wrote:

OK. I have to ask. How do you get the data
from the KLN-90 to the 396, and can you do
it with a KLN-88?

Now that Garmin have fixed their firmware so they can accept King
serial data format, you just connect the moving map RS-232 output from
the KLN-90 into the 396's serial input, and set the 396 for Aviation
In. Ought to work with a KLN-88, but I don't have data on that one.