Starting HP25 programs with numbers

[PANAMATIK]

(11-24-2017 12:14 PM)Dieter Wrote:  BTW, comparing both machines, it is nice to see what a difference one year makes: The 1976 HP67 already uses 13-digit internal precision while the HP25 still has to rely on merely 10 digits for internal intermediate results. Consequently the infamous 3²⁰¹ example has only 6 (!) correct digits (after rounding).

I don't think the HP-67 has higher internal precision than the HP-25, both represent a number as 10 digit mantissa and 3 digit exponent with sign. Perhaps the 15-digit HP-67 display suggests a higher precision. It can display the full mantissa all the time, while the 12-digit HP-25 display shares the display between mantissa and exponent, it shows only 8 mantissa digits when an exponent is displayed.

Bernhard