Just curious, have Cessnas ever used a Bendix King 568 CDU and computer?

I have bought a few of these CDU's over the years when they appear dirt cheap on eBay and even got the computer with it. I cannot do much as the computer stores the flight information in static ram and you need a disk to update it but its a fairly conventional system. The CDU is just a Z80 CPU that acts as a terminal and the computer is just a Z8000 with a bunch of ram.

But as I look around at different aircraft panels I never see one that uses it. I am sure its used in big 2 prop planes but even the few images I have seen online just cannot figure out where it was ever used. Just curious if you know how popular it ever was.

Oh, if you want manuals I got them, I have started to be a fan of Bendix King because some of those patents are just crazy good. Like someone was really proud of the work put in. Need to get my document scanner up.