HP 50g: Mantissa of an Extended Real

[DavidM]

(10-07-2017 06:19 PM)Gerald H Wrote:  ...negative numbers remain negative.

I'll admit that I didn't test this out extensively, but I did try at least one negative number and the sign was changed to positive (as it should have been, due to the DAT0=C P step). What did you test with this that didn't result in a positive mantissa?