SwissMicros Calculator Forum

This program is to solve the "how much would this cost now?" type questions. It is very basic, there are 4 buttons: YR1 : input the original year $1 : input the original value YR2 : input year you wish value to be found of (default 2024) $2 : press to obtain value for YR2 There is no error...

That's very nice, and seems like a very similar system to plus42. A great UI! Can you also call it from programs? I notice you live in Los Angeles, which is a weird coincidence because I found out today that I will be attending a conference in Pasadena there this year. I've never been before, quite ...

Implementation of double factorial. Bit of a weird function TBH, as negatives and zero are special-case. 00 { 44-Byte Prgm } 01▸LBL "!!" 02 1 03 STO 01 04 DROP 05 X<0? 06 GTO 03 07 X=0? 08 GTO 05 09▸LBL 01 10 STO× 01 11 2 12 - 13 X≤0? 14 GTO 04 15 GTO 01 16▸LBL 03 17 2 18 + 19 STO÷ 01 20 X...

Implemented in the HP-92, this equation allows free-format problem solving, letting the user change any variable at any time or solve for any value at any time. Fascinating. That article goes on to describe issues they had with accuracy using this equation, especially for calculating i. Makes me wo...

Looking at the HP-70 manual: Screenshot at 2024-01-29 18-53-22.png Seems to suggest it calculates on the second consecutive press - and also it doesn't seem to care about the order of the values. I had a play with HP-1973 and the HP-80 ROM that comes with that. It's a bit confusing and the signs are...

On the HP-42s, the 'mvar' menu allows a 'solver' style menu to be part of your program. It allows you to input data into variables represented by the soft keys below the display, but will proceed to executing code if you press one of these variable keys consecutively. I notice the UI is the same on ...

Wow, that's pretty cool. I've never tried using APL, but I appreciate the impact of it on my favourite language R. Love that functional style.

That's very cool. I didn't know about this constant before today.

For a bit of fun, I've been comparing some TVM problems across the 4 TVM calculators I have and recorded some videos of it. I don't know what started my interest in it. It might have been Liz Truss and finally having to use the HP-12c for its intended purpose. Or it might have been because I wanted ...

Ugh, no, ignore my previous post. I was talking about the programmable menu (CLMENU, KEYG, KEYX, MENU) while the topic at hand was of course VARMENU / VARMNU1. Ah it was a good tip, but I did figure you were talking about that menu! Well it turns out the last day of 2023 is the day I realise that t...