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

[bxparks]

(03-15-2024 12:26 PM)Dave Britten Wrote:  They don't appear to. I just tried 1 ft^3->in^3 on one of my TI-85s (ROM 10.0) and I get an even 1728. I don't have my 19BII close at hand at the moment, but I tried on the HP Calc application on my 200LX (basically a 19BII), and also got 1728.

Interesting. HP and TI must be using higher precision conversion constants than the Casios.

(03-15-2024 12:26 PM)Dave Britten Wrote:  By the way, I don't think I've seen this mentioned yet, but if anybody wants to make RPN83P the primary operating environment on their 83/84, just install TI's Start-Up Customization app:
https://education.ti.com/en/software/det...tomization

Yup, I mention this auto-start capability in my User Guide:
https://github.com/bxparks/rpn83p/blob/d...auto-start

(03-15-2024 12:26 PM)Dave Britten Wrote:  Also I was thinking, rather than implement keystroke programming in RPN83P, how difficult would it be to launch a TI-Basic program from within the app? You could simply copy the stack to variables X/Ans, Y, Z, T, and L, and store the registers into a list (e.g. "REGS"), then bring the values back in after the TI-Basic program exits. No clue if the TI OS makes it possible to do this from within an assembly-language app.

Others have suggested this feature. Various "shell" programs (DoorsCS, MirageOS, Ion) do exactly this, so it's technically possible. The problem is finding someone who has the time, energy, and technical knowledge to implement this. Realistically that "someone" won't be me, at least not within the next ~2 years, but I'm willing to work with someone who has the talent for this kind of thing.