KBD2 test in HP48SX

[rprosperi]

(05-21-2014 06:31 AM)Didier Lachieze Wrote:  http://lmgtfy.com/?q=KBD2+test+in+HP48SX, see the first result ...

LOL!! Today, the first result is this very thread!

I think this is the one that was first when Didier posted.

Thanks for that Didier, I knew I saw it somewhere. I recalled the upper diagonal, but not the lower one so could not get it to complete.