Merci, Didier. Also here, the equation editor is tolerant. Just the solver doesn't like it with SSIZE8 clear. We'll look into it.

## 43S News

### Re: 43S News

DM42 SN: 00041 β

HP-35, HP-45, ..., HP-35S; WP 34S & WP 31S for obvious reasons; DM16L

**WP 43S running**on this deviceHP-35, HP-45, ..., HP-35S; WP 34S & WP 31S for obvious reasons; DM16L

- PierreMengisen
**Posts:**246**Joined:**Wed Nov 29, 2017 1:38 pm**Location:**Neuchâtel CH

### Re: 43S News

Excuse me, but I'm not arguing with a machine. I'm testing it! Isn't that what you want?

RefMan p.160 : Equations (in EQN) may be three parentheses deep with SSIZE8 clear, seven

parentheses deep with SSIZE8 set.

So this is not true. To be corrected

Pierre

[TI59 with PC100C; TI-84 Plus CE-T; HP41CV with HP IL loop & 2*82161A DCD & 82162 TP; HP15C; HP28S; DM41; DM41L; DM42; DM41X]

[TI59 with PC100C; TI-84 Plus CE-T; HP41CV with HP IL loop & 2*82161A DCD & 82162 TP; HP15C; HP28S; DM41; DM41L; DM42; DM41X]

### Re: 43S News

To my knowledge Plus42 doesn’t have any similar limitation, I tested successfully an 8 parentheses deep equation with a 4-level stack.PierreMengisen wrote: ↑Wed Nov 24, 2021 9:42 amRefMan p.160 : Equations (in EQN) may be three parentheses deep with SSIZE8 clear, seven parentheses deep with SSIZE8 set.

I think that’s because it has a NSTACK mode where the stack depth is limited only by the memory available and when it translates the equations to user code for execution it enables the NSTACK mode (to be confirmed by Thomas).

DM42: 00425 - DM41X: β00066

### Re: 43S News

I could not find any similar limits in the HP-27S either. No idea how HP solved this problem way back then. Does anyone know?

DM42 SN: 00041 β

HP-35, HP-45, ..., HP-35S; WP 34S & WP 31S for obvious reasons; DM16L

**WP 43S running**on this deviceHP-35, HP-45, ..., HP-35S; WP 34S & WP 31S for obvious reasons; DM16L

### Re: 43S News

Thanks to J-F Garnier. https://www.hpmuseum.org/forum/thread-1 ... #pid154671

The link to the HPJ is wrong: try this http://hparchive.com/Journals/HPJ-1987-08.pdf

The link to the HPJ is wrong: try this http://hparchive.com/Journals/HPJ-1987-08.pdf

Greetings,

ajcaton

*Massimo*ajcaton

**-+×÷***left is right and*Casted in gold**right is wrong**### Re: 43S News

The 27S as the 18C, which was the first HP calculator with a built in equation solver, has an underlying system RPL OS, so it has access to an unlimited stack.

DM42: 00425 - DM41X: β00066

### Re: 43S News

Aha. Grazie, merci, and thanks for your input.

DM42 SN: 00041 β

HP-35, HP-45, ..., HP-35S; WP 34S & WP 31S for obvious reasons; DM16L

**WP 43S running**on this deviceHP-35, HP-45, ..., HP-35S; WP 34S & WP 31S for obvious reasons; DM16L

### Re: 43S News

Merci. Seen.

**WP 43S running**on this device

HP-35, HP-45, ..., HP-35S; WP 34S & WP 31S for obvious reasons; DM16L

- PierreMengisen
**Posts:**246**Joined:**Wed Nov 29, 2017 1:38 pm**Location:**Neuchâtel CH

### Re: 43S News

Question :

I can't find a way to use the PI constant in the equation editor other than with "acos(-1)" in radients mode,

which is not very practical.

I can't find a way to use the PI constant in the equation editor other than with "acos(-1)" in radients mode,

which is not very practical.

Pierre

[TI59 with PC100C; TI-84 Plus CE-T; HP41CV with HP IL loop & 2*82161A DCD & 82162 TP; HP15C; HP28S; DM41; DM41L; DM42; DM41X]

[TI59 with PC100C; TI-84 Plus CE-T; HP41CV with HP IL loop & 2*82161A DCD & 82162 TP; HP15C; HP28S; DM41; DM41L; DM42; DM41X]