Add support scripts

brick/scripts/img.js

@@ -0,0 +1,33 @@
+#!/bin/sh
+
+let fs = require("fs")
+
+function build() {
+  let cr = fs.readFileSync("cram.bin")
+  if (cr.length > 10878976) {
+    console.log("too big")
+    return
+  }
+  let img = fs.readFileSync("boot.bin")
+  let off = 0x250000
+  if (img[off] != 0x45 || img[off + 1] != 0x3d) {
+    console.log("bad magic: " + img[off] + " / " + img[off+1])
+    return
+  }
+
+  cr.copy(img, off)
+
+  let kern = fs.readFileSync("piggy-patched.gzip")
+  off = 0x0005540f
+
+  if (img[off] != kern[0] || img[off+1] != kern[1]) {
+    console.log("bad kernel magic: " + img[off] + " / " + img[off+1])
+    return
+  }
+
+  kern.copy(img, off)
+
+  fs.writeFileSync("firmware.bin", img)
+}
+
+build()