Hi!  I am working on a random problem that my teacher gave me, but I am slightly confused with one part of the question:

A function f is defined on the interval [-3,3] as shown below:



On the given axes, sketch the graph of f((1/2)x)

Now, I do the horizontal translation, and doing this, I am able to sketch the graph of f((1/2)x), but only on the range from [-1.5,1.5], as shown here:



How do I go about finding the value of f((1/2)x) from [-3,-1.5) and (1.5,3]?  Any help would be much appreciated!

I am in the process of coding a video player for the Nspire using almost the same method as described by thepenguin77 in his 84+ video player.  Unfortunately, I am having difficulty getting the .tns file to run.  I find that when I display one and only one frame of the video, everything works fine, but the instant I try to show more than one frame, whether it be 200 frames of 2 frames, the Nspire crashes.

For example, the code:

#include <os.h>

int main (void) {

char * buffer=malloc(SCREEN_BYTES_SIZE);
memcpy(buffer,0xFF,SCREEN_BYTES_SIZE);
char image1[SCREEN_BYTES_SIZE]={image data, too long to post here};
memcpy(buffer,image1,SCREEN_BYTES_SIZE);
memcpy(SCREEN_BASE_ADDRESS,buffer,SCREEN_BYTES_SIZE);
free(buffer);
return 0;

}

But, when I add a second image, like so:


#include <os.h>

int main (void) {

char * buffer=malloc(SCREEN_BYTES_SIZE);
memcpy(buffer,0xFF,SCREEN_BYTES_SIZE);
char image1[SCREEN_BYTES_SIZE]={image data, too long to post here};
memcpy(buffer,image1,SCREEN_BYTES_SIZE);
memcpy(SCREEN_BASE_ADDRESS,buffer,SCREEN_BYTES_SIZE);
char image2[SCREEN_BYTES_SIZE]={image data, too long to post here};
memcpy(buffer,image2,SCREEN_BYTES_SIZE);
memcpy(SCREEN_BASE_ADDRESS,buffer,SCREEN_BYTES_SIZE);
free(buffer);
return 0;

}

The Nspire crashes when I run the program.  Does anyone know what could be causing this?  Obviously, this program is still in very early stages, and the conversion process is difficult at this point, but, I can't make any more progress until I can at least see something play.  Is there something preventing me from calling memcpy( so many times?  The data files for each frame are HUGE, could having more than one be causing me to crash?   Any help would be much appreciated, I would love to finish this program, as I think it would add new dimensions to Nspire programming.

Also, for the curious, here is a screenshot of it successfully running one single frame:


(note, the dithering is done by my screenshot program, not the actual calculator)

Hello!

While updating the level passwords in Block Dude to be compatible with OS 2.1, I discovered that my current method of inputing a password isn't working.  As a solution to this, I would like to be able to use a dialog box with an input field where one could type in the password instead of having to rely on key combinations.  Is this possible to do, or is it only possible to make a dialog box with the single "OK" button?  Thank you in advance for any help!

Hello!

Over the past few days, I have been trying to find past AP exams released by the College Board.  Using this Google search, I have successful in finding all of the 2008 released AP exams.

Although only the 2008 exams will be helpful, I was wondering:  Is there any way I can acquire AP exams released before 2008.  I know there used to be a seller on eBay who sold a group of 73 past AP exams dating back to 1990, but that item ended.   For extra practice, especially in any possible things I might self-study, these exams would be very helpful.

Thank you for you help!

Since there are many Ndless help/support threads popping up on Omnimaga, it might be best to consolidate all of the major questions/answers into one thread, which are listed below:

1. Where can I get a copy of OS 1.1?

Sadly, we cannot distribute copies of the TI-Nspire Operating Systems.  OS 1.1 is out there on the internet.  Just look around, you will eventually find it.

2. When will Ndless be released for an operating system other than 1.1?

Right now, official Ndless releases are only compatible with OS 1.1.  There are beta versions of Ndless that work on OS 1.4 and OS 1.7, but these versions are intended for developers and are not completely stable.  If you want, you can download the latest source code for Ndless here. (guest/guest to log in).  Please note that you must build this version yourself, as it is intended for developers and is not stable.

3. Can I install OS 1.1 on my touchpad Nspire?

Technically, you can install OS 1.1 on any Nspire, but OS 1.1 is not compatible with the touchpad keypad.  Therefore, OS 1.1 will not work if you have the touchpad keypad in the Nspire.  You will get an infinite reboot if you use the touchpad with any OS lower than 2.0.  See the answer to question 4 if you have installed OS 1.1 but you do not have a touchpad.

4. I installed OS 1.1 on my calc, but now it is infinitely rebooting!!!?

If you are using the touchpad keypad, this is caused because OS 1.1 is not compatible with the touchpad keypad.  If you get an infinite reboot, you should delete the OS like so:

Hold down the following keys until a menu pops up:

Clickpad: Home, enter, p, on
Topuchpad: Doc, ee, enter, on

Then, select option 2 (Delete Operating System)

Finally, resend your desired OS to your Nspire.

5. I tried installing Ndless on OS 1.1 using Ndless 1.1.1, but it did not work!?

This can be caused by a number of factors.  Most commonly, this is caused because Ndless is not completely compatible with Computer Link Software version 1.4.  Try downgrading to version 1.3, which can be downloaded here.

6. I installed OS 1.1 and Ndless 1.1.1, but now when I turn my calculator on, the screen does not turn on!

This is not caused by Ndless, but by a hardware change by TI that affects all TI-Nsprires running OS 1.1 made after 2007.  There is no known fix to this problem, but a workaround would be to have a Ndless document to reset the calc every time you turn it on, making the screen turn back on.  You can download a reset document, by calc84mainiac, here

7. I tried installing Ndless 1.7 on my calc, but it froze and random pixels lit at the top!

With the latest version of Ndless 1.7 (SVN Update 315 or later), this is not too much of a problem anymore.  Update to this version if using a older version.  Most of the time, Ndless will now automatically reset your calculator if the instillation fails.

8. I want to write programs for the TI-Nspire.  Where can I get the information I need to get started?

First, follow the tutorial in the Ndless ReadMe file in order to set up an Ndless development.  After you have the development environment set up, visit Hackspire, where you will find many resources documenting almost everything known about the Nspire!



If you have any additional questions or problems with Ndless, feel free to post them below and we will try to answer them promptly and add them to this original post.  Different issues can come up at any time, so don't feel bad about posting if your question is not in this post!

Axe Parser has reached 1337 replies!  Also, look up at OmnomIRC, Netham45/Netbot45 is having trouble giving people ops!

Ever since I set up my new computer, I have been experiencing serious problems with keypresses in the programs I am compiling.  I have found that the programs themselves are running slower (I have had to lower my key delay by about half) and pressing a key for an extended period of time, say 5 seconds, causes the calculator to completly freeze...

Does anyone know what could be causing this.  I have tried compiling Block Dude, Trapped, the Ndless demo, Ncaster, and bwang's picture viewer and the problem persists in each case. 

Also, would someone be willing to compile Block Dude for the Nspire CAS for me? I had a compiling error in the version I uploaded to ticalc.org (I used the NON CAS header), and I need to upload a new version ASAP.  I have attached a .zip of a skeleton containing the block dude files.

I have been working on this project for a little while now (although I have made very little progress because of Block Dude/Trapped), but after I finish Trapped, this will be the next project I will be working "full time" on.  Right now, I have a small amount of the game engine working, and the drawing routine is working (except for the fact I have not drawn the sprites yet, so no screenshots yet ).  I am getting pretty good at 2-D games like this, as they all follow the same basic game engine as Block Dude, except more/different cases have to be added to the engine.

I still have lots to do, but I thought I would announce this project now just to let everyone know.  It is going to be a while before this is finished (probably not until around next summer, maybe longer ).  Hopefully, if I have some time and I don't feel like working on Trapped, I will start on a few of the sprites and post a screenshot here!   I have been making good progress on Trapped, so that might be done sooner than expected, giving me time to work on this!

Latest Screenshots: