RPN83P: RPN calculator for TI-83+ TI-84+ inspired by HP-42S

[TomC]

Firstly - GreatWork!!! - to have our favorite machines work on readily available hardware.

My comments/wishes:
1. Complex Number Support
2. Keystroke programming (like 42)
3. More data memory (I regularly use 100 complex registers on my DM42).
4. Support for the 84'C' type machines (I've come to enjoy these backlit displays).

Thanks again for your fine work,
TomC

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(11-22-2023 02:43 AM)bxparks Wrote:  

(11-21-2023 10:02 PM)floppy Wrote:  Ouch. Perhaps you just signed the death of my HP35S (no exchange with PC possible with that weird one). Now the TI84+ is on my amazon list. In few days will probably make its way to me. Then after install/test probably bye bye HP35S via eBay.

Texas Instruments seems to have thoroughly abused the "TI-84 Plus" brand. There are at least 4 calculators by that name:

* TI-84 Plus
* TI-84 Plus Silver Edition
* TI-84 Plus C Silver Edition
* TI-84 Plus CE

Plus the "Python" versions of some of those. Some of them are quite incompatible with each other. Make sure you are getting what you think you are getting.

The RPN83P works with the TI-84 Plus, and TI-84 Plus SE (and the TI-83 Plus), but *not* the TI-84 Plus C SE, and most *definitely* not the TI-84 Plus CE.

With regards to the HP-35S, it all depends on what you want the calculator for. Most reviewers seem to love the retro-quality of the 35S, with echoes of the old Voyager (10C to 15C) and Pioneer series (20S, 32S, 42S). All of its functions seem to be available directly through the buttons instead of menus. Some people really like that. I'd probably enjoy having this calculator, but not at the prices that I see on eBay.

(11-21-2023 10:02 PM)floppy Wrote:  The TI-84 Plus C Silver Edition would be ok? lt seems to be the highest spec version.

I don't have this calculator, but everything I read on the internet says, *never* get this calculator. It uses the same 15 MHz Z80 processor as the 84+ and 84+SE, but has a 320×240 color screen that requires a much higher CPU and memory resources. The Z80 processor apparently cannot render the fonts fast enough and does not have enough bandwidth to push the bits quickly enough to the LCD screen.