diff --git a/assets/emittest.js b/assets/emittest.js
new file mode 100644
index 0000000..89a6732
--- /dev/null
+++ b/assets/emittest.js
@@ -0,0 +1,11 @@
+con.clear();
+con.move(1,1);
+for (let i = 0; i < 2048; i++) {
+    if (i < 1024) con.color_pair(239, 0); else con.color_pair(0, 239);
+
+    let cx = (i%80)+1;
+    let cy = ((i/80)|0)+1;
+    //serial.printerr(cx+","+cy);
+    con.move(cy,cx);
+    con.addch(i%256);
+}
\ No newline at end of file
diff --git a/assets/tbas/basic.js b/assets/tbas/basic.js
index 05e8d94..5f50c8d 100644
--- a/assets/tbas/basic.js
+++ b/assets/tbas/basic.js
@@ -549,7 +549,7 @@ bStatus.builtin = {
 
     let varname = asgnObj.asgnVarName
     // check for variable name collision (e.g. 10 K=1TO10 \n 20 FOR I=K should work but 20 FOR K=K must not)
-    if (bStatus.vars[varname] !== undefined)) throw lang.dupDef(lnum, varname);
+    if (bStatus.vars[varname] !== undefined) throw lang.dupDef(lnum, varname);
 
     // assign new variable
     bStatus.vars[varname] = asgnObj.asgnValue
diff --git a/cp437_fira_code.kra b/cp437_fira_code.kra
new file mode 100644
index 0000000..eb45025
--- /dev/null
+++ b/cp437_fira_code.kra
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f5b072f194909e4952f5ae26242956a8780767777df5a15df3c5cd07f06de5df
+size 92849
diff --git a/cp437_fira_code.png b/cp437_fira_code.png
new file mode 100644
index 0000000..bcec388
Binary files /dev/null and b/cp437_fira_code.png differ
diff --git a/src/net/torvald/tsvm/AppLoader.java b/src/net/torvald/tsvm/AppLoader.java
index 8eeae89..aa9d2ab 100644
--- a/src/net/torvald/tsvm/AppLoader.java
+++ b/src/net/torvald/tsvm/AppLoader.java
@@ -30,8 +30,8 @@ public class AppLoader {
 
 
         // val vm = VM(64.kB(), TheRealWorld(), arrayOf(GenericBios))
-        //VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{GenericBios.INSTANCE});
-        VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{BasicBios.INSTANCE, BasicRom.INSTANCE});
+        VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{GenericBios.INSTANCE});
+        //VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{BasicBios.INSTANCE, BasicRom.INSTANCE});
         new LwjglApplication(new VMGUI(vm, appConfig), appConfig);
     }
 
diff --git a/src/net/torvald/tsvm/peripheral/GraphicsAdapter.kt b/src/net/torvald/tsvm/peripheral/GraphicsAdapter.kt
index b997482..c5ee8ac 100644
--- a/src/net/torvald/tsvm/peripheral/GraphicsAdapter.kt
+++ b/src/net/torvald/tsvm/peripheral/GraphicsAdapter.kt
@@ -323,7 +323,7 @@ open class GraphicsAdapter(val vm: VM, val config: AdapterConfig) :
                 for (i in 0 until TEXT_COLS * TEXT_ROWS step 4) {
                     spriteAndTextArea.setInt(memTextForeOffset + i, foreBits)
                     spriteAndTextArea.setInt(memTextBackOffset + i, backBits)
-                    spriteAndTextArea.setInt(memTextOffset + i, -1)
+                    spriteAndTextArea.setInt(memTextOffset + i, 0)
                 }
                 spriteAndTextArea.setShort(memTextCursorPosOffset, 0)
             }
@@ -763,7 +763,7 @@ open class GraphicsAdapter(val vm: VM, val config: AdapterConfig) :
 
         val DEFAULT_CONFIG_COLOR_CRT = AdapterConfig(
             "crt_color",
-            560, 448, 80, 32, 254, 255, 256.kB(), "./FontROM7x14.png", 0.32f
+            560, 448, 80, 32, 254, 255, 256.kB(), "./cp437_fira_code.png", 0.32f
         )
         val DEFAULT_CONFIG_PMLCD = AdapterConfig(
             "pmlcd_inverted",
@@ -882,6 +882,8 @@ uniform vec2 tilesInAtlas = ivec2(16.0, 16.0);
 uniform vec2 atlasTexSize = ivec2(128.0, 224.0);
 vec2 tileSizeInPx = atlasTexSize / tilesInAtlas; // should be like ivec2(16, 16)
 
+float fontGamma = 1.8;
+
 ivec2 getTileXY(int tileNumber) {
     return ivec2(tileNumber % int(tilesInAtlas.x), tileNumber / int(tilesInAtlas.x));
 }
@@ -897,6 +899,15 @@ int getTileFromColor(vec4 color) {
     return _colToInt(color) & 0xFFFFF;
 }
 
+vec4 fontMix(vec4 zero, vec4 one, float scale) {
+    return vec4(zero.r * (1 - pow(scale, fontGamma)) + one.r * pow(scale, fontGamma),
+                zero.g * (1 - pow(scale, fontGamma)) + one.g * pow(scale, fontGamma),
+                zero.b * (1 - pow(scale, fontGamma)) + one.b * pow(scale, fontGamma),
+                zero.a * (1 - pow(scale, fontGamma)) + one.a * pow(scale, fontGamma)
+               );
+}
+
+
 void main() {
 
     // READ THE FUCKING MANUAL, YOU DONKEY !! //
@@ -933,7 +944,8 @@ void main() {
     vec4 tileCol = texture2D(tilesAtlas, finalUVCoordForTile);
 
     // apply colour. I'm expecting FONT ROM IMAGE to be greyscale
-    gl_FragColor = mix(backColFromMap, foreColFromMap, tileCol.r);
+    // TODO non-linear mix with gamma 2.2
+    gl_FragColor = fontMix(backColFromMap, foreColFromMap, tileCol.r);
 }
 """.trimIndent()
 
diff --git a/src/net/torvald/tsvm/peripheral/TexticsAdapter.kt b/src/net/torvald/tsvm/peripheral/TexticsAdapter.kt
index e7a0cc6..ef123f4 100644
--- a/src/net/torvald/tsvm/peripheral/TexticsAdapter.kt
+++ b/src/net/torvald/tsvm/peripheral/TexticsAdapter.kt
@@ -7,14 +7,14 @@ import net.torvald.tsvm.kB
 
 class TexticsAdapter(vm: VM, theme: String) : GraphicsAdapter(vm, AdapterConfig(
     "crt_green",
-    720,
-    400,
+    560,
+    448,
     80,
-    25,
+    32,
     239,
     0,
     256.kB(),
-    "./tty.png",
+    "./cp437_fira_code.png",
     0.7f
 )) {