graphics/fonts/cp949.png b/assets/graphics/fonts/cp949.png
new file mode 100644
index 000000000..e2f92440e
Binary files /dev/null and b/assets/graphics/fonts/cp949.png differ
diff --git a/assets/graphics/fonts/cp949.png.0.png b/assets/graphics/fonts/cp949.png.0.png
new file mode 100644
index 000000000..0fced4be2
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.0.png differ
diff --git a/assets/graphics/fonts/cp949.png.1.png b/assets/graphics/fonts/cp949.png.1.png
new file mode 100644
index 000000000..188d086b8
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.1.png differ
diff --git a/assets/graphics/fonts/cp949.png.10.png b/assets/graphics/fonts/cp949.png.10.png
new file mode 100644
index 000000000..4edc106f9
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.10.png differ
diff --git a/assets/graphics/fonts/cp949.png.11.png b/assets/graphics/fonts/cp949.png.11.png
new file mode 100644
index 000000000..b801aefbf
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.11.png differ
diff --git a/assets/graphics/fonts/cp949.png.12.png b/assets/graphics/fonts/cp949.png.12.png
new file mode 100644
index 000000000..5c95dfc60
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.12.png differ
diff --git a/assets/graphics/fonts/cp949.png.13.png b/assets/graphics/fonts/cp949.png.13.png
new file mode 100644
index 000000000..d5a874c2f
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.13.png differ
diff --git a/assets/graphics/fonts/cp949.png.14.png b/assets/graphics/fonts/cp949.png.14.png
new file mode 100644
index 000000000..624dc8019
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.14.png differ
diff --git a/assets/graphics/fonts/cp949.png.15.png b/assets/graphics/fonts/cp949.png.15.png
new file mode 100644
index 000000000..4c563987a
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.15.png differ
diff --git a/assets/graphics/fonts/cp949.png.2.png b/assets/graphics/fonts/cp949.png.2.png
new file mode 100644
index 000000000..fc39abdde
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.2.png differ
diff --git a/assets/graphics/fonts/cp949.png.3.png b/assets/graphics/fonts/cp949.png.3.png
new file mode 100644
index 000000000..2c4ff9619
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.3.png differ
diff --git a/assets/graphics/fonts/cp949.png.4.png b/assets/graphics/fonts/cp949.png.4.png
new file mode 100644
index 000000000..6fc19b1b1
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.4.png differ
diff --git a/assets/graphics/fonts/cp949.png.5.png b/assets/graphics/fonts/cp949.png.5.png
new file mode 100644
index 000000000..44d888c2f
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.5.png differ
diff --git a/assets/graphics/fonts/cp949.png.6.png b/assets/graphics/fonts/cp949.png.6.png
new file mode 100644
index 000000000..cd9306683
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.6.png differ
diff --git a/assets/graphics/fonts/cp949.png.7.png b/assets/graphics/fonts/cp949.png.7.png
new file mode 100644
index 000000000..771338099
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.7.png differ
diff --git a/assets/graphics/fonts/cp949.png.8.png b/assets/graphics/fonts/cp949.png.8.png
new file mode 100644
index 000000000..a5ddbced3
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.8.png differ
diff --git a/assets/graphics/fonts/cp949.png.9.png b/assets/graphics/fonts/cp949.png.9.png
new file mode 100644
index 000000000..54bb96ba0
Binary files /dev/null and b/assets/graphics/fonts/cp949.png.9.png differ
diff --git a/assets/graphics/fonts/teletype_9x12.png b/assets/graphics/fonts/teletype_9x12.png
new file mode 100644
index 000000000..12424cdcc
Binary files /dev/null and b/assets/graphics/fonts/teletype_9x12.png differ
diff --git a/assets/graphics/terrain/terrain.png b/assets/graphics/terrain/terrain.png
deleted file mode 100644
index 87003e373..000000000
Binary files a/assets/graphics/terrain/terrain.png and /dev/null differ
diff --git a/lib/natives/아카이브.zip b/lib/natives/아카이브.zip
new file mode 100644
index 000000000..072628cb7
Binary files /dev/null and b/lib/natives/아카이브.zip differ
diff --git a/src/net/torvald/imagefont/TinyAlphNum.kt b/src/net/torvald/imagefont/TinyAlphNum.kt
index 3d55c4862..5343735b8 100644
--- a/src/net/torvald/imagefont/TinyAlphNum.kt
+++ b/src/net/torvald/imagefont/TinyAlphNum.kt
@@ -15,7 +15,7 @@ class TinyAlphNum : Font {
     internal val W = 8
     internal val H = 8
 
-    private val chars = arrayOf(
+    /*private val chars = arrayOf(
             '0','1','2','3','4','5','6','7',
             '8','9','[','#','@',':','>','?',
             ' ','A','B','C','D','E','F','G',
@@ -25,11 +25,11 @@ class TinyAlphNum : Font {
             '+','/','S','T','U','V','W','X',
             'Y','Z','_',',','%','=','"','!'
     )
-    private val mappingTable = HashMap<Int, Int>()
+    private val mappingTable = HashMap<Int, Int>()*/
 
     init {
-        fontSheet = SpriteSheet("./assets/graphics/fonts/alphanumeric_small.png", W, H)
-        chars.forEachIndexed { i, c -> mappingTable[c.toInt()] = i }
+        fontSheet = SpriteSheet("./assets/graphics/fonts/cp949.png", W, H)
+        //chars.forEachIndexed { i, c -> mappingTable[c.toInt()] = i }
     }
 
     override fun getHeight(str: String): Int = H
@@ -52,15 +52,29 @@ class TinyAlphNum : Font {
         var thisCol = col
         var textPosOffset = 0
         for (i in 0..text.length - 1) {
-            val index = charToSpriteNum(text.toUpperCase().codePointAt(i))
+            //val index = charToSpriteNum(text.toUpperCase().codePointAt(i))
             val ch = text[i]
+            val index = ch.toInt() and 0xFF
 
             if (ch.isColourCode()) {
                 thisCol = GameFontBase.colourKey[ch]!!
                 continue
             }
             if (index != null) {
-                fontSheet.getSubImage(index % 8, index / 8).draw(
+                // shadow
+                fontSheet.getSubImage(index % 16, index / 16).draw(
+                        x + textPosOffset + 1, y, thisCol.darker(0.5f)
+                )
+                fontSheet.getSubImage(index % 16, index / 16).draw(
+                        x + textPosOffset + 1, y + 1, thisCol.darker(0.5f)
+                )
+                fontSheet.getSubImage(index % 16, index / 16).draw(
+                        x + textPosOffset, y + 1, thisCol.darker(0.5f)
+                )
+
+
+                // main
+                fontSheet.getSubImage(index % 16, index / 16).draw(
                         x + textPosOffset, y, thisCol
                 )
             }
@@ -72,7 +86,7 @@ class TinyAlphNum : Font {
         throw UnsupportedOperationException()
     }
 
-    private fun charToSpriteNum(ch: Int): Int? = mappingTable[ch]
+    //private fun charToSpriteNum(ch: Int): Int? = mappingTable[ch]
 
     fun Char.isColourCode() = GameFontBase.colourKey.containsKey(this)
 }
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/StateVTTest.kt b/src/net/torvald/terrarum/StateVTTest.kt
index d5a73926d..bddead353 100644
--- a/src/net/torvald/terrarum/StateVTTest.kt
+++ b/src/net/torvald/terrarum/StateVTTest.kt
@@ -2,7 +2,11 @@ package net.torvald.terrarum
 
 import net.torvald.terrarum.gamecontroller.Key
 import net.torvald.terrarum.virtualcomputer.computer.BaseTerrarumComputer
+import net.torvald.terrarum.virtualcomputer.terminal.ColouredTextTerminal
 import net.torvald.terrarum.virtualcomputer.terminal.SimpleTextTerminal
+import net.torvald.terrarum.virtualcomputer.terminal.Teletype
+import net.torvald.terrarum.virtualcomputer.terminal.TeletypeTerminal
+import org.newdawn.slick.Color
 import org.newdawn.slick.GameContainer
 import org.newdawn.slick.Graphics
 import org.newdawn.slick.Image
@@ -16,7 +20,7 @@ import org.newdawn.slick.state.StateBasedGame
  */
 class StateVTTest : BasicGameState() {
 
-    val vt = SimpleTextTerminal(SimpleTextTerminal.IBM_GREEN, 80, 25)
+    val vt = SimpleTextTerminal(SimpleTextTerminal.AMBER, 80, 25)
     val computerInside = BaseTerrarumComputer(vt)
 
     val vtUI = Image(vt.displayW, vt.displayH)
@@ -38,6 +42,8 @@ class StateVTTest : BasicGameState() {
 
     override fun getID() = Terrarum.STATE_ID_TEST_TTY
 
+    private val paperColour = Color(0xfffce6)
+
     override fun render(container: GameContainer, game: StateBasedGame, g: Graphics) {
         vt.render(container, vtUI.graphics)
 
@@ -45,7 +51,7 @@ class StateVTTest : BasicGameState() {
                 Terrarum.WIDTH.minus(vtUI.width).div(2f),
                 Terrarum.HEIGHT.minus(vtUI.height).div(2f))
 
-        //vtUI.graphics.flush()
+        vtUI.graphics.flush()
     }
 
     override fun keyPressed(key: Int, c: Char) {
@@ -55,11 +61,11 @@ class StateVTTest : BasicGameState() {
         if (key == Key.RETURN) {
             val input = vt.closeInput()
 
-            computerInside.runCommand(input, "consoleinput")
+            computerInside.runCommand(input, "=prompt")
 
             vt.openInput()
 
-            computerInside.runCommand("io.write(_COMPUTER.prompt)", "prompt")
+            computerInside.runCommand("io.write(_COMPUTER.prompt)", "=prompt")
         }
     }
 }
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/Terrarum.kt b/src/net/torvald/terrarum/Terrarum.kt
index f121a42f7..875d86bd3 100644
--- a/src/net/torvald/terrarum/Terrarum.kt
+++ b/src/net/torvald/terrarum/Terrarum.kt
@@ -100,14 +100,14 @@ constructor(gamename: String) : StateBasedGame(gamename) {
 
         gc.graphics.clear() // clean up any 'dust' in the buffer
 
-        addState(StateVTTest())
+        //addState(StateVTTest())
         //addState(StateTestingSandbox())
         //addState(StateSplash())
         //addState(StateMonitorCheck())
         //addState(StateFontTester())
 
-        //ingame = StateInGame()
-        //addState(ingame)
+        ingame = StateInGame()
+        addState(ingame)
     }
 
     companion object {
@@ -439,7 +439,8 @@ fun blendAlphaMap() {
 fun blendScreen() {
     GL11.glEnable(GL11.GL_BLEND)
     GL11.glColorMask(true, true, true, true)
-    GL11.glBlendFunc(GL11.GL_ONE, GL11.GL_ONE_MINUS_SRC_COLOR)}
+    GL11.glBlendFunc(GL11.GL_ONE, GL11.GL_ONE_MINUS_SRC_COLOR)
+}
 
 fun blendDisable() {
     GL11.glDisable(GL11.GL_BLEND)
diff --git a/src/net/torvald/terrarum/tileproperties/TilePropCodex.kt b/src/net/torvald/terrarum/tileproperties/TilePropCodex.kt
index 6cd89850c..df3161fcc 100644
--- a/src/net/torvald/terrarum/tileproperties/TilePropCodex.kt
+++ b/src/net/torvald/terrarum/tileproperties/TilePropCodex.kt
@@ -29,7 +29,7 @@ object TilePropCodex {
 
         try {
             // todo verify CSV using pre-calculated SHA256 hash
-            val records = CSVFetcher(CSV_PATH)
+            val records = CSVFetcher.readFromString(TilePropCSV.text)
 
             println("[TilePropCodex] Building tile properties table")
 
diff --git a/src/net/torvald/terrarum/virtualcomputer/assets/lua/CCAPI.lua b/src/net/torvald/terrarum/virtualcomputer/assets/lua/CCAPI.lua
new file mode 100644
index 000000000..fb0bc86d8
--- /dev/null
+++ b/src/net/torvald/terrarum/virtualcomputer/assets/lua/CCAPI.lua
@@ -0,0 +1,168 @@
+--[[
+-- ComputerCraft API compatibility layer
+   Usage: require("CCAPI")
+
+   Created by minjaesong on 16-09-16.
+--]]
+
+--------------
+-- PREAMBLE --
+--------------
+
+if term.isTeletype() then error("This is a teletype; cannot use CCAPI layer") end
+
+
+table.insert(_COMPUTER.loadedCLayer, "CCAPI")
+
+
+local function intLog2(i)
+    if i == 0 then return 0 end
+    local log = 0
+    if bit32.band(i, 0xffff0000) ~= 0 then i = bit32.rshift(i, 16) log = 16 end
+    if i >= 256 then i = bit32.rshift(i, 8) log = log + 8 end
+    if i >= 16  then i = bit32.rshift(i, 8) log = log + 4 end
+    if i >= 4   then i = bit32.rshift(i, 8) log = log + 2 end
+    return log + bit32.rshift(i, 1)
+end
+
+
+-------------
+-- BIT API --
+-------------
+
+_G.bit = {} -- CC's weird BIT API
+
+bit.blshift = function(n, bits) bit32.lshift(n, bits) end
+bit.brshift = function(n, bits) bit32.arshift(n, bits) end
+bit.blogic_rshift = function(n, bits) bit32.brshift(n, bits) end
+bit.bxor = function(m, n) bit32.bxor(m, n) end
+bit.bor = function(m, n) bit32.bor(m, n) end
+bit.band = function(m, n) bit32.band(m, n) end
+bit.bnot = function(n) bit32.bnot(n) end
+
+
+----------------
+-- COLORS API --
+----------------
+
+_G.colors = {}
+
+colors.white = 0x1
+colors.orange = 0x2
+colors.magenta = 0x4
+colors.lightBlue = 0x8
+colors.yellow = 0x10
+colors.lime = 0x20
+colors.pink = 0x40
+colors.gray = 0x80
+colors.lightGray = 0x100
+colors.cyan = 0x200
+colors.purple = 0x400
+colors.blue = 0x800
+colors.brown = 0x1000
+colors.green = 0x2000
+colors.red = 0x4000
+colors.black = 0x8000
+
+colors.combine = function(...)
+    local ret = 0
+    for _, c in ipairs(...) do
+        ret = bor(ret, c)
+    end
+    return ret
+end
+
+local function containsCol(target, cccol)
+    return bit32.band(target, cccol) > 0
+end
+
+colors.subtract = function(cccol, ...)
+    for _, c in ipairs(...) do
+        if not containsCol(cccol, c) then
+            cccol = bit32.bxor(cccol, c)
+        end
+    end
+    return cccol
+end
+
+
+local function normaliseCCcol(cccol)
+    if cccol >= 0x1 and cccol <= 0x8FFF then
+        return intLog2(cccol)
+    else
+        error("invalid CC Colors: "..cccol)
+    end
+end
+
+
+--------------
+-- TERM API --
+--------------
+
+-- paint_index -> Terminal colour index
+local ccToGameCol = {--pink
+    1, 5, 7, 10, 4, 11, 15, 2, 3, 10, 8, 9, 14, 12, 6, 0
+}
+
+-- "a" -> 10, "3" -> 3
+local function cHexToInt(c)
+    if type(c) == "number" then -- char
+        if c >= 48 and c <= 57 then
+            return c - 48
+        elseif c >= 65 and c <= 70 then
+            return c - 65
+        elseif c >= 97 and c <= 102 then
+            return c - 97
+        else
+            return 0
+        end
+    elseif type(c) == "string" then -- single-letter string
+        if c:byte(1) >= 48 and c:byte(1) <= 57 then
+            return c:byte(1) - 48
+        elseif c:byte(1) >= 65 and c:byte(1) <= 70 then
+            return c:byte(1) - 65
+        elseif c:byte(1) >= 97 and c:byte(1) <= 102 then
+            return c:byte(1) - 97
+        else
+            --error("unrepresentable: " .. c)
+            -- return black, as defined in http://www.computercraft.info/wiki/Term.blit
+            return 0
+        end
+    else
+        error("bad argument (string or number expected, got "..type(c)..")")
+    end
+end
+
+--                 str,  str,     str
+term.blit = function(text, foreCol, backCol)
+    assert(
+        type(text) == "string" and type(backCol) == "string" and type(foreCol) == "string",
+        "bad argument: (string, string, string expected, got "..type(text)..", "..type(foreCol)..", "..type(backCol)..")"
+    )
+    if #text ~= #foreCol or #text ~= #backCol or #foreCol ~= #backCol then
+        error("rrguments must be the same length")
+    end
+
+    for i = 1, #text do
+        term.setForeCol(cHexToInt(foreCol:byte(i)))
+        term.setBackCol(cHexToInt(backCol:byte(i)))
+        term.emit(text:byte(i))
+        term.moveCursor(term.getX() + 1, term.getY())
+    end
+end
+
+term.getCursorPos = function() return term.getCursor() end
+term.setCursorPos = function(x, y) term.moveCursor(x, y) end
+term.setCursorBlink = function(b) term.blink(b) end
+term.isColor = function() return term.isCol() end
+term.getSize = function() return term.size() end
+term.setTextColor = function(cccol) term.setForeCol(ccToGameCol[normaliseCCcol(cccol)]) end
+term.getTextColor = function() return term.getForeCol() end
+term.setBackgroundColor = function(cccol) term.setBackCol(ccToGameCol[normaliseCCcol(cccol)]) end
+term.getBackgroundColor = function() return term.getBackCol() end
+
+
+
+
+
+if _COMPUTER.verbose then print("ComputerCraft compatibility layer successfully loaded.") end
diff --git a/src/net/torvald/terrarum/virtualcomputer/assets/lua/ROMBASIC.lua b/src/net/torvald/terrarum/virtualcomputer/assets/lua/ROMBASIC.lua
index 5a0f87f08..d3488b003 100644
--- a/src/net/torvald/terrarum/virtualcomputer/assets/lua/ROMBASIC.lua
+++ b/src/net/torvald/terrarum/virtualcomputer/assets/lua/ROMBASIC.lua
@@ -1,13 +1,33 @@
+--[[
+   Must be loaded VERY FIRST!
+
+   Created by minjaesong on 16-09-13.
+--]]
+
+-- path for any ingame libraries
+package.path = "/net/torvald/terrarum/virtualcomputer/assets/lua/?.lua;" .. package.path
+
 -- global variables
+_G.MONEYSYM = string.char(0x9D) -- currency sign
+_G.MIDDOT = string.char(0xFA) -- middle dot sign
 _COMPUTER = {} -- standard console colours
-_COMPUTER["DC1"] = string.char(17) -- black
-_COMPUTER["DC2"] = string.char(18) -- white
-_COMPUTER["DC3"] = string.char(19) -- dim grey
-_COMPUTER["DC4"] = string.char(20) -- light grey
-_COMPUTER["prompt"] = function()
+_COMPUTER.DC1 = string.char(17) -- black
+_COMPUTER.DC2 = string.char(18) -- white
+_COMPUTER.DC3 = string.char(19) -- dim grey
+_COMPUTER.DC4 = string.char(20) -- light grey
+_COMPUTER.prompt = function()
     io.write(_COMPUTER.DC3 .. "> " .. _COMPUTER.DC4)
 end
--- greet user
+_COMPUTER.verbose = true -- print debug info
+_COMPUTER.loadedCLayer = {} -- list of loaded compatibility layers
+
+-- load libraries that coded in Lua
+require("ROMLIB")
+
+
+-- load bios, if any
+
+-- load Lua prompt, if bios is not found
 print("Rom basic " .. _COMPUTER.DC2 .. _VERSION .. _COMPUTER.DC4)
 -- print(_COMPUTER.DC2 .. freemem .. _COMPUTER.DC4 .. " bytes free"
 print("Ok")
diff --git a/src/net/torvald/terrarum/virtualcomputer/assets/lua/ROMLIB.lua b/src/net/torvald/terrarum/virtualcomputer/assets/lua/ROMLIB.lua
new file mode 100644
index 000000000..531adbd89
--- /dev/null
+++ b/src/net/torvald/terrarum/virtualcomputer/assets/lua/ROMLIB.lua
@@ -0,0 +1,48 @@
+--[[
+   Created by minjaesong on 16-09-15.
+--]]
+
+
+--------------
+-- HEXUTILS --
+--------------
+
+_G.hexutils = {}
+
+_G.hexutils.toHexString = function(byteString)
+    assert(type(byteString) == "string", error("Expected string."))
+
+    -- speedup
+    local function iToHex(i)
+        if i == 0 then return "0"
+        elseif i == 1 then return "1"
+        elseif i == 2 then return "2"
+        elseif i == 3 then return "3"
+        elseif i == 4 then return "4"
+        elseif i == 5 then return "5"
+        elseif i == 6 then return "6"
+        elseif i == 7 then return "7"
+        elseif i == 8 then return "8"
+        elseif i == 9 then return "9"
+        elseif i == 10 then return "a"
+        elseif i == 11 then return "b"
+        elseif i == 12 then return "c"
+        elseif i == 13 then return "d"
+        elseif i == 14 then return "e"
+        elseif i == 15 then return "f"
+        else error("unrepresentable: " .. i)
+        end
+    end
+
+    local ret = ""
+
+    for i = 1, #byteString do
+        local c = byteString:byte(i)
+        local msb = iToHex(bit32.rshift(c, 4) % 16)
+        local lsb = iToHex(c % 16)
+
+        ret = ret .. (msb .. lsb)
+    end
+
+    return ret
+end
diff --git a/src/net/torvald/terrarum/virtualcomputer/computer/BaseTerrarumComputer.kt b/src/net/torvald/terrarum/virtualcomputer/computer/BaseTerrarumComputer.kt
index e27efc7fa..2199833d3 100644
--- a/src/net/torvald/terrarum/virtualcomputer/computer/BaseTerrarumComputer.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/computer/BaseTerrarumComputer.kt
@@ -5,10 +5,7 @@ import li.cil.repack.org.luaj.vm2.LuaError
 import li.cil.repack.org.luaj.vm2.LuaValue
 import li.cil.repack.org.luaj.vm2.lib.jse.JsePlatform
 import net.torvald.terrarum.virtualcomputer.lualib.TermLib
-import net.torvald.terrarum.virtualcomputer.terminal.SimpleTextTerminal
-import net.torvald.terrarum.virtualcomputer.terminal.Terminal
-import net.torvald.terrarum.virtualcomputer.terminal.TerminalInputStream
-import net.torvald.terrarum.virtualcomputer.terminal.TerminalPrintStream
+import net.torvald.terrarum.virtualcomputer.terminal.*
 import org.newdawn.slick.GameContainer
 import java.io.*
 
@@ -19,7 +16,7 @@ import java.io.*
  *
  * Created by minjaesong on 16-09-10.
  */
-class BaseTerrarumComputer(term: Terminal?) {
+class BaseTerrarumComputer(term: Teletype?) {
 
     val luaJ_globals: Globals = JsePlatform.standardGlobals()
 
@@ -40,7 +37,8 @@ class BaseTerrarumComputer(term: Terminal?) {
             luaJ_globals.STDERR = termErr
             luaJ_globals.STDIN = termIn
 
-            loadTermLib(term)
+            // load libraries
+            TermLib(luaJ_globals, term)
         }
 
         // ROM BASIC
@@ -135,21 +133,4 @@ class BaseTerrarumComputer(term: Terminal?) {
 
         val DEBUGTHRE = true
     }
-
-    /////////////////////////
-    // MANUAU LIBRARY LOAD //
-    /////////////////////////
-    private fun loadTermLib(term: Terminal) {
-        luaJ_globals["term"] = LuaValue.tableOf()
-        luaJ_globals["term"]["test"] = TermLib.Test(term)
-        luaJ_globals["term"]["setCursorPos"] = TermLib.MoveCursor(term)
-        luaJ_globals["term"]["setcursorpos"] = TermLib.MoveCursor(term)
-        luaJ_globals["term"]["gotoxy"]       = TermLib.MoveCursor(term) // pascal-style alias
-        luaJ_globals["term"]["getCursorPos"] = TermLib.GetCursorPos(term)
-        luaJ_globals["term"]["getcursorpos"] = TermLib.GetCursorPos(term)
-        luaJ_globals["term"]["setCursorBlink"] = TermLib.SetCursorBlink(term)
-        luaJ_globals["term"]["setcursorblink"] = TermLib.SetCursorBlink(term)
-        luaJ_globals["term"]["getSize"] = TermLib.GetSize(term)
-        luaJ_globals["term"]["getsize"] = TermLib.GetSize(term)
-    }
 }
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/lualib/SecurityLib.kt b/src/net/torvald/terrarum/virtualcomputer/lualib/SecurityLib.kt
new file mode 100644
index 000000000..82dbdb4c1
--- /dev/null
+++ b/src/net/torvald/terrarum/virtualcomputer/lualib/SecurityLib.kt
@@ -0,0 +1,83 @@
+package net.torvald.terrarum.virtualcomputer.lualib
+
+import li.cil.repack.org.luaj.vm2.LuaValue
+import li.cil.repack.org.luaj.vm2.lib.OneArgFunction
+import net.torvald.terrarum.gameworld.toUint
+import org.apache.commons.codec.binary.Base64
+import org.apache.commons.codec.digest.DigestUtils
+import java.security.SecureRandom
+
+/**
+ * Created by minjaesong on 16-09-15.
+ */
+class SecurityLib {
+    /** @return byteArray as String */
+    class SHA256sum : OneArgFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            val hashBytes = DigestUtils.sha256(p0.checkjstring())
+            return LuaValue.valueOf(hashBytes.toStringRepresentation())
+        }
+    }
+
+    /** @return byteArray as String */
+    class SHA1sum: OneArgFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            val hashBytes = DigestUtils.sha1(p0.checkjstring())
+            return LuaValue.valueOf(hashBytes.toStringRepresentation())
+        }
+    }
+
+    /** @return byteArray as String */
+    class MD5sum: OneArgFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            val hashBytes = DigestUtils.md5(p0.checkjstring())
+            return LuaValue.valueOf(hashBytes.toStringRepresentation())
+        }
+    }
+
+    /** @return byteArray as String */
+    class SecureRandomHex: OneArgFunction() {
+        override fun call(byteSize: LuaValue): LuaValue {
+            val bytes = ByteArray(byteSize.checkint())
+            SecureRandom().nextBytes(bytes)
+
+            return LuaValue.valueOf(bytes.toStringRepresentation())
+        }
+    }
+
+    /** @return String */
+    class DecodeBase64: OneArgFunction() {
+        override fun call(base64: LuaValue): LuaValue {
+            val decodedBytes = Base64.decodeBase64(base64.checkjstring())
+            return LuaValue.valueOf(decodedBytes.toStringRepresentation())
+        }
+    }
+
+    /** @return byteArray as String */
+    class EncodeBase64: OneArgFunction() {
+        override fun call(inputString: LuaValue): LuaValue {
+            val inputBytes = inputString.checkjstring().toByteArray(charset("UTF-8"))
+            return LuaValue.valueOf(Base64.encodeBase64(inputBytes).toStringRepresentation())
+        }
+    }
+
+    companion object {
+        val hexLookup = charArrayOf(
+                '0', '1', '2', '3', '4', '5', '6', '7',
+                '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
+        )
+
+        fun Byte.toHexString(): String {
+            val bInt = this.toUint()
+            return "${hexLookup[bInt.shr(8).and(0xf)]}${hexLookup[bInt.and(0xf)]}"
+        }
+
+        /** essentially, 0xFC to 0xFC.toChar() */
+        fun ByteArray.toStringRepresentation(): String {
+            val sb = StringBuilder()
+            for (b in this)
+                sb.append(b.toChar())
+            return sb.toString()
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/lualib/TermLib.kt b/src/net/torvald/terrarum/virtualcomputer/lualib/TermLib.kt
index 93fc41a4a..e85afde8b 100644
--- a/src/net/torvald/terrarum/virtualcomputer/lualib/TermLib.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/lualib/TermLib.kt
@@ -2,6 +2,7 @@ package net.torvald.terrarum.virtualcomputer.lualib
 
 import li.cil.repack.org.luaj.vm2.*
 import li.cil.repack.org.luaj.vm2.lib.*
+import net.torvald.terrarum.virtualcomputer.terminal.Teletype
 import net.torvald.terrarum.virtualcomputer.terminal.Terminal
 
 /**
@@ -9,35 +10,135 @@ import net.torvald.terrarum.virtualcomputer.terminal.Terminal
  *
  * Created by minjaesong on 16-09-12.
  */
-internal class TermLib(val vt: Terminal) : ZeroArgFunction() {
-    var INSTANCE: TermLib? = null
+internal class TermLib(globals: Globals, term: Teletype) {
 
     init {
-        if (INSTANCE == null) INSTANCE = this
-    }
+        // load things. WARNING: THIS IS MANUAL!
+        globals["term"] = LuaValue.tableOf()
+        globals["term"]["write"] = TermLib.WriteString(term)
+        globals["term"]["print"] = TermLib.PrintString(term)
+        globals["term"]["newLine"] = TermLib.NewLine(term)
+        globals["term"]["moveCursor"] = TermLib.MoveCursor(term) // TTY function
+        globals["term"]["width"] = TermLib.GetWidth(term)
+        globals["term"]["scroll"] = TermLib.Scroll(term)
+        globals["term"]["isTeletype"] = TermLib.IsTeletype(term)
 
-    override fun call(): LuaValue {
-        throw UnsupportedOperationException("""Invalid usage!
-usage:
-    luaJ_globals["term"] = LuaValue.tableOf()
-    luaJ_globals["term"]["test"] = TermLib.Test(term)
-    ...
-""")
-    }
-
-    class Test(val term: Terminal) : ZeroArgFunction() {
-        override fun call(): LuaValue {
-            return LuaDouble.valueOf("TermTest")
+        if (term is Terminal) {
+            globals["term"]["emitRaw"] = TermLib.EmitRaw(term)
+            globals["term"]["emit"] = TermLib.Emit(term)
+            globals["term"]["resetColor"] = TermLib.ResetColour(term)
+            globals["term"]["resetColour"] = TermLib.ResetColour(term)
+            globals["term"]["clear"] = TermLib.Clear(term)
+            globals["term"]["clearLine"] = TermLib.ClearLine(term)
+            globals["term"]["moveCursor"] = TermLib.SetCursorPos(term)
+            globals["term"]["getCursor"] = TermLib.GetCursorPos(term)
+            globals["term"]["getX"] = TermLib.GetCursorX(term)
+            globals["term"]["getY"] = TermLib.GetCursorY(term)
+            globals["term"]["blink"] = TermLib.SetCursorBlink(term)
+            globals["term"]["size"] = TermLib.GetSize(term)
+            globals["term"]["isCol"] = TermLib.IsColour(term)
+            globals["term"]["setForeCol"] = TermLib.SetForeColour(term)
+            globals["term"]["setBackCol"] = TermLib.SetBackColour(term)
+            globals["term"]["foreCol"] = TermLib.GetForeColour(term)
+            globals["term"]["backCol"] = TermLib.GetBackColour(term)
         }
     }
 
-    class MoveCursor(val term: Terminal) : TwoArgFunction() {
+    class WriteString(val tty: Teletype) : LuaFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            if (tty is Terminal)
+                tty.writeString(p0.checkjstring())
+            else
+                tty.writeChars(p0.checkjstring())
+            return LuaValue.NONE
+        }
+
+        override fun call(s: LuaValue, x: LuaValue, y: LuaValue): LuaValue {
+            if (tty is Terminal)
+                tty.writeString(s.checkjstring(), x.checkint(), y.checkint())
+            else
+                throw LuaError("couldn't move cursor; TTY is one-dimensional")
+            return LuaValue.NONE
+        }
+    }
+
+    class PrintString(val tty: Teletype) : LuaFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            if (tty is Terminal)
+                tty.printString(p0.checkjstring())
+            else
+                tty.printChars(p0.checkjstring())
+            return LuaValue.NONE
+        }
+
+        override fun call(s: LuaValue, x: LuaValue, y: LuaValue): LuaValue {
+            if (tty is Terminal)
+                tty.printString(s.checkjstring(), x.checkint(), y.checkint())
+            else
+                throw LuaError("couldn't move cursor; TTY is one-dimensional")
+            return LuaValue.NONE
+        }
+    }
+
+    class NewLine(val tty: Teletype) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            tty.newLine()
+            return LuaValue.NONE
+        }
+    }
+
+    class EmitRaw(val term: Terminal) : OneArgFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            term.emitChar(p0.checkint())
+            return LuaValue.NONE
+        }
+    }
+
+    class Emit(val term: Terminal) : OneArgFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            term.emitChar(p0.checkint().toChar())
+            return LuaValue.NONE
+        }
+    }
+
+    class ResetColour(val term: Terminal) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            term.resetColour()
+            return LuaValue.NONE
+        }
+    }
+
+    class Clear(val term: Terminal) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            term.clear()
+            return LuaValue.NONE
+        }
+    }
+
+    class ClearLine(val term: Terminal) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            term.clearLine()
+            return LuaValue.NONE
+        }
+    }
+
+    /** term.setCursorPos(number x, number y) */
+    class SetCursorPos(val term: Terminal) : TwoArgFunction() {
         override fun call(x: LuaValue, y: LuaValue): LuaValue {
             term.setCursor(x.checkint(), y.checkint())
             return LuaValue.NONE
         }
     }
 
+    /** term.setCursorPos(number x) */
+    class MoveCursor(val tty: Teletype) : OneArgFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            for (i in 1..p0.checkint())
+                tty.printChar(' ')
+            return LuaValue.NONE
+        }
+    }
+
     class GetCursorPos(val term: Terminal) : VarArgFunction() {
         override fun invoke(args: Varargs?): Varargs {
             val ret = arrayOf(LuaValue.valueOf(term.cursorX), LuaValue.valueOf(term.cursorY))
@@ -45,6 +146,19 @@ usage:
         }
     }
 
+    class GetCursorX(val term: Terminal) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            return LuaValue.valueOf(term.cursorX)
+        }
+    }
+
+    class GetCursorY(val term: Terminal) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            return LuaValue.valueOf(term.cursorY)
+        }
+    }
+
+    /** term.setCursorBlink(boolean bool) */
     class SetCursorBlink(val term: Terminal) : OneArgFunction() {
         override fun call(p0: LuaValue): LuaValue {
             term.cursorBlink = p0.toboolean()
@@ -59,9 +173,58 @@ usage:
         }
     }
 
-    class IsColor(val term: Terminal) : ZeroArgFunction() {
+    class GetWidth(val tty: Teletype) : ZeroArgFunction() {
         override fun call(): LuaValue {
-            throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+            return LuaValue.valueOf(tty.width)
+        }
+    }
+
+    class IsColour(val term: Terminal) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            return LuaValue.valueOf(term.coloursCount > 4)
+        }
+    }
+
+    /** term.scroll(number n) */
+    class Scroll(val tty: Teletype) : OneArgFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            if (tty is Terminal) tty.scroll(p0.checkint())
+            else for (i in 1..p0.checkint()) tty.newLine()
+            return LuaValue.NONE
+        }
+    }
+
+    /** term.setTextColor(number color) */
+    class SetForeColour(val term: Terminal) : OneArgFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            term.foreColour = p0.checkint()
+            return LuaValue.NONE
+        }
+    }
+
+    /** term.setBackgroundColor(number color) */
+    class SetBackColour(val term: Terminal) : OneArgFunction() {
+        override fun call(p0: LuaValue): LuaValue {
+            term.backColour = p0.checkint()
+            return LuaValue.NONE
+        }
+    }
+
+    class GetForeColour(val term: Terminal) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            return LuaValue.valueOf(term.foreColour)
+        }
+    }
+
+    class GetBackColour(val term: Terminal) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            return LuaValue.valueOf(term.backColour)
+        }
+    }
+
+    class IsTeletype(val termInQuestion: Teletype) : ZeroArgFunction() {
+        override fun call(): LuaValue {
+            return LuaValue.valueOf(termInQuestion.coloursCount == 0)
         }
     }
 
diff --git a/src/net/torvald/terrarum/virtualcomputer/terminal/ColouredTextTerminal.kt b/src/net/torvald/terrarum/virtualcomputer/terminal/ColouredTextTerminal.kt
index a73c487ec..14f65ed35 100644
--- a/src/net/torvald/terrarum/virtualcomputer/terminal/ColouredTextTerminal.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/terminal/ColouredTextTerminal.kt
@@ -9,31 +9,33 @@ import org.newdawn.slick.Image
 /**
  * Created by minjaesong on 16-09-12.
  */
-class ColouredTextTerminal(override val width: Int, override val height: Int
+class ColouredTextTerminal(
+        override val width: Int, override val height: Int
 ) : SimpleTextTerminal(Color.white, width, height) {
     override val colours = arrayOf(
-            Color(0x00, 0x00, 0x00), // black
-            Color(0xff, 0xff, 0xff), // white
-            Color(0x55, 0x55, 0x55), // dim grey
-            Color(0xaa, 0xaa, 0xaa), // light grey
+            Color(0x00, 0x00, 0x00), // 0 black
+            Color(0xff, 0xff, 0xff), // 1 white
+            Color(0x55, 0x55, 0x55), // 2 dim grey
+            Color(0xaa, 0xaa, 0xaa), // 3 light grey
 
-            Color(0xff, 0xff, 0x00), // yellow
-            Color(0xff, 0x66, 0x00), // orange
-            Color(0xdd, 0x00, 0x00), // red
-            Color(0xff, 0x00, 0x99), // magenta
+            Color(0xff, 0xff, 0x00), // 4 yellow
+            Color(0xff, 0x66, 0x00), // 5 orange
+            Color(0xdd, 0x00, 0x00), // 6 red
+            Color(0xff, 0x00, 0x99), // 7 magenta
 
-            Color(0x33, 0x00, 0x99), // purple
-            Color(0x00, 0x00, 0xcc), // blue
-            Color(0x00, 0x99, 0xff), // cyan
-            Color(0x66, 0xff, 0x33), // lime
+            Color(0x33, 0x00, 0x99), // 8 purple
+            Color(0x00, 0x00, 0xcc), // 9 blue
+            Color(0x00, 0x99, 0xff), //10 cyan
+            Color(0x66, 0xff, 0x33), //11 lime
 
-            Color(0x00, 0xaa, 0x00), // green
-            Color(0x00, 0x66, 0x00), // dark green
-            Color(0x66, 0x33, 0x00), // brown
-            Color(0x99, 0x66, 0x33)  // tan
+            Color(0x00, 0xaa, 0x00), //12 green
+            Color(0x00, 0x66, 0x00), //13 dark green
+            Color(0x66, 0x33, 0x00), //14 brown
+            Color(0x99, 0x66, 0x33)  //15 tan
     )                                // THESE ARE THE STANDARD
 
-    override val coloursCount = colours.size
+    override val coloursCount: Int
+        get() = colours.size
 
     override val backDefault = 0
     override val foreDefault = 3
@@ -41,11 +43,11 @@ class ColouredTextTerminal(override val width: Int, override val height: Int
     override var backColour = backDefault
     override var foreColour = foreDefault
 
-    override val fontRef = "./assets/graphics/fonts/CGA.png"
+    override val fontRef = "./assets/graphics/fonts/cp949.png"
     override val fontImg = Image(fontRef)
     override val fontW = fontImg.width / 16
     override val fontH = fontImg.height / 16
     override val font = ColouredFastFont(this, fontRef, fontW, fontH)
 
-    override val colourScreen = Color.black
+    override val colourScreen: Color = Color.black
 }
\ 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 1c8d24c5a..019bfe545 100644
--- a/src/net/torvald/terrarum/virtualcomputer/terminal/SimpleTextTerminal.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/terminal/SimpleTextTerminal.kt
@@ -31,7 +31,8 @@ open class SimpleTextTerminal(
             Color(0xaa, 0xaa, 0xaa)  // light grey
     )                                // THESE ARE THE STANDARD
 
-    override val coloursCount = colours.size
+    override val coloursCount: Int
+        get() = colours.size
 
     open protected val backDefault = 0 // STANDARD
     open protected val foreDefault = 3 // STANDARD
@@ -59,14 +60,11 @@ open class SimpleTextTerminal(
 
     private val TABSIZE = 4
 
-    private val ASCII_NUL = 0.toChar()
-
     private var cursorBlinkTimer = 0
     private val cursorBlinkLen = 250
     private var cursorBlinkOn = true
 
 
-
     override fun getColor(index: Int): Color = colours[index]
 
     override fun update(gc: GameContainer, delta: Int) {
@@ -177,21 +175,6 @@ open class SimpleTextTerminal(
         screenBuffer.drawBuffer(cursorX, cursorY, c.toInt().and(0xFF).toChar(), colourKey)
     }
 
-    val asciiControlInUse = charArrayOf(
-            ASCII_NUL,
-            ASCII_BEL,
-            ASCII_BS,
-            ASCII_TAB,
-            ASCII_LF,
-            ASCII_FF,
-            ASCII_CR,
-            ASCII_DEL,
-            ASCII_DC1,
-            ASCII_DC2,
-            ASCII_DC3,
-            ASCII_DC4
-    )
-
     /** Prints a char and move cursor accordingly. */
     override fun printChar(c: Char) {
         wrap()
@@ -204,7 +187,7 @@ open class SimpleTextTerminal(
                 ASCII_BEL -> beep()
                 ASCII_BS  -> { cursorX -= 1; wrap() }
                 ASCII_TAB -> { cursorX = (cursorX).div(TABSIZE).times(TABSIZE) + TABSIZE }
-                ASCII_LF  -> { cursorX = 0; cursorY += 1; wrap() }
+                ASCII_LF  -> newLine()
                 ASCII_FF  -> clear()
                 ASCII_CR  -> { cursorX = 0 }
                 ASCII_DEL -> { cursorX -= 1; wrap(); emitChar(colourKey.shl(8)) }
@@ -213,14 +196,30 @@ open class SimpleTextTerminal(
         }
     }
 
-    /** Emits a string and move cursor accordingly. */
+    /** (TTY): Prints a series of chars and move cursor accordingly, then LF
+     * (term): printString() on current cursor pos */
+    override fun printChars(s: String) {
+        printString(s, cursorX, cursorY)
+    }
+
+    /** (TTY): Prints a series of chars and move cursor accordingly
+     * (term): writeString() on current cursor pos */
+    override fun writeChars(s: String) {
+        writeString(s, cursorX, cursorY)
+    }
+
+    /** Emits a string and move cursor accordingly, then do LF */
     override fun printString(s: String, x: Int, y: Int) {
+        writeString(s, x, y)
+        newLine()
+    }
+
+    /** Emits a string and move cursor accordingly. */
+    override fun writeString(s: String, x: Int, y: Int) {
         setCursor(x, y)
         emitString(s)
         val absCursorPos = cursorX + cursorY * width + s.length
         setCursor(absCursorPos % width, absCursorPos / width)
-
-        printChar(ASCII_LF)
     }
 
     /** Emits a string. Does not move cursor */
@@ -245,7 +244,13 @@ open class SimpleTextTerminal(
             screenBuffer.drawBuffer(i, cursorY, 0.toChar(), colourKey)
     }
 
+    override fun newLine() {
+        cursorX = 0; cursorY += 1; wrap()
+    }
+
     override fun scroll(amount: Int) {
+        if (amount < 0) throw IllegalArgumentException("cannot scroll up")
+
         val offset = amount * width
         for (i in offset..screenBuffer.sizeof.ushr(1) - 1) {
             screenBuffer.frameBuffer[i - offset] = screenBuffer.frameBuffer[i]
@@ -341,7 +346,7 @@ open class SimpleTextTerminal(
     }
 
     /** for "beep code" on modern BIOS. Pattern: - . */
-    override fun beep(pattern: String) {
+    override fun bell(pattern: String) {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 
@@ -390,6 +395,7 @@ open class SimpleTextTerminal(
         val ELECTRIC_BLUE = Color(0, 239, 255) // imaginary, 486 nm
         val RED = Color(250, 0, 0) // <= 645 nm
 
+        val ASCII_NUL = 0.toChar()
         val ASCII_BEL = 7.toChar()   // *BEEP!*
         val ASCII_BS = 8.toChar()    // x = x - 1
         val ASCII_TAB = 9.toChar()   // move cursor to next (TABSIZE * yy) pos (5 -> 8, 3- > 4, 4 -> 8)
@@ -401,6 +407,21 @@ open class SimpleTextTerminal(
         val ASCII_DC2 = 18.toChar()  // foreground colour 1
         val ASCII_DC3 = 19.toChar()  // foreground colour 2
         val ASCII_DC4 = 20.toChar()  // foreground colour 3
+
+        val asciiControlInUse = charArrayOf(
+                ASCII_NUL,
+                ASCII_BEL,
+                ASCII_BS,
+                ASCII_TAB,
+                ASCII_LF,
+                ASCII_FF,
+                ASCII_CR,
+                ASCII_DEL,
+                ASCII_DC1,
+                ASCII_DC2,
+                ASCII_DC3,
+                ASCII_DC4
+        )
     }
 
     private val DEBUG = true
diff --git a/src/net/torvald/terrarum/virtualcomputer/terminal/Teletype.kt b/src/net/torvald/terrarum/virtualcomputer/terminal/Teletype.kt
new file mode 100644
index 000000000..5a651a7b7
--- /dev/null
+++ b/src/net/torvald/terrarum/virtualcomputer/terminal/Teletype.kt
@@ -0,0 +1,38 @@
+package net.torvald.terrarum.virtualcomputer.terminal
+
+import org.newdawn.slick.GameContainer
+import org.newdawn.slick.Graphics
+
+/**
+ * Created by minjaesong on 16-09-14.
+ */
+interface Teletype {
+    val width: Int
+    val displayW: Int
+
+    var cursorX: Int
+
+    /**
+     * 0: Teletype
+     * 4: Non-colour terminal (Note that '2' is invalid!)
+     * >4: Colour terminal
+     */
+    val coloursCount: Int
+
+    fun update(gc: GameContainer, delta: Int)
+    fun render(gc: GameContainer, g: Graphics)
+    fun keyPressed(key: Int, c: Char)
+
+    /** Prints a char and move cursor accordingly */
+    fun printChar(c: Char)
+    /** (TTY): Prints a series of chars and move cursor accordingly, then LF
+     * (term): printString() on current cursor pos */
+    fun printChars(s: String)
+    /** (TTY): Prints a series of chars and move cursor accordingly
+     * (term): writeString() on current cursor pos */
+    fun writeChars(s: String)
+    fun newLine()
+    fun scroll(amount: Int = 1)
+
+    fun bell(pattern: String = ".")
+}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/terminal/TeletypeTerminal.kt b/src/net/torvald/terrarum/virtualcomputer/terminal/TeletypeTerminal.kt
new file mode 100644
index 000000000..e3de74ee4
--- /dev/null
+++ b/src/net/torvald/terrarum/virtualcomputer/terminal/TeletypeTerminal.kt
@@ -0,0 +1,223 @@
+package net.torvald.terrarum.virtualcomputer.terminal
+
+import net.torvald.imagefont.GameFontBase
+import net.torvald.terrarum.blendMul
+import net.torvald.terrarum.blendNormal
+import org.newdawn.slick.*
+import java.util.*
+
+/**
+ * Created by minjaesong on 16-09-15.
+ */
+class TeletypeTerminal : Teletype {
+    override val width = 40
+    override val displayW: Int
+        get() = width * font.W
+    /**
+     * 0: Teletype
+     * 4: Non-colour terminal (Note that '2' is invalid!)
+     * >4: Colour terminal
+     */
+    override val coloursCount = 0
+
+    override var cursorX = 0
+
+    private val font = TTYFont()
+
+    private var lineBuffer = StringBuilder()
+
+    private var currentJob = 0
+    private var currentJobStep = 0
+    private var currentJobLen = 0
+    private var currentJobQueue: Any? = null
+    // make sure certain jobs deliberately take long time by doing them one-by-one, for each frame.
+    private val JOB_IDLE = 0
+    private val JOB_MOVEHEAD = 1
+    private val JOB_PRINTCHAR = 2
+    private val JOB_LINEFEED = 3
+
+    override fun update(gc: GameContainer, delta: Int) {
+        wrap()
+
+        /*when (currentJob) {
+            JOB_PRINTCHAR -> {
+                printChar((currentJobQueue!! as String)[currentJobStep])
+                currentJobStep += 1
+            }
+            JOB_LINEFEED -> {
+                newLine()
+                currentJobStep += 1
+            }
+        }*/
+
+        if (currentJobStep > currentJobLen) {
+            currentJob = JOB_IDLE
+            currentJobLen = 0
+            currentJobStep = 0
+            currentJobQueue = null
+        }
+    }
+
+    override fun render(gc: GameContainer, g: Graphics) {
+        g.font = font
+        g.drawString(lineBuffer.toString(), 0f, 0f)
+    }
+
+    val TABSIZE = 4
+
+    /** Prints a char and move cursor accordingly */
+    override fun printChar(c: Char) {
+        wrap()
+        if (c >= ' ' && c.toInt() != 127) {
+            lineBuffer.append(c)
+            cursorX += 1
+        }
+        else {
+            when (c) {
+                SimpleTextTerminal.ASCII_BEL -> bell()
+                SimpleTextTerminal.ASCII_BS  -> { cursorX -= 1; wrap() }
+                SimpleTextTerminal.ASCII_TAB -> { cursorX = (cursorX).div(TABSIZE).times(TABSIZE) + TABSIZE }
+                SimpleTextTerminal.ASCII_LF  -> newLine()
+                SimpleTextTerminal.ASCII_FF  -> newLine()
+                SimpleTextTerminal.ASCII_CR  -> { cursorX = 0 }
+                SimpleTextTerminal.ASCII_DEL -> { } // NOT supported, do nothing
+                SimpleTextTerminal.ASCII_DC1, SimpleTextTerminal.ASCII_DC2, SimpleTextTerminal.ASCII_DC3, SimpleTextTerminal.ASCII_DC4
+                -> { } // NOT supported, do nothing
+            }
+        }
+    }
+
+    /** (TTY): Prints a series of chars and move cursor accordingly
+     * (term): writeString() on current cursor pos */
+    override fun writeChars(s: String) {
+        /*currentJob = JOB_PRINTCHAR
+        currentJobLen = s.length
+        currentJobQueue = s*/
+        for (i in 0..s.length - 1)
+            printChar(s[i])
+    }
+
+    /** (TTY): Prints a series of chars and move cursor accordingly, then LF
+     * (term): writeString() on current cursor pos */
+    override fun printChars(s: String) {
+        /*currentJob = JOB_PRINTCHAR
+        currentJobLen = s.length + 1
+        currentJobQueue = "$s\n"*/
+        writeChars("$s\n")
+    }
+
+    override fun newLine() {
+        lineBuffer = StringBuilder()
+    }
+
+    override fun scroll(amount: Int) {
+        if (amount < 0) throw IllegalArgumentException("cannot scroll up")
+        if (amount == 1) { newLine(); return }
+
+        currentJob = JOB_LINEFEED
+        currentJobLen = amount
+    }
+
+    override fun bell(pattern: String) {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    private fun wrap() {
+        if (cursorX < 0) cursorX = 0
+        else if (cursorX >= width) newLine()
+    }
+
+    var sb: StringBuilder = StringBuilder()
+    private var inputOpen = false
+    val DEBUG = true
+
+    /**
+     * Technically, this is different from Java's InputStream
+     */
+    fun openInput() {
+        inputOpen = true
+        if (DEBUG) println("[SimpleTextTerminal] openInput()")
+    }
+
+    fun closeInput(): String {
+        inputOpen = false
+        val ret = sb.toString()
+        sb = StringBuilder()
+
+        if (DEBUG) println("[SimpleTextTerminal] closeInput(), $ret")
+        return ret
+    }
+
+    override fun keyPressed(key: Int, c: Char) {
+        if (inputOpen) {
+            if (c == SimpleTextTerminal.ASCII_CR)
+                printChar(SimpleTextTerminal.ASCII_LF)
+            else
+                printChar(c)
+            if (!SimpleTextTerminal.asciiControlInUse.contains(c)) sb.append(c)
+            else if (c == SimpleTextTerminal.ASCII_DEL && sb.length > 0) sb.deleteCharAt(sb.length - 1)
+        }
+    }
+
+    class TTYFont : Font {
+
+        internal val fontSheet: SpriteSheet
+
+        internal val W = 9
+        internal val H = 12
+
+        private val chars = arrayOf(
+                '0','1','2','3','4','5','6','7',
+                '8','9','[','#','@',':','>','?',
+                ' ','A','B','C','D','E','F','G',
+                'H','I','&','.',']','(','<','\\',
+                '^','J','K','L','M','N','O','P', // ^: escape for capital letter
+                'Q','R','-','¤','*',')',';','\'',
+                '+','/','S','T','U','V','W','X',
+                'Y','Z','_',',','%','=','"','!'
+        )
+        private val mappingTable = HashMap<Int, Int>()
+
+        init {
+            fontSheet = SpriteSheet("./assets/graphics/fonts/teletype_9x12.png", W, H)
+            chars.forEachIndexed { i, c -> mappingTable[c.toInt()] = i }
+        }
+
+        override fun getHeight(str: String): Int = H
+
+        override fun getWidth(str: String): Int {
+            var ret = 0
+            for (i in 0..str.length - 1)
+                ret += W
+            return ret
+        }
+
+        override fun getLineHeight(): Int = H
+
+        override fun drawString(x: Float, y: Float, text: String) = drawString(x, y, text, Color.white)
+
+        override fun drawString(x: Float, y: Float, text: String, col: Color) {
+            var thisCol = col
+            var textPosOffset = 0
+
+            for (i in 0..text.length - 1) {
+                val index = charToSpriteNum(text.toUpperCase().codePointAt(i))
+                val ch = text[i]
+
+                if (index != null) {
+                    // main
+                    fontSheet.getSubImage(index % 8, index / 8).draw(
+                            x + textPosOffset, y, thisCol
+                    )
+                }
+                textPosOffset += W
+            }
+        }
+
+        override fun drawString(x: Float, y: Float, text: String, col: Color, startIndex: Int, endIndex: Int) {
+            throw UnsupportedOperationException()
+        }
+
+        private fun charToSpriteNum(ch: Int): Int? = mappingTable[ch]
+    }
+}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/terminal/Terminal.kt b/src/net/torvald/terrarum/virtualcomputer/terminal/Terminal.kt
index 85c58509d..6df4e4fde 100644
--- a/src/net/torvald/terrarum/virtualcomputer/terminal/Terminal.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/terminal/Terminal.kt
@@ -6,19 +6,19 @@ import org.newdawn.slick.Graphics
 import org.newdawn.slick.Input
 
 /**
- * A tty (terminal)
+ * A terminal
  *
- * Framebuffer : use net.torvald.aa.AAFrame
+ * Framebuffer: USE net.torvald.aa.AAFrame
  *
  * Background color is fixed; text color is variable
  *
  * Created by minjaesong on 16-09-07.
  */
-interface Terminal {
-    val width: Int
+interface Terminal : Teletype {
+    override val width: Int
     val height: Int
-    val coloursCount: Int
-    var cursorX: Int
+    override val coloursCount: Int
+    override var cursorX: Int
     var cursorY: Int
     var cursorBlink: Boolean
     var backColour: Int
@@ -27,13 +27,13 @@ interface Terminal {
     var lastInputByte: Int
 
     // to be used in UI
-    val displayW: Int
+    override val displayW: Int
     val displayH: Int
 
     fun getColor(index: Int): Color
-    fun update(gc: GameContainer, delta: Int)
-    fun render(gc: GameContainer, g: Graphics)
-    fun keyPressed(key: Int, c: Char)
+    override fun update(gc: GameContainer, delta: Int)
+    override fun render(gc: GameContainer, g: Graphics)
+    override fun keyPressed(key: Int, c: Char)
 
     // API calls
     fun setCursor(x: Int, y: Int)
@@ -44,14 +44,17 @@ interface Terminal {
      *  It is also not affected by the control sequences; just print them out as symbol */
     fun emitChar(c: Char)
     /** Prints a char and move cursor accordingly. */
-    fun printChar(c: Char)
+    override fun printChar(c: Char)
     /** Emits a string. Does not move cursor */
     fun emitString(s: String)
-    /** Emits a string and move cursor accordingly. */
+    /** Emits a string and move cursor accordingly, then do LF */
     fun printString(s: String, x: Int = cursorX, y: Int = cursorY)
+    /** Emits a string and move cursor accordingly. */
+    fun writeString(s: String, x: Int = cursorX, y: Int = cursorY)
     fun clear()
     fun clearLine()
-    fun scroll(amount: Int = 1)
+    override fun newLine()
+    override fun scroll(amount: Int)
     fun setColour(back: Int, fore: Int)
     fun resetColour()
     /**
@@ -60,7 +63,7 @@ interface Terminal {
      */
     fun beep(freq: Float = 1000f, duration: Int = 200)
     /** for "beep code" on modern BIOS. Pattern: - . */
-    fun beep(pattern: String)
+    override fun bell(pattern: String)
     /** Requires keyPressed() event to be processed.
      *
      *  null indicates the input stream is waiting for an input
diff --git a/src/net/torvald/terrarum/virtualcomputer/terminal/TerminalInputStream.kt b/src/net/torvald/terrarum/virtualcomputer/terminal/TerminalInputStream.kt
index 90a999192..24cc1d614 100644
--- a/src/net/torvald/terrarum/virtualcomputer/terminal/TerminalInputStream.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/terminal/TerminalInputStream.kt
@@ -6,10 +6,8 @@ import java.io.InputStream
 /**
  * Created by minjaesong on 16-09-10.
  */
-class TerminalInputStream(val term: Terminal) : InputStream() {
+class TerminalInputStream(val term: Teletype) : InputStream() {
     override fun read(): Int {
-        val ret = term.lastInputByte
-        term.lastInputByte = -1
-        return ret
+        return -1
     }
 }
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/virtualcomputer/terminal/TerminalPrintStream.kt b/src/net/torvald/terrarum/virtualcomputer/terminal/TerminalPrintStream.kt
index 67a1fe787..66d6c4045 100644
--- a/src/net/torvald/terrarum/virtualcomputer/terminal/TerminalPrintStream.kt
+++ b/src/net/torvald/terrarum/virtualcomputer/terminal/TerminalPrintStream.kt
@@ -6,10 +6,10 @@ import java.io.PrintStream
 /**
  * Created by minjaesong on 16-09-10.
  */
-class TerminalPrintStream(val term: Terminal) : PrintStream(TerminalOutputStream(term)) {
+class TerminalPrintStream(val term: Teletype) : PrintStream(TerminalOutputStream(term)) {
 
 }
 
-class TerminalOutputStream(val term: Terminal) : OutputStream() {
+class TerminalOutputStream(val term: Teletype) : OutputStream() {
     override fun write(b: Int) = term.printChar(b.and(0xFF).toChar())
 }
\ No newline at end of file