diff --git a/assets/disk0/decodeipf.js b/assets/disk0/decodeipf.js
index 07dd59d..5fe128a 100644
--- a/assets/disk0/decodeipf.js
+++ b/assets/disk0/decodeipf.js
@@ -212,17 +212,6 @@ for (let blockX = 0; blockX < Math.ceil(imgw / 4.0); blockX++) {
     let cocg4 = readByte()
     let y4 = readShort()
 
-    if (blockX == 0 && blockY == 0) {
-        serial.println(`cocg: ${(cocg1 & 15).toString(16)} ${((cocg1 >>> 4) & 15).toString(16)}`)
-        serial.println(`y: ${y1.toString(16)}`)
-        serial.println(`cocg: ${cocg2.toString(16)}`)
-        serial.println(`y: ${y2.toString(16)}`)
-        serial.println(`cocg: ${cocg3.toString(16)}`)
-        serial.println(`y: ${y3.toString(16)}`)
-        serial.println(`cocg: ${cocg4.toString(16)}`)
-        serial.println(`y: ${y4.toString(16)}`)
-    }
-
     let a1 = 65535; let a2 = 65535; let a3 = 65535; let a4 = 65535
 
     if (hasAlpha) {
diff --git a/assets/disk0/encodeipf.js b/assets/disk0/encodeipf.js
index a2b0efe..ac5128e 100644
--- a/assets/disk0/encodeipf.js
+++ b/assets/disk0/encodeipf.js
@@ -73,11 +73,11 @@ Image is divided into 4x4 blocks and each block is serialised, then the entire f
  */
 
 if (!exec_args[2]) {
-    printerrln("Usage: encodeipf input.jpg output.ipf")
+    printerrln("Usage: encodeipf input.jpg output.ipf [/noalpha]")
     return 1
 }
 
-let configUseAlpha = true
+let configUseAlpha = !(exec_args[3].toLowerCase() == "/noalpha")
 
 filesystem.open("A", exec_args[1], "R")
 
@@ -104,6 +104,33 @@ println(`Dim: ${imgw}x${imgh}, channels: ${channels}, Has alpha: ${hasAlpha}`)
 let writeCount = 0
 let writeBuf = sys.malloc(blockSize * ((hasAlpha) ? 20 : 12))
 
+let bayerKernels = [
+    [
+        0,8,2,10,
+        12,4,14,6,
+        3,11,1,9,
+        15,7,13,5,
+    ],
+    [
+        8,2,10,0,
+        4,14,6,12,
+        11,1,9,3,
+        7,13,5,15,
+    ],
+    [
+        7,13,5,15,
+        8,2,10,0,
+        4,14,6,12,
+        11,1,9,3,
+    ],
+    [
+        15,7,13,5,
+        0,8,2,10,
+        12,4,14,6,
+        3,11,1,9,
+    ]
+].map(it => { it.map(it => { (it + 0.5) / 16 }) })
+
 function chromaToFourBits(f) {
     let r = Math.round(f * 8) + 7
     return (r < 0) ? 0 : (r > 15) ? 15 : r