The HP39gII is coming our way now.
Many of our current customers have asked for it. while it is not RPN, it is really HP - much more that many of the external jobs contracted by HP in the last years.
The firmware has been designed from scratch by the HP team - unlike many other calculators from several years ago, like the HP 35s and the HP 17bII, which wre developed outside onder HP specification. This can be seen in features like the unsolved bugs of the hp35s, or the poor implementation of the HP 17bII+ solver, applying brute force techniques, compared with the original hp17bII "pseudo-symbolic" 2-pass solver). It is worth noting that the last generation of HP calculators is again "pure HP" in its conception and development: the 20b and 30b on one hand, the new voyagers (12c and 15c based on an ARN core as well) and the latest HP10bII+.
According to the development team, the HP38gII is the start of a platform-independent codebase for future HP graphical calculators. Having Cyrille and Tim in the team, we know that the HP heritage will at least be respected, even if marketing decisions do not allow them to include RPN in all products (apparently, there are products where marketing forbud to include RPN as an option, even a hidden undocumented feature !!)
Fortunately, RPN is still offered on most calculators, albeit as an option (with the exception of the true "oldies" of the line, the hp12c and the hp15c, where it is the _only_ option)
The work performed by HP with the voyagers helped them to create ARM-based products that do not swallow batteries. While it was close to impossible to achieve the original Voyagers' battery performance (some units have been known to hold their charge for over 15 years), they are by far much better than other current calculators like the hp50g in battery life. My HP15 is approaching 6 months of intense use without any hint of battery exhaustion, while batterioes never lasted more than two months of use for my 50g.
This good energy management is shown in the new calculator. According to Tim Wessman, the 4 AAA batteries are working in parallel, not in series, and the calculator can run with just one in an emergency. He claims to have tested units over 500 hours of continuous use with a single set of batteries.
As soon as I receive my sample, I will test it and you'll be the second to see the results - the first will be the subscribers to our newsletter (to receive it, you just need to register as user) And stay tuned: as soon as the financials are set, I will put the machine on sale!