plus42-dec
An Enhanced HP-42S Calculator Simulator (decimal version)
Plus42 is an advanced scientific programmable calculator, based on Free42.
Free42, in turn, is a complete re-implementation of the HP-42S scientific
programmable RPN calculator, which was made from 1988 until 1995 by
Hewlett-Packard. Free42 is a complete rewrite and contains no HP code
whatsoever.
plus42 Decimal (plus42dec) uses the Intel Decimal Floating-Point Math Library;
it uses IEEE-754-2008 quadruple precision decimal floating point, which consumes
16 bytes per number, and gives 34 decimal digits of precision, with exponents
ranging from -6143 to +6144.
https://thomasokken.com/plus42/
Utility