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Welcome to Cemetech! Since 1999, Cemetech (pronounced KE'me'tek) has been developing software and hardware in many technology-related fields. Among Cemetech's specialties are TI graphing calculators such as the TI-83+/SE and TI-84+/SE, the Casio Prizm graphing calculator, web programming, and DIY hardware projects and modifications.

Our members, enthusiasts, experts, and teachers are led by Kerm Martian, né Christopher Mitchell. Since 2004 he held the title of the world's most prolific graphing calculator programmer, with over 400 completed programs and more than 1.2 million direct downloads. He has also developed many software and hardware projects. Our staff of friendly volunteers hang out on our forum and IRC and SAX chatrooms, and are happy to answer questions.

Numbers: 665 articles have been posted in Cemetech's News Archives. View current site statistics. Within the last seven days, 3 files have been added to the file archives. Click to show the new files.

Latest Forum Posts
Scogger Ti by geekboy1011
Bug Reports by KermMartian
Spam Posts by APotato
Mess based TI8x Emulator by TheStorm

Cemetech Labs Updates
WiFi globalCALCnet with the Spark Core on 10/5/2014
Developing WiFi Calculator Communication with the Spark Core on 9/27/2014
PartyMode 2.0: The One-Room Instant Disco on 6/22/2014
Cemetech At World Maker Faire 2014 Plans on 5/28/2014

Highlights
SourceCoder 3 TI-BASIC Editor/IDE  jsTIfied online TI-83+/TI-84+ emulator  Cemetech Forum  Cemetech Projects  TI-83+/84+ Programs and Games  Casio Prizm Programs and Games  Using the TI-83 Plus/TI-84 Plus  Programming the TI-83 Plus/84 Plus  Doors CS 7  United-TI Fora  WikiPrizm 
STEM Behind Hollywood: Earth Impact! for TI-84 Plus C SE
Published by KermMartian on October 10, 2014 at 1:58:01 PM CST | Discuss this article (1)

Cemetech has posted a number of articles on TI's STEM Behind Hollywood initiative, starting with the first announcement of the project, and continuing with the overwhelmingly positive reception at T^3 and the first two-part activity, Zombie Apocalypse. For Cemetech Programming Contest #12, Lorenzo "Ordelore" Orders planned to port the Earth Impact! activity, as detailed in his contest topic. Unfortunately, after learning about the gravitational force equation that governs cosmological movement, he was forced to drop out of the contest. I was inspired by his code, and ended up starting from scratch to create a TI-84 Plus C Silver Edition version of Earth Impact!

In Earth Impact!, students learn about gravitational force while they work to keep an asteroid from striking the Earth. This port of the Earth Impact! activity brings the excitement and education of TI's STEM Behind Hollywood program to the TI-84 Plus C Silver Edition. Made for Doors CSE 8.1 or higher, it provides the same engrossing lessons about Newton's law of universal gravitation, density, force, and other STEM topic that the TI-Nspire activity provides. Besides the on-calculator activity itself, it includes thorough teacher notes and a student handout, both heavily adapted from TI's original material. We would love to hear your feedback in the attached topic if you use this activity in your own classroom, and we plan to soon port Zombie Apocalypse, Body of Evidence, and Science Friction! to the TI-84 Plus C Silver Edition. We tip our hats deeply to Texas Instruments and their hard work in creating the original material for this activity.

Download:
Earth Impact! STEM activity for the TI-84 Plus C Silver Edition



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New HP Prime Revision C and Wireless Module
Published by tifreak8x on October 7, 2014 at 1:31:11 PM CST | Discuss this article (1)

Back in May, bhtooefr posted on Cemetech about a boondoggle with the HP Prime: Revision A devices could not use the promised wireless module. User balrog popped into IRC this morning and dropped a bit of news on us; Europe now has a new revision of the Prime in Europe. This promised Revision C fixes problems that they were having with the wireless kits that they have, and it seems the wireless kit itself is now available for purchase.

Announced in June 2014 in a Google Groups post, this new revision remains difficult-to-find in the US. The wireless device itself is described on educalc.net. Available information stresses that the wireless device, which strongly resembles the bright yellow wireless module for the TI-Nspire, can only be used for base station-to-calculator communication. Calculator-to-calculator communicate remains possible only with a wired cable.



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WiFi globalCALCnet with the Spark Core
Published by KermMartian on October 5, 2014 at 12:00:08 PM CST | Discuss this article (26)

Two weeks ago, the folks from Spark gave us two Spark Core WiFi development boards. These unique boards are based around TI's CC3000 chip, and also include an STM32F103 microcontroller for running user code. One of the key selling points of the Spark Core is that it includes a library providing compatibility with the Arduino Wiring "language". It was the work of two weeks to port my Arduino globalCALCnet bridge (first announced here in 2011) to the Spark Core, then integrate the functionality of the gCn Bridge code.

Previously, connecting a local-area CALCnet2.2 network to the wide-area globalCALCnet network required an internet-connected computer. A piece of software running on the computer, called the gCn Bridge, was responsible for encapsulating incoming packets ("frames") from calculators in TCP/IP packets and sending them across the internet, and unpacking incoming packets to deliver back to calculators. A previous Cemetech project attempted to use the ENC28J60 Ethernet module to directly connect CALCnet2.2 to globalCALCnet, but that project was put indefinitely on hold in 2013. This current project achieves all the goals of that project, and more: it provides a computer-free way to connect calculators to the internet, and lets the calculators independently configure the bridge device as well. The two components that were necessary to make this work are the Spark Core firmware itself, modified and expanded from the original Arduino gCn bridge firmware, and a Bridge Configurator program written in TI-BASIC that is used to set the WiFi credentials and local and remote gCn hub names on the Spark Core.

You can view a video of the device in action below, as well as download the Spark Core firmware and the gCn Bridge Configurator program at the links provided. I look forward to seeing more exciting developments based on this project.

Downloads and Information
WiFi Bridge firmware for Spark Core
Bridge Configurator program
Video of WiFi gCn in action



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Projects of the Month: September 2014
Published by tifreak8x on September 30, 2014 at 8:52:46 PM CST | Discuss this article (7)

Hello again, Cemetechians! This past month we've had quite the list of projects being worked on, started, and finished! (Maybe not in that exact order...). As always, we encourage you to take a look at these projects that their authors put time and effort into, and let them know what you think about their progress.
  • Dragonsglid: This project by 123outerme is a BASIC RPG for the TI-84 Plus C Silver Edition utilizing the graph screen. It appears to be a continuation of the story started by Source Seekers, where an army has invaded the town of Uvutu, and your goal is to drive them out! Check out the animated screenshots in the thread, and keep up with the progress as it happens.
  • Maze: This is a maze program in both BASIC and Assembly for the 83+/84+ calculators that generates random mazes. The DFS algorithm used is particularly clever and well-suited to the memory constraints of a calculator. Check them out, they look really cool.
  • Minesweeper CSE: Zeldaking has upgraded his old Minecraft game with some pretty nifty graphics. Give it a check out and maybe post in his topic on what you think of his project.
  • Find the Invisible Cow: This is an... Interesting project. The original Flash game requires sound to see how close you are to finding the invisible bovine. Give it a check out and see if it's something you could waste some time on on your TI-84 Plus C Silver Edition calculator.
  • CBLM: CBLM by CVSoft has been seeing a great many updates regarding bug squashing and better sensor support. The list is long, you should give it a look up to see all the improvements that have been made on its trek to version 1.5! He also has posted some fascinating experiments with CBL2 and LabPro.
  • WAti: ElectronicsGeek has been working out some kinks with WAti, and has gotten some communication between Wolfram Alpha and the calculator. Some exciting times are ahead for this project!
  • Super Smash Bros: Hayleia has locked down certain aspects of the game and should be set up in a way now that no longer will be updated and break characters in the future. Topics have been started giving an explanation on how to generate and create characters in both asm and axe, but they don't appear to be ready at this time. This has been featured as a particularly promising project on Cemetech; keep an eye on it so you can start in on your character creation for this amazing project!
  • Workout Logger: Willwac has started in on this project to help people keep track on what kind of work outs and other various data on their calculator. Not much else has been posted since the topic start, but if you're interested in what kind of work outs you've been doing (I'm pretty sure moving a mouse and clicking buttons doesn't really count) then this project might be what you're looking for!
  • Robot War 2: I'm pretty sure that right now, you need your mind blown. Like, seriously, this will totally blow your frickin mind! The graphics are so simple, yet they aren't. The things this engine does is just.. I don't know, I can't find the words for it. As always, go cheer on this project, it's amazing and Dianzi tian (previously known as Digitan) deserves all the flowers and candy for this project.
  • TI-Thrash: As stated in the first few lines of the topic, this is a homescreen arcade fighter game. It currently only lets you fight the CPU player, but it allows for different combo attacks, so that's always an awesome thing!
  • Wrench Utilities: And even more utilities from 123outerme. This project lets you search for tokens by typing them in, and also does a search for various code routines in TI-BASIC.
  • JPEG/PNG image Viewer: gbl08ma has released version 1.0 of his image viewer for the Casio Prizm, which adds PNG support. The download links are available on the first post in his topic.
  • Age of Darkness CSE: tifreak has gotten his RPG ported over to the TI-84 Plus C Silver Edition, utilizing the homescreen the same way the Prizm edition of the same game works. The menus are now far more interactive than before, and most bugs have been squashed. He's hoping that if anyone finds any more bugs that they'll kindly let him know where and how so he can get them fixed.
  • TokenIDE: Merthsoft has been doing some work with Tokens, and has rewritten the tokenizer that TokenIDE uses. Give it a whirl and let him know what you think!
  • Audio Player Prizm: Just look at that ProgrammerNerd guy, going around, bringing old topics back to life with cool new things, like better algorithms to bring better quality of life -- I mean sound.
  • Blackjack: At this point, you can go ahead and applaud zeldaking for getting you your gambling needs on the CSE. This project looks fantastic so far, with some awesome looking graphics! It requires xLIBC, which is fine, because who honestly doesn't already have DoorsCSE on their TI-84 Plus C Silver Edition?
  • YahtCSE: zeldaking has continued on this hyper activity of his, and started in on this project with some really nice graphics, and his own font with xLIBC. If you are a fan of Yahtzee, then this will be the game for you!
  • Puzzle Frenzy: Mateo has begun work on a port of Puzzle Frenzy for the CSE, and has posted up a nice looking menu as a start, as he gets the hang of the CSE display. Go give some encouragement and let him know how much you want this game ported over.
  • WiFi-connected calculator with the Spark Core: That Kerm guy, doing his crazy shenanigans again. At Maker Faire 2014, Kerm received a Spark Core device, with which he has been working to get wireless communications for the TI-83 Plus/TI-84 Plus using the new device. You should bounce over to the topic and read up on all the juicy information he has posted!

Until next month, keep them keys tapping and get that code written, and make sure you post plenty of updates so we can see the amazing things you are working on!

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