[proposal] for RPN modifications

[Craig Thomas]

(06-18-2014 04:53 PM)Angus Wrote:  Tim, I would say we would like to have the cmd line behave as x-reg. Maybe that is unclear. If you enter some value You can directly swap it with the last stack item.
I don't understand why the stack depth is of importance. The last input is defined x, the second last y. No matter how many levels reside above that. So x IS the cmd line if you want. All most people want from rpn is to save keystrokes. So any unwanted enter would be gladly avoided.
I hope my explanation is well.

I don't get this either. It isn't complicated unless you've never used a calculator like the HP48 or older?

The x and y register concept is soooooo simple and makes a couple of important keyboard functions pretty much self-explanatory as long as the buttons are tied to the concept, when using RPN. Tim W. repeatedly has made it clear that this doesn't figure into his thinking.

The HP-48 series is an excellent example of a greater than 4-level stack oriented machine that perfectly implements this concept.