[Arm-netbook] Verifying firmware

[Benson Mitchell]

Note that there is no electrical switch in even standard SD -- that
advisory "switch" is just a plastic slider whose position is sensed by
an actual switch in the card slot (if so equipped). So you'd need to
find a ridiculously tiny switch to fit in an SD card case, and find a
way to make that plastic slider operate it.

If the card is small/cheap enough, you might just put a loop of fine
jumper wire in series with write-enable, and leave it hanging out of
the case -- snip/tear the wire for read-only. Or even better -- a
little window in the case exposes a section of PCB with a cut trace.
Solder/de-solder as many times as you like.

Benson