Document jumper settings for kwboot

Change-Id: I33d9e4a209d6931fd3d94a30159b6c0bed06de5f
diff --git a/README.md b/README.md
index 7df94e9..bafd8a0 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,8 @@
 On development boards with a µSD card slot, simply `dd` the `images/sdcard.img` to the SD card and boot from there.
 
 On a regular Clearfog Base with an eMMC, one has to bootstrap the device first.
-If recovering a totally bricked board, one can use the `kwboot` command to upload the initial U-Boot via the console:
+If recovering a totally bricked board, one can use the `kwboot` command to upload the initial U-Boot via the console.
+Ensure that the jumpers are set to `1 1 1 1 0` (default for eMMC boot is `0 0 1 1 1`), and then use U-Boot's `kwboot` tool:
 
 ```sh
 ./tools/kwboot -b ./u-boot-spl.kwb -t -p /dev/ttyUSB0