HP calcs with clock

[Katie Wasserman]

(07-16-2014 05:50 PM)Mark Hardman Wrote:  

(07-16-2014 07:31 AM)x34 Wrote:  I wonder, which HP calculator models do have built-in RTCs?

Let's also not forget Katie's excellent hardware/software clock for the 97/97S.

Enhance your HP-97 -- Add a Clock and More

I guess it is "built-in" technically, but not natively.

Did you build this for your calculator?

Thanks for the reference!