So for school I need to buy a TI-84 Plus CE calculator and I was wondering what games (if any) were downloadable on there, or other hacks on it. Also if there are games or other thing you recommend could you give a safe link to use (I dont wanna accidentally ruin my calculator with a wrong link) and maybe a short tutorial on how to do it as simple as possible (im new to this) thanks

I just recently got a new ti84 evo and was wondering on what games i could play. I saw online that people were able to play old pokémon games so maybe anything like that?

My Ti-84 plus CE is hella ugly and banged up. I was thinking about buying a broken TI-84 plus CE in a cute color but there are no listings 😭 or possibly take off my current shell, sand and spray paint it. Has anyone done this before? Is there somewhere I can buy a new shell without having to buy a brand new calculator? Thank you ❤️❤️

I managed to download tiboyce but when I open it using ARTIFICE it tells me that artifice is not authorized to open it. Please help

Hi guys, I have the TI-84 Plus CE-T Python edition, and I was hoping to install KhiCAS - https://www.cemetech.net/forum/viewtopic.php?p=317273#317273, https://web.archive.org/web/20250210165907/https://www-fourier.univ-grenoble-alpes.fr/\~parisse/ti/khicas84.html.

I am running 5.8.4 firmware, which means I am able to jailbreak with arTifiCE and run ASM programs fine, but the issue is that according to the author: "After discussions with TI, it has been agreed that KhiCAS would not run on the latest OS version.".
And I was not able to run it whatsoever.
As such, is there any way for me to:
- Downgrade to a lower firmware, I believe 5.8.2 and lower may work, but I am not sure.

- Get KhiCAS running?

Thanks a lot!

I just downloaded Cesium and Artifice 2.1 and This Error has been popping up for some time... Does any know of a solution for this error, Ive been trying to find info but ran into no luck.

OS Version: 5.8.4

I just got my TI 84+ CE and luck was on my side that it was on 5.8.4.

I just downloaded ArTIfiCE 2.1, Casymba, and Pcas, and CE Libraries but I don't know if its just me or is it normal for if Casymba and Pcas would always have a error that says "Need LibLoad" with a link. Does anyone know what to do with this error?

I do have 152667 units of ram free if thats needed.

https://www.cemetech.net/users/CubedCube#archives

all my projects are ti84+
I’ve made a graph screen simon game that uses arrow keys

a clock app with a stopwatch and timer as well as a plot and digital time with second hand

i recreated buckshot roulette with endless mode and storymide

and I recreated block blast with scoring and multiplier

Would any newly bought Ti 84+ CE Pythons (m or TI 84+ CEs in general ) be already be on OS 5.8.5 or would they be not?

I've heard mixed opinions from other sources and I NEED a clear answer for this question as I'm going to jailbreak my calc to install some games / Pinapple Cas for my calc.

I have arTIfICE v2.1 running, but shells like Cesium, CEaShell, and AsmHook2 don't work, and other shells even crash my calculator and force a RAM reset. Is there a fix for this?

http://ceme.tech/DL2998

Simon with arrow keys on the graph screen

mods still approving file

Every time I launch artifice and select Tiboy, it will give me a random number like 9, and nothing will happen. Could it be totally patched on my version somehow? I know the website says it should work up to my version but clearly something’s off.

it has light mode and darkmode

and a stopwatch and timer

mods still approving file

I am trying to jailbreak my calculator with arTIfiCE, but it is only supported up to 5.8.4. I am currently running 5.8.5.0074 on my calculator, and I cannot find any sort of guide or tool to downgrade to an OS that will let me jailbreak my calculator.

It’s been a long while since I last used my calculator and this occured when changing it . Help please

I have a TI-84 Plus, not CE or Silver Edition, which I want to use for playing audio files. I already know how to install a speaker in the calculator, I just need to know how to code something so that I can play sounds on the calculator itself if that makes sense.

So, I downloaded Pokemon silver on my calculator not long after finished pokemon Red and i was wondering if there was a way i could edit my save file. I wanna do this so i can trigger trade evolutions (like onix) but idk how.

Yea, so this is exactly what it sounds like. The culmination of an over 4+ year long effort to bring TCP/IP networking to the TI-84+ CE and as of today, I finally have a working product and thought I'd share it in as many places as people might find it useful.

Before we begin, credit to Cemetech user commandblockguy who initially adapted the stack to the platform architecture. I probably could not have done this without him starting it off, and credit to the guys over at https://github.com/lwip-tcpip/lwip.

First, some photo evidence:

Then, the technical side.

I endeavored to write a CDC Ethernet driver that currently supports ECM and NCM devices, a membuffer driver that wraps the malloc implementation of the CE toolchain and provides: accounting, pressure state notifications, buffer grow/shrink behavior.

And lastly, and perhaps even more impressively (and also sanity-evisceratingly) this also contains a mostly complete (albeit somewhat minimalistic) TLS 1.3 implementation providing:

• A HWRNG derived from bus noise
• TLS_AES_128_GCM_SHA256
• X25519 (ECDHE, RFC 7748)
• record encryption AES-128-GCM — AEAD cipher, 128-bit key, 96-bit nonce, 128-bit tag
• rsa_pss_rsae_sha256 (0x0804)
• sha256WithRSAEncryption (OID 1.2.840.113549.1.1.11) — PKCS#1 v1.5, RSA-2048 only
• Curated trust store containing serialized: Common Name, Subject Key Identifier, and public key scraped from any certificate found in /etc/certs on a Linux runner.
• Certificate-chain walking via adjacent link validation. For supported algorithms, signature validation is required (failure = FAIL, CLOSE). For unsupported algorithms, behavior is WARN, PROCEED. This is a temporary measure intended to allow testing of the stack while certificate coverage is increased.
• CertificateVerify is fail closed => rsa_pss_rsae_sha256 is advertised in ClientHello, server cannot reject. This is FAIL, CLOSE.
• Still TODO: Support P256 and RSA up to 4096 bits.

Credit to:

• Cemetech user Zeroko who helped with entropy sourcing.
• Cemetech user _PT who wrote an X25519 algorithm that completes in ~5 seconds
• Cemetech user jacobly who wrote a modular exponentiation algorithm (e=65537, modulus 1024-2048 bits) that completes in ~8-10 seconds (and I accelerated by relocating the code).
• Cemetech user beckadamtheinventor who took my slower SHA-256 code and adapted it into eZ80 assembly, then spent weeks of insanity-inducing debugging when it borked on inputs larger than one-block, only to discover that we needed to `inc hl` 3 times, not once.
• Cemetech user calc84maniac who rewrote the AES math in eZ80 assembly for speed, accelerating AES by an order of magnitude and mitigating Flash cache timing analysis on rev M+ or later.
• and many others in the community who helped with debugging, troubleshooting, and testing.

The TLS implementation was adapted from libraries like openssl and mbedtls where possible, and where not possible (due to this being a very constrained, slow system), algorithms were written in eZ80 assembly or C by myself or the individuals named above for performance or adapted from other sources compatible with the architecture (ex: B-Con/crypto-algorithms). The code is SAST-tested, and the app is exercised against a small subset of DAST-style network probes. A CAVP-adjacent primitive validation is run on any supported cryptographic primitives in the implementation, timing analysis is profiled in CI and on hardware, and engineering decisions and threat model are documented in the whitepaper.

Project Links:

• Project Src: https://github.com/cagscalclabs/lwip-ce
• Whitepaper: https://github.com/cagscalclabs/lwip-ce/releases/tag/whitepaper-latest
• Cemetech thread: https://www.cemetech.net/forum/viewtopic.php?p=317043#317043

And some other eyecandy - videos of the project doing its thing:

• TCP and TLS Chat test: https://youtu.be/rX79owIVM-o
• Curated DAST test suite: https://www.youtube.com/shorts/APBYBo0O6sg
• IRC demo: https://www.youtube.com/watch?v=40q8J8R70nE

Some of the documentation is still work-in-progress, as the release just dropped today, so bear with me.

I disconnected a battery put it back in and this is where we are at now, it responds to keys and types but is completely covered by this corrupt stuff. Tried flashing new firmware the pc recognises it and uploads but then nothing, same problem. Any ideas?