diff --git a/FontTestGDX/src/TypewriterGDX.kt b/FontTestGDX/src/TypewriterGDX.kt
index 04ef9c2..bb0334f 100644
--- a/FontTestGDX/src/TypewriterGDX.kt
+++ b/FontTestGDX/src/TypewriterGDX.kt
@@ -10,6 +10,7 @@ import com.badlogic.gdx.graphics.OrthographicCamera
 import com.badlogic.gdx.graphics.Pixmap
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.badlogic.gdx.graphics.glutils.FrameBuffer
+import net.torvald.terrarum.gamecontroller.InputStrober
 import net.torvald.terrarumsansbitmap.gdx.CodepointSequence
 import net.torvald.terrarumtypewriterbitmap.gdx.TerrarumTypewriterBitmap
 import java.io.StringReader
@@ -24,6 +25,8 @@ class TypewriterGDX(val width: Int, val height: Int) : Game() {
 //    lateinit var frameBuffer: FrameBuffer
     lateinit var camera: OrthographicCamera
 
+    lateinit var inputStrober: InputStrober
+
     override fun create() {
         font = TerrarumTypewriterBitmap(
             "./assets/typewriter",
@@ -41,16 +44,26 @@ class TypewriterGDX(val width: Int, val height: Int) : Game() {
         camera.update()
 
 
-        Gdx.input.inputProcessor = TypewriterInput(this)
+        inputStrober = InputStrober(this)
     }
 
-    // uvamr ibwk/f ;rxubnfs
     private val textbuf: ArrayList<CodepointSequence> = arrayListOf(
-        CodepointSequence(listOf(49,50,29,49,34,29,41,46, 62 ,37,30,51,39,76,34).map { it + 0xF3000 })
+        CodepointSequence(listOf(
+            39,50,29, // kva (HANG_GONG)
+            42,31, // nc (HANG_SE)
+            74,48,51, // ;tw (HANG_BEOL)
+            62, // space
+            184,69,171,170, // >-ON (ASC_3-90)
+            62, // space
+            75,34, // 'f (HANG_TA)
+            40,34, // lf (HANG_JA)
+            39,32  // kd (HANG_GI)
+        ).map { it + 0xF3000 }),
+        CodepointSequence(/* new line */)
     )
 
     fun acceptKey(keycode: Int) {
-        println("[TypewriterGDX] Accepting key: $keycode")
+//        println("[TypewriterGDX] Accepting key: $keycode")
 
         if (keycode == Input.Keys.ENTER) {
             textbuf.add(CodepointSequence())
@@ -73,9 +86,13 @@ class TypewriterGDX(val width: Int, val height: Int) : Game() {
         batch.begin()
 
         batch.color = textCol
-        textbuf.forEachIndexed { index, s ->
-            font.draw(batch, s, 40f, 40f + 32*index)
+
+        try {
+            textbuf.forEachIndexed { index, s ->
+                font.draw(batch, s, 40f, 40f + 32 * index)
+            }
         }
+        catch (e: ConcurrentModificationException) {}
 
         batch.end()
     }
@@ -83,6 +100,7 @@ class TypewriterGDX(val width: Int, val height: Int) : Game() {
     override fun dispose() {
         font.dispose()
         batch.dispose()
+        inputStrober.dispose()
     }
 }
 
diff --git a/FontTestGDX/src/net/torvald/terrarum/gamecontroller/InputStrober.kt b/FontTestGDX/src/net/torvald/terrarum/gamecontroller/InputStrober.kt
new file mode 100644
index 0000000..437a38d
--- /dev/null
+++ b/FontTestGDX/src/net/torvald/terrarum/gamecontroller/InputStrober.kt
@@ -0,0 +1,394 @@
+package net.torvald.terrarum.gamecontroller
+
+import TypewriterGDX
+import com.badlogic.gdx.Gdx
+import com.badlogic.gdx.Input
+
+/**
+ * Created by minjaesong on 2021-11-06.
+ */
+class InputStrober(val typewriter: TypewriterGDX) {
+
+    companion object {
+        const val KEY_DOWN = 0
+        const val KEY_CHANGE = 1
+        const val N_KEY_ROLLOVER = 8
+    }
+
+    var KEYBOARD_DELAYS = longArrayOf(0L,250000000L,0L,25000000L,0L)
+    private var stroboTime = 0L
+    private var stroboStatus = 0
+    private var repeatCount = 0
+    private var oldKeys = IntArray(N_KEY_ROLLOVER) { 0 }
+    /** always Low Layer */
+//        private var keymap = IME.getLowLayerByName(App.getConfigString("basekeyboardlayout"))
+
+    private val thread = Thread { while (!Thread.interrupted()) {
+        if (Gdx.input != null) withKeyboardEvent()
+    } }
+
+    init {
+//        println("InputStrobe start")
+        thread.start()
+    }
+
+    fun dispose() {
+        thread.interrupt()
+    }
+
+    fun resetKeyboardStrobo() {
+        stroboStatus = 0
+        repeatCount = 0
+    }
+
+    // code proudly stolen from tsvm's TVDOS.SYS
+    private fun withKeyboardEvent() {
+        val keys = strobeKeys()
+        var keyChanged = !arrayEq(keys, oldKeys)
+        val keyDiff = arrayDiff(keys, oldKeys)
+
+//        println("Key strobed: ${keys.joinToString()}")
+
+        if (stroboStatus % 2 == 0 && keys[0] != 0) {
+            stroboStatus += 1
+            stroboTime = System.nanoTime()
+            repeatCount += 1
+
+            val shiftin = keys.contains(Input.Keys.SHIFT_LEFT) || keys.contains(Input.Keys.SHIFT_RIGHT)
+            val newKeysym0 = keysToStr(keyDiff)
+
+            val newKeysym = if (newKeysym0 == null) null
+            else if (shiftin && newKeysym0.size > 1 && newKeysym0[1]?.isNotBlank() == true) newKeysym0[1]
+            else newKeysym0[0]
+
+            val headKeyCode = (if (keyDiff.size < 1) keys[0] else keyDiff[0]).and(127) or (if (shiftin) 128 else 0)
+
+            if (repeatCount == 1) {
+                if (!keyChanged) {
+//                    println("KEY_DOWN '$keysym' ($headKeyCode) $repeatCount; ${keys.joinToString()}")
+//                App.inputStrobed(TerrarumKeyboardEvent(KEY_DOWN, keysym, headKeyCode, repeatCount, keys))
+                    typewriter.acceptKey(headKeyCode)
+                } else if (newKeysym != null) {
+//                    println("KEY_DOWC '$newKeysym' ($headKeyCode) $repeatCount; ${keys.joinToString()}")
+//                App.inputStrobed(TerrarumKeyboardEvent(KEY_DOWN, newKeysym, headKeyCode, repeatCount, keys))
+                    typewriter.acceptKey(headKeyCode)
+                }
+            }
+
+            oldKeys = keys // don't put this outside of if-cascade
+        }
+        else if (keyChanged || keys[0] == 0) {
+            stroboStatus = 0
+            repeatCount = 0
+
+            if (keys[0] == 0) keyChanged = false
+        }
+        else if (stroboStatus % 2 == 1 && System.nanoTime() - stroboTime < KEYBOARD_DELAYS[stroboStatus]) {
+            Thread.sleep(1L)
+        }
+        else {
+            stroboStatus += 1
+            if (stroboStatus >= 4)
+                stroboStatus = 2
+        }
+    }
+
+    private fun keysToStr(keys: IntArray): Array<String?>? {
+        if (keys.isEmpty()) return null
+        val headkey = keys[0]
+        return keymap[headkey]
+    }
+
+    private fun strobeKeys(): IntArray {
+        var keysPushed = 0
+        val keyEventBuffers = IntArray(N_KEY_ROLLOVER) { 0 }
+        for (k in 1..254) {
+            if (Gdx.input.isKeyPressed(k)) {
+                keyEventBuffers[keysPushed] = k
+                keysPushed += 1
+            }
+
+            if (keysPushed >= N_KEY_ROLLOVER) break
+        }
+        return keyEventBuffers
+    }
+
+    private fun arrayEq(a: IntArray, b: IntArray): Boolean {
+        for (i in a.indices) {
+            if (a[i] != b.getOrNull(i)) return false
+        }
+        return true
+    }
+
+    private fun arrayDiff(a: IntArray, b: IntArray): IntArray {
+        return a.filter { !b.contains(it) }.toIntArray()
+    }
+
+
+    private val keymap = arrayOf(arrayOf<String?>(""),arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>("<HOME>"),
+        arrayOf<String?>(null),
+        arrayOf<String?>("<CALL>"),
+        arrayOf<String?>("<ENDCALL>"),
+        arrayOf<String?>("0",")"),
+        arrayOf<String?>("1","!"),
+        arrayOf<String?>("2","@"),
+        arrayOf<String?>("3","#"),
+        arrayOf<String?>("4","$"),
+        arrayOf<String?>("5","%"),
+        arrayOf<String?>("6","^"),
+        arrayOf<String?>("7","&"),
+        arrayOf<String?>("8","*"),
+        arrayOf<String?>("9","("),
+        arrayOf<String?>("*"),
+        arrayOf<String?>("#"),
+        arrayOf<String?>("<UP>"),
+        arrayOf<String?>("<DOWN>"),
+        arrayOf<String?>("<LEFT>"),
+        arrayOf<String?>("<RIGHT>"),
+        arrayOf<String?>("<CENTER>"),
+        arrayOf<String?>("<VOL_UP>"),
+        arrayOf<String?>("<VOL_DOWN>"),
+        arrayOf<String?>("<POWER>"),
+        arrayOf<String?>("<CAMERA>"),
+        arrayOf<String?>("<CLEAR>"),
+        arrayOf<String?>("a","A"),
+        arrayOf<String?>("b","B"),
+        arrayOf<String?>("c","C"),
+        arrayOf<String?>("d","D"),
+        arrayOf<String?>("e","E"),
+        arrayOf<String?>("f","F"),
+        arrayOf<String?>("g","G"),
+        arrayOf<String?>("h","H"),
+        arrayOf<String?>("i","I"),
+        arrayOf<String?>("j","J"),
+        arrayOf<String?>("k","K"),
+        arrayOf<String?>("l","L"),
+        arrayOf<String?>("m","M"),
+        arrayOf<String?>("n","N"),
+        arrayOf<String?>("o","O"),
+        arrayOf<String?>("p","P"),
+        arrayOf<String?>("q","Q"),
+        arrayOf<String?>("r","R"),
+        arrayOf<String?>("s","S"),
+        arrayOf<String?>("t","T"),
+        arrayOf<String?>("u","U"),
+        arrayOf<String?>("v","V"),
+        arrayOf<String?>("w","W"),
+        arrayOf<String?>("x","X"),
+        arrayOf<String?>("y","Y"),
+        arrayOf<String?>("z","Z"),
+        arrayOf<String?>(",","<"),
+        arrayOf<String?>(".",">"),
+        arrayOf<String?>("<ALT_L>"),
+        arrayOf<String?>("<ALT_R>"),
+        arrayOf<String?>("<SHIFT_L>"),
+        arrayOf<String?>("<SHIFT_R>"),
+        arrayOf<String?>("<TAB>"),
+        arrayOf<String?>(" "),
+        arrayOf<String?>("<SYM>"),
+        arrayOf<String?>("<EXPLORER>"),
+        arrayOf<String?>("<ENVELOPE>"),
+        arrayOf<String?>("\n"),
+        arrayOf<String?>("\u0008"),
+        arrayOf<String?>("`","~"),
+        arrayOf<String?>("-","_"),
+        arrayOf<String?>("=","+"),
+        arrayOf<String?>("arrayOf<String?>(","{"),
+        arrayOf<String?>(")","}"),
+        arrayOf<String?>("\\","|"),
+        arrayOf<String?>(";",":"),
+        arrayOf<String?>("'","\""),
+        arrayOf<String?>("/","?"),
+        arrayOf<String?>("<AT>"),
+        arrayOf<String?>("<NUM_LOCK>"),
+        arrayOf<String?>("<HEADSETHOOK>"),
+        arrayOf<String?>("<FOCUS>"),
+        arrayOf<String?>("+"),
+        arrayOf<String?>("<MENU>"),
+        arrayOf<String?>("<NOTIFICATION>"),
+        arrayOf<String?>("<SEARCH>"),
+        arrayOf<String?>("<PLAY_PAUSE>"),
+        arrayOf<String?>("<STOP>"),
+        arrayOf<String?>("<NEXT>"),
+        arrayOf<String?>("<PREV>"),
+        arrayOf<String?>("<REW>"),
+        arrayOf<String?>("<FFWD>"),
+        arrayOf<String?>("<MUTE>"),
+        arrayOf<String?>("<PAGE_UP>"),
+        arrayOf<String?>("<PAGE_DOWN>"),
+        arrayOf<String?>("<PICTSYMBOLS>"),
+        arrayOf<String?>("<SW:>TCH_CHARSET>"),
+        arrayOf<String?>("<:A:>"),
+        arrayOf<String?>("<:B:>"),
+        arrayOf<String?>("<:C:>"),
+        arrayOf<String?>("<:X:>"),
+        arrayOf<String?>("<:Y:>"),
+        arrayOf<String?>("<:Z:>"),
+        arrayOf<String?>("<:L1:>"),
+        arrayOf<String?>("<:R1:>"),
+        arrayOf<String?>("<:L2:>"),
+        arrayOf<String?>("<:R2:>"),
+        arrayOf<String?>("<:TL:>"),
+        arrayOf<String?>("<:TR:>"),
+        arrayOf<String?>("<:START:>"),
+        arrayOf<String?>("<:SELECT:>"),
+        arrayOf<String?>("<:MODE:>"),
+        arrayOf<String?>("<ESC>"),
+        arrayOf<String?>("<DEL>"),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>("<CAPS_LOCK>"),
+        arrayOf<String?>("<SCROLL_LOCK>"),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>("<PRINT_SCREEN_SYS_RQ>"),
+        arrayOf<String?>("<PAUSE_BREAK>"),
+        arrayOf<String?>(null),
+        arrayOf<String?>("<END>"),
+        arrayOf<String?>("<INSERT>"),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>("<CTRL_L>"),
+        arrayOf<String?>("<CTRL_R>"),
+        arrayOf<String?>("<F1>"),
+        arrayOf<String?>("<F2>"),
+        arrayOf<String?>("<F3>"),
+        arrayOf<String?>("<F4>"),
+        arrayOf<String?>("<F5>"),
+        arrayOf<String?>("<F6>"),
+        arrayOf<String?>("<F7>"),
+        arrayOf<String?>("<F8>"),
+        arrayOf<String?>("<F9>"),
+        arrayOf<String?>("<F10>"),
+        arrayOf<String?>("<F11>"),
+        arrayOf<String?>("<F12>"),
+        arrayOf<String?>("<NUM_LOCK>"),
+        arrayOf<String?>("0"),
+        arrayOf<String?>("1"),
+        arrayOf<String?>("2"),
+        arrayOf<String?>("3"),
+        arrayOf<String?>("4"),
+        arrayOf<String?>("5"),
+        arrayOf<String?>("6"),
+        arrayOf<String?>("7"),
+        arrayOf<String?>("8"),
+        arrayOf<String?>("9"),
+        arrayOf<String?>("/"),
+        arrayOf<String?>("*"),
+        arrayOf<String?>("-"),
+        arrayOf<String?>("+"),
+        arrayOf<String?>("."),
+        arrayOf<String?>("."),
+        arrayOf<String?>("\n"),
+        arrayOf<String?>("="),
+        arrayOf<String?>("("),
+        arrayOf<String?>(")"),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>(null),
+        arrayOf<String?>("<:CIRCLE:>")
+    )
+
+}
+
+
+data class TerrarumKeyboardEvent(
+    val type: Int,
+    val character: String?, // representative key symbol
+    val headkey: Int, // representative keycode
+    val repeatCount: Int,
+    val keycodes: IntArray
+)
\ No newline at end of file
diff --git a/assets/typewriter/typewriter_ko_3set-390.tga b/assets/typewriter/typewriter_ko_3set-390.tga
index a139a30..29c44da 100644
Binary files a/assets/typewriter/typewriter_ko_3set-390.tga and b/assets/typewriter/typewriter_ko_3set-390.tga differ
diff --git a/src/net/torvald/terrarumtypewriterbitmap/gdx/TerrarumTypewriterBitmap.kt b/src/net/torvald/terrarumtypewriterbitmap/gdx/TerrarumTypewriterBitmap.kt
index 34b154f..9cc3d46 100644
--- a/src/net/torvald/terrarumtypewriterbitmap/gdx/TerrarumTypewriterBitmap.kt
+++ b/src/net/torvald/terrarumtypewriterbitmap/gdx/TerrarumTypewriterBitmap.kt
@@ -255,6 +255,7 @@ class TerrarumTypewriterBitmap(
     }
 
     private val pixmapOffsetY = 10
+    private val linotypePad = 16
     private var flagFirstRun = true
     private var textBuffer = CodepointSequence(256)
     private lateinit var tempLinotype: Texture
@@ -303,7 +304,7 @@ class TerrarumTypewriterBitmap(
 //                resetHash(charSeq, x.toFloat(), y.toFloat())
 
 
-                val _pw = posXbuffer.last()
+                val _pw = posXbuffer.last() + 2*linotypePad
                 val _ph = TerrarumSansBitmap.H + (pixmapOffsetY * 2)
                 if (_pw < 0 || _ph < 0) throw RuntimeException("Illegal linotype dimension (w: $_pw, h: $_ph)")
                 val linotypePixmap = Pixmap(_pw, _ph, Pixmap.Format.RGBA8888)
@@ -333,7 +334,7 @@ class TerrarumTypewriterBitmap(
                             val texture = sheets[sheetID]?.get(sheetX, sheetY)
 
                             texture?.let {
-                                linotypePixmap.drawPixmap(it, posX, posY + pixmapOffsetY, renderCol)
+                                linotypePixmap.drawPixmap(it, posX + linotypePad, posY + pixmapOffsetY, renderCol)
                             }
 
                         }
@@ -360,11 +361,11 @@ class TerrarumTypewriterBitmap(
 
 
             if (!flipY) {
-                batch.draw(tempLinotype, x.toFloat(), (y - pixmapOffsetY).toFloat())
+                batch.draw(tempLinotype, (x - linotypePad).toFloat(), (y - pixmapOffsetY).toFloat())
             }
             else {
                 batch.draw(tempLinotype,
-                    x.toFloat(),
+                    (x - linotypePad).toFloat(),
                     (y - pixmapOffsetY + (tempLinotype.height)).toFloat(),
                     (tempLinotype.width.toFloat()),
                     -(tempLinotype.height.toFloat())
diff --git a/work_files/typewriter_input/hangul_3set_glyphs_master.kra b/work_files/typewriter_input/hangul_3set_glyphs_master.kra
index 53255d9..8d3ad56 100644
Binary files a/work_files/typewriter_input/hangul_3set_glyphs_master.kra and b/work_files/typewriter_input/hangul_3set_glyphs_master.kra differ
diff --git a/work_files/typewriter_input/typewriter_ko_3set-390.psd b/work_files/typewriter_input/typewriter_ko_3set-390.psd
index 862e9f1..36694b9 100644
Binary files a/work_files/typewriter_input/typewriter_ko_3set-390.psd and b/work_files/typewriter_input/typewriter_ko_3set-390.psd differ
diff --git a/work_files/typewriter_input/typewriter_ko_3set_glyphs_resized.kra b/work_files/typewriter_input/typewriter_ko_3set_glyphs_resized.kra
index 7f8add5..c845858 100644
Binary files a/work_files/typewriter_input/typewriter_ko_3set_glyphs_resized.kra and b/work_files/typewriter_input/typewriter_ko_3set_glyphs_resized.kra differ