Paul Remde wrote:
Hi Max, Please clarify. How could it be possible to mess with the LXNAV
LX8000, LX8080 and LX9000 firmware?

The LXNav products are just Linux PCs, and it is easy to install a
customized firmware.

The LXNav firmware update comes with a shell script that gets executed
on the LX8000 (autorun.sh), and that would be the easiest hook of all
to get custom code in.

Once you have your custom AH code in, you can easily run it as a Linux
daemon, overlaying its data on the Linux frame buffer (/dev/fb0).

To detect such a hack, you would need to inspect all of the LX8000's
memory, it would be as hard as detecting a computer virus or a
rootkit. In other words: practically impossible for a competition to
do.

(The same is true for any other flight computer, the LX8000 is just an
example, because my club has one and I know well how the firmware
works)

In your first reply I assumed that you were saying LX8000 when you meant
LK8000.

No. The LK8000 name was explicitly choosen to get mixed up with
LX8000, to benefit from its good name, but no I really meant LXNav
LX8000.

Max