SwissMicros Calculator Forum

Yes, GTO END / XEQ END exist purely to allow the user to get to programs without global labels. These operations cannot be programmed; the calculator just beeps if you try them in PRGM mode. The behavior of GTO END vs. XEQ END is easy to explain: GTO END just takes you to the END, as expected; XEQ E...

Let's say you have two programs in memory, like these: 01 LBL "FOO" 02 RCL 00 03 PI 04 + 05 5 06 Y^X 07 FP 08 STO 00 09 END 01 LBL 02 02 RCL 00 03 9821 04 * 05 0.211327 06 + 07 FP 08 STO 00 09 .END. When you are in the second program, you can reach the first using GTO "FOO" or XE...

The .END. (and also regular END instructions) are shown in the XEQ menu — also known as the program catalog — so that you can access programs that contain no global LBL. When you enter a global label, that is, any ALPHA label except labels A-J and a-e, you'll notice that the .END. is no longer shown.

After having watched the MythBusters "magnetic money clip" episode, I'm amazed that magnetic cards can lose their data at all! (I'm having trouble finding that episode now but Physics Girl has a video on the subject as well.) I have an HP-67 that I bought used (heavily, by the looks of it)...

Note that even though it works with 34 digits, Free42 will only display up to 12 digits, like the HP-42S. You can see the contents of the X register at full precision using SHOW, i.e. [Shift] [.]. SHOW will show the full precision for 2 seconds before reverting to the normal display, but you can see...

The FWIW program will do that. In case it's not included in the FAT filesystem, you can get it at https://thomasokken.com/free42/42progs/

As far as advanced error handling is concerned, I haven't really thought about it, but I suppose try/catch might be useful. Something like that does already exist but only for catching math errors in functions called by SOLVE.

Yep, that's on my list, too. Details still to be determined but the objective is to be able to create functions that behave exactly like built-in unary or binary operators including the ability to throw any error. The error thing takes care of conditionals since those are handled using special error...

Well, the logic to translate text to programs already exists for program import, so most of the work for adding an "add program line" function has already been done. I'll have to think about the details. I'm busy with other things at the moment but I'll revisit this topic when I have more ...

The short answer is no, there is no trick, programs can't create or modify programs in Free42. I'd suggest that RPL is the platform of choice if you want to create programs that create programs, but since I'm in the middle of writing some big enhancements anyway... what kind of code were you thinkin...