H->HMS conversion HP-15C vs. HP42S vs HP67

[teenix]

(09-09-2018 05:10 AM)Joe Horn Wrote:  Unfortunately Pekis' HMS formula suffers from the "60 second bug" which several HP's also suffered from. If you input 9.99999999999 (12 digits total) into any 12-digit HP, and run Pekis' HMS formula, you get exactly 9:59:60 as the result. Should be 9:59:59.9999999 of course.

The HP67 gives

9.5959999999 in DSP 9 mode
9.5960 in DSP 4 mode
9.60 in DSP2 mode
10 in DSP 0 mode

It is just following its normal display rounding code. In this case, it doesn't know that certain digits are hours, minutes, or seconds.

cheers

Tony