HP-41C T register duplication disabling

[Dave Britten]

(02-21-2020 03:27 PM)Sylvain Cote Wrote:  

(02-21-2020 02:34 PM)Dave Britten Wrote:  Not if X=Z, though. Then you still have T=Z.

He! Ho! you are cheating that constraint was not in the original request. LOL

That's an edge case, not a constraint. Simply guarantee that T does not equal Z, and leave X, Y, Z, and L as you found them. There are lots of edge cases for this - zeroes, alpha data, etc. - that make this a good deal trickier than it seems at first.