I have a preliminary (extra light) port of KhiCAS for the ti84pce/ti84pcepy and French equivalent models ti83pce/ti83pcepy.
I would appreciate to get some feedback from private beta-testers before releasing it publicly. If you are interested, please contact me. Note that KhiCAS is a large app, it requires clearing all your archive flash area for install, after install about 700Ko will remain. First tests show that it is compatible with TI OS and other apps, except the Python app (a reset must be done before calling Python).

A public beta version is now available. More infos here
https://www-fourier.univ-grenoble-alpes.fr/~parisse/ti/khicas84.html

I tried it on my TI-84+CE Python (running TI-OS 5.8.1.0012, the latest OS). After the installer reset everything, I cleared my RAM as instructed, but afterwards nothing really happened. I had nothing downloaded but I only had like 200 kb of Archive memory (I would assume that's the CAS). There is no app other than Finance in the menu. Is it because it's a Python edition or the OS is too high, or did I just misread the instructions or something?

I can't check on a 84 because I only have a (French) 83. Probably the installer app should do more checks.
Could you give more info on the installation would help:
1/ Did you send the bundle or the AppIns files individually?
2/ Which OS do you have on the desktop? (I test myself under windows)
3/ How much archive do you have precisely, once AppIns* appvars are removed and assuming you have nothing in archive except the non-working CAS?

I have modified the installer app with an additional check that the first and last AppIns variables corresponds to an application. I hope it will now detect installation errors.

AppIns00 should begin like an app, that is have at offset 0x4e: 0x81 0x0F.
The last AppIns variable should be AppIns43.8xv in the current configuration and it should end with 3+1+256+3+2 bytes
// signature field (3 bytes 02 3e 01)
// 0 (1 byte app not cleared)
// signature 256 bytes (full of 0xFF since it is not signed)
// size (3 bytes)
// appvar checksum (2 bytes)
For example hexedit AppIns43.8xv:

Code:

Hello. I installed latest version on my ti84+ce python. It works perfectly. No problems.

Tip: I deleted python before installing khicas (version 30 oct).

Hope this helps.

What OS are you using?
Edit: I haven't tried the new version yet; It probably works.

I am using version 5.8.0.0022.

Could you please try latest khicas zip and tell us if it works for your os version?

Thank you.

I've just updated the app (and doc), should be very near from a stable release now.
The most visible changes are

• more RAM available for computations: about 100K free (+30K pre-allocated for CAS objects). Hit the var key to see the current amount of free contiguous RAM.
  
• the graphing application should be more intuitive. Try zoom key then enter (plot command), then sin key then x key then enter, this will display the graph of sin(x) on the whole screen (except statusarea), i.e. 320x222 pixels instead of TI OS 265x165 pixels (62% more pixels), and the plot is about 2x faster than TI

Okay, I tested the latest version as of the last post in this topic, and it works fine. Thanks for making this, I've been looking for a good CAS.

I confirm that today's version (Nov 6) works perfectly on the ti-84 plus ce-t python edition calculator. Thank you very much. Khicas is wonderful.

There are still a few bugs inside KhiCAS, but it gets much harder to find them nowadays.
I'm currently investigating an issue: if you input a big integer, it is converted to a float. I think this is related to the toolchain implementation of strtol/strtoll that does not handle overflow the same as the libc:
long strtol(const char *nptr, char **endptr, int base);
endptr should go forward and point to the non-digit character of the given base (seems to be required by ANSI standard), but in the toolchain the loop stops at overflow and endptr points to a valid digit.
I'm trying a workaround by checking errno==ERANGE.

Hi there, when I try to load the website I just get a white screen that just keeps loading.

My lab server is indeed currently down. I hope this will be fixed today.

Looks fixed. Very nice!

Doc and app have been updated. Should be the release candidate version now.
https://www-fourier.univ-grenoble-alpes.fr/~parisse/ti/khicas84.html
Some screenshots:

Is this version different in functionality?

I did a few speed optimizations for graphing. I'm trying to add some support to display stats in the spreadsheet, but that will be very simple because there is almost no flash left.

I confirm that today's version (Nov 13) works perfectly on a real ti-84 plus ce-t python edition calculator.

Thank you very much.

Note that after discussions with TI, starting from now, KhiCAS will not run on ti84 with OS >=5.8.2. Therefore if you want to run KhiCAS, beware not to upgrade your calculator from TI website when OS 5.8.2 is/will be available.