stack lift and change sign

[Les Bell]

(08-10-2014 01:50 PM)Katie Wasserman Wrote:  The fact that it depends on the mode of the 16C I find particularly disturbing. This was an extremely carefully engendered calculator. To me this means that one should never count on the stack lift working (or not) after a CHS.

I suspect that CHS in integer mode on the 16C got a great deal of attention because of the differences between unsigned, one's complement (which has both +0 and -0) and two's complement notation. On the other hand, I expect that the floating point code for the 16C was simply grabbed from the other Voyagers.