Correct layout of e^/LN/10^/LOG?

[Matt Agajanian]

(10-23-2024 12:51 PM)Johnh Wrote:  Flicking through my emulator collection....

Seems to me that just as trig functions such as sin and arcsin etc, are on the same key, then Ln and e^x should be on the same key, as should Log10 and 10^x. It's not obvious though, whether the log functions should lead, or the e^x and 10^x, and the other be a shifted key. Even just within Hp's, this varies. Voyagers have the e^ x and 10^x as primary keys, while most others before and after put the log functions as primary

It depends a bit on the general scheme of whether there is one or two shift keys. Or like in Ti58/59 a shift and and an Inv key, so that 10^x took three keys presses.

I'll manage, and I can adapt to anything logical!

On the TI-58/59 point, I’m just curious why you find it a “yeah. I could live with that” since 10^x and e^x require an INV prefix, there’s the extra keystroke of INV which would take extra program step when a 2nd e^x or 2nd 10^x would require just a single program step.

Okay. INV is just a single extra program rather than STO 0 3 needing all three program steps on an SR-52.