How to identify HP-49g+ production runs

[johnb]

(11-05-2022 02:10 PM)Eric Rechlin Wrote:  

(11-05-2022 01:40 PM)johnb Wrote:  Can the 50g run libraries that were written for the 49g+ ?

The software is identical between the 49g+ and 50g. Most ROMs even work on both calculators. They are essentially the same calculator. Anything written for the 49g+ should work on the 50g.

Outstanding, thanks!

One of the reasons I'm wanting to add [now, either a 49g+ or 50g] to my collection is that I have a recurrent/passing interest in Interval Arithmetic. I've written a library for the 48g in RPL, but I reasoned the math rules from scratch. It was fun while I had the time, but there are rough edges where I've realized I got it wrong... and other areas (such as trancendentals) that I hadn't addressed yet.

I've learned a fellow member here has an Interval Arithmetic library for the 49g+, so I've been thinking that a fun project would be to get both the hardware and software, and do a port to the 48g, maybe merging it with some of the features of my existing library. (My library, unlike many, tracks 3 values, not two: low end of the range, high end of the range, and "most likely value." There's also a "display" function that parses those 3 values into several different representations: "X±Eavg", "[low,hi]: distance", "X -e1/+e2", etc.)

regards!
--john baldwin