I am one of the Prizm hackers who had been expressing concerns on #cemetech. I've been in various contact with Casio marketing and engineering personnel over the past year or so, and they have made it clear that they're currently turning a blind eye to mature, responsible third-party hacking. Officially, they're supposed to both not support it and potentially disallow it, but that hinges on how we behave. A Prizm coder started discussing creating a fake reset Add-In over at Cemetech, and a large number of us Prizm hackers quickly expressed our opinions on why that would be bad for everyone in terms of getting Casio to look more closely at what we were doing with Add-Ins and think seriously about Add-In security. Bottom line:

We do not want to drive Casio into the same cat-and-mouse game the Nspire developers have to work around.

One of the great advantages of Prizm programming in my view is that our programs and add-ins work on Prizms without jailbreaking, without Ndlessing, without any sort of unlocking tools. If we want to maintain that, we have to code like ethical, mature, grown-up programmers. Undermining the whole reason that there's a different between the CG10 and the CG20, at least with a public tool release, would not be responsible. I can appreciate the ego value of successfully figuring out the format, and even telling people of your technical successes, but just as it wouldn't be ethical to release a tool to the general public that could exploit a glitch in computer systems to steal identities on the assumption that some would use it for good, it's not ethical to release this tool. There's a very good reason that SourceCoder doesn't do such image format conversions, and trust me, it's not technical reasons.

I'm not sure if anyone at Omnimaga is still doing Prizm hacking, but I figured I might as well cross-post this in case any Omnimaga Prizm coders haven't yet been glancing at Cemetech's recent Prizm work. At any rate, I'm proud to present the first public beta of Graph3DP, a 3d graphing application for the Casio Prizm. Enter one to six 3D equations Z=f(X,Y) in terms of X and Y, adjust the window as need, and spin and zoom the resulting graph! This public beta demonstrates most of the major features of the program, including entering multiple equations, graphing, adjusting settings, and even tracing graphs. Additional work is still to be done on many of the features:

:: Debugging and expanding the parser
:: Debugging input routines
:: Adding the zoom menu
:: Adding real-time zooming
:: Improving the rotation algorithms to support dynamic axes
:: Complete tracing features
:: More graph-coloring schemes.

Give it a download and try it today! In other news, Cemetech's developers have been hard at work expanding Cemetech's WikiPrizm reference resource for Prizm users and programmers alike, and have been ardently working to learn more about the Prizm's hardware. Ashbad and myself, aided by Fishbot, new Cemetech member brijohn, and others, have been working with things like overclocking and directly accessing the data lines in the Prizm's serial / I/O port. Brijohn, using his experience with Casio's electronic dictionaries and translators, correctly pegged the CPU core as an SH7724 chip from Renesas, whereas previous guesses had ranged from the SH7721 to the SH7730 even to the fx-9860G's SH7705 CPU. With this information, Ashbad has now succeeded in tweaking the CPU speed in software, and will be reporting further findings soon. I'm poring over possible port numbers to determine how to poke the MSIOF port; if I'm successful, bidirectional transfers on both the RxD and TxD lines might be possible, meaning that CALCnet and stereo audio might be coming soon.

Download
[Casio Prizm] Graph3DP v1.0 Beta 1

Hmm, so why didn't he just put it all in one place? Is it so that it can work around DCS?

Only 547 bytes in "L1" is actually for CALCnet.  The other 100-odd you only have to worry about if you're also using the Doors CS GUI API with CALCnet. Believe it or not, I actually use my brain when I design things.

Edit: Oh yes, and the L3 stuff for interrupts, of course, but that's nothing extraordinary.

Wait, it's 30 bucks...
AND 50% OFF???

Uhm...

I think most people will just want to go to omnimaga instead... 60 bucks is a lot of money for free knowledge...

50% off of $30 is $15, Captain Math. Yes, the calculator community, including TI-BASIC Developer, Cemetech, TIFreakware's tutorials, Omnimaga, and ticalc.org's tutorials are always great resources for reference and real-time help.  However, there's never been a thorough, A to Z BASIC tutorial that also introduces general programming and problem-solving skills for students, teachers and professionals alike written, and this work will be that guide.

I get a very small percentage of the sticker price, but if you think of it in terms of how much is actually profit after what they pay their editors and how much distribution and publishing cost, it's more of a decent percentage (but still nowhere near 100%). The 3D rendering is just my own work; I think it's a standard sturdy soft-cover tech textbook, although it's longer than most.

Yeah, i actually did not like those people pixx. They look er, not really good. And they give a bad impression of the book.
What price?

Click through! It's $23.99 for the MEAP + eBook, or $29.99 for MEAP + print book.

Nearly every math student has a programmable calculator in his or her backpack. The TI 83, TI-83+ Silver Edition, TI 84+, and TI-84+ Silver Edition are more than just powerful graphing calculators: they're a great platform for learning to program and for creating your own math and science programs, practical utilities, and even games. A few months ago, I was approached my Manning Publications to write a book about graphing calculator programming. I've completed six of thirteen chapters and two of the appendices, and I'm happy to announce that the first three of the projected thirteen chapters have been released through Manning's MEAP (Early Access) program. MEAP is sort of like Book v0.3 Beta: you can read chapters as I complete them and offer critiques and feedback, and then you get the full print book or eBook when it gets released in Fall 2012.  To quote the official copy:

Programming the TI 83+/84+ is an example-filled, hands-on tutorial that introduces students, teachers, and professional users to programming with the TI-83+ and TI-84+ graphing calculators. This fun and easy-to-read book immediately immerses you in your first programs, and guides you concept-by-concept, example-by-example. You'll learn to think like a programmer as you use the TI-BASIC language to design and write your own utilities, games, and math programs. You'll put each new concept into action immediately as you unlock the full potential of your calculator. Along the way, you'll discover tricks to customize, slim down, and speed up your programs, and to learn from the many free programs available on the web.

You would be doing me a great service to join in the MEAP, and I hope that if you don't choose to make the investment and join now, that you will consider buying the book when it's published in the fall! I'm sacrificing sleep and sanity to make this an authoritative book, both for TI-BASIC programmers and for anyone looking to learn to program, so I would be eternally grateful to everyone who participates in the MEAP and offers feedback.

Official webpage: Programming the TI-83+/84+ to buy and participate
Cemetech project page: Links and additional information

Edit: Until March 6th, get 50% off with code TI8384 at checkout!

Congratulations indeed. I had a lot of fun grading the entry.