more movie format experimentations

assets/disk0/decodemov.js

@@ -137,7 +137,13 @@ let framesRendered = 0
 //serial.println(readCount) // must say 18
 //serial.println(`Dim: (${width}x${height}), FPS: ${fps}, Frames: ${frameCount}`)
 
+if (type != 0) {
+    printerrln("Not a type 0 mov")
+    return 1
+}
+
 let fbuf = sys.malloc(FBUF_SIZE)
+graphics.setGraphicsMode(0)
 
 let startTime = sys.nanoTime()
 while (framesRendered < frameCount) {