*> RPN is the only way to go. <...> In my humble opinion, HP15C is by far the best hand held computer ever made.*
When I was doing a lot of deeply embedded programming (8051s with 2k of ROM), my HP 16C was my ever-present companion. It's still in perfect condition, and I've supplemented it with an app on my phone, and an emulator on my PC, both of which get frequent use still. I also have a half-size fully functional model from SwissMicros <https://www.swissmicros.com/product/dm16l> - they have a lot of other drool-worthy products as well... On Friday, December 27, 2024 at 2:33:38 PM UTC-8 Leroy Jones wrote: > RPN is the only way to go. I have been using my trusty old HP15C since > it was new in 1984. > Wrote a short program for it that translates between decimal and > hexadecimal. > When displaying a hex number, (two) digit places are used to display > 11,12,13,14,15 (more commonly called A,B,C,D,E.F) > The program is set up so that when ever it is displaying one of those > jury-rigged hex results, the display blinks to remind me to read > it as hex. In my humble opinion, HP15C is by far the best hand held > computer ever made. > > On Friday, December 27, 2024 at 5:08:44 PM UTC-5 Mac Doktor wrote: > >> Some random thoughts... >> >> >> On Dec 27, 2024, at 3:20 PM, newxito <[email protected]> wrote: >> >> - What happens if I enter 12.999? Is that even possible? >> >> >> - For subsequent calculations, does it use the displayed value or the >> entered/calculated value with all decimal places? >> >> >> In fixed mode my RPN calculator displays everything you enter and then >> truncates that to two decimal places on both the display and internally. >> It's commonly used for financial calculations so I would assume it's >> rounded up. >> >> >> - How is a result like 1234567890.65 displayed? 34567890.65 and overflow? >> 1234567890 with no decimals? Something else? >> >> >> Normally you'd use scientific notation for floating point operations with >> lots of decimal places: >> >> 123.456 = 1.23456E2 >> >> The snag here is that you don't have "E" or a minus sign for numbers < 0 >> without alphanumeric tubes. Problematic. >> >> I suppose you could at least use neon lamps and optic fibers to create >> decimal points. Commas would be cute. >> >> >> What would really interest me is an RPN calculator. My beloved HP is out >> of production and used ones are going for $125 on eBay. I programmed in >> FORTH back in the day (Apple ][+; I still have it) and became very >> comfortable doing stack-based math. Once you get used to RPN you never go >> back. >> >> With alphanumeric tubes you can also do hexadecimal, the other thing that >> I'd like to be able to never go back from. I hope that last sentence makes >> sense. RPN, hex, I'm there. >> >> >> Terry Bowman, KA4HJH >> "The Mac Doctor" >> >> https://www.astarcloseup.com >> >> "Would you like to see the relevant data?"—343 Guilty Spark, *Halo 2* >> >> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/361e701f-73c9-4d1a-9d6f-779255b1a076n%40googlegroups.com.
