35S Insanity

[Steve Simpkin]

(12-01-2024 11:49 AM)dm319 Wrote:  ...
The talk about Kinpo writing 35s and 33s on 6502 platform makes me think the Rogue 12c was made by Kinpo?

Perhaps. According to Wikipedia, the HP-12C Platinum is a complete reimagination of the HP-12C that was manufactured by Kinpo Electronics for HP. Unlike the HP-12C which, (more or less) run the same 1981 firmware on a real or emulated HP "NUT" processor, the HP-12C Platinum has completely rewritten software running on a 6502 processor core.,
https://en.wikipedia.org/wiki/HP-12C#HP_.../_Prestige

Additional HP-12C platinum origin information from Robert Prosperi (rprosperi):
"The 12CP was created to add a near-12C financial calculator with algebraic operation to the product lineup as the EU market (for financial use at least) were not willing to adopt RPN-based models. Since grafting-on algebraic features was no longer feasible (Nut CPU development was all done in assembler) they chose to reimplement the machine from scratch in C on a readily available and cheap CPU, and so.... that's why while it is very similar, the internal math and results are not identical."
https://www.hpmuseum.org/forum/thread-22...#pid190353

Additional information:
http://www.brouhaha.com/~eric/hpcalc/voy...iants.html

https://www.hpcc.org/datafile/V22N3/platinum.pdf