Look at this very rare TI-Nspire CAS prototype - even DataMath.org doesn't have it.



You can easily mistake it for a commercial TI-Nspire CAS... be carefull when buying online!

Notice the small icon at boot time in the top left hand corner of he screen.




It has early versions of the 1.1 boot1/boot2/diagnostics:
Boot1: 1.1.8129 (instead of 1.1.8916)
Boot2: 1.1.8310 (instead of 1.1.8981)
Diagnostics: from 2007.03.31 (instead of 1.1.8769 from 2007.04.17 - version is not shown on early diagnostics and only readable in the dump)


It does reject all commercial CAS & basic OSes 1.1-2.1.
The OS is rejected at the end of the download (so, something to do with the validation).

It probably had a 1.1 OS prior to 1.1.9170.
Yes, "had"... being unable to update the OS, the previous owner thought it would work better after erasing the OS through the maintenance menu.


The calculator is now totally useless.

Do you have any idea on how i could dump those early versions of the boot1/boot2/diagnostics, and on how I could install a working OS?

Remember: no OS -> no Ndless...

I tried transferring the 2.53 and 2.55 MP patch but TI-Connect keeps telling me "Cannot transfer application to the connected TI device. A certificate is needed for a successful transfer.

Do I need to manually sign the OS for a successful transfer? Note, my 83+SE runs OS 1.19 and here is the serial: I-0501

Ok. This should not happen.
I'm checking...

The certificate is not a problem with the signature, but with the header of the file.

That's great!!!
After reading images, the Nspire is now playing videos!


If I've understood correctly, you are using a list of images.

The only problem currently, is that it won't be easy for most users to convert a video as it needs to be compiled.


Could you think of a specific separate file format that could be opened by your program?
Then no compilation would be needed.

For example:
- concatenated bitmaps in a single file
- bitmaps with a numeric suffix like 001, 002, 003...
- or if you have the courage and the time, supporting GIF files (many free online tools let you convert videos to animated GIF files)


What do you think of this?

Quote from: apcalc on January 31, 2011, 03:23:23 pm

This might be it! :
A screen buffer is equal to SCREEN_WIDTH*SCREEN_HEIGTH/2, so this would be 320*240/2, not 320*240
Try using the constant "SCREEN_BYTES_SIZE" for the third argument of memcpy!

The screen buffer's that size only if you're in 4bpp mode... I'm using 8bpp (so I don't have to bother with nibble->byte conversion), where the screen buffer is indeed 320*240 (hence using SCREEN_BYTES_SIZE gives you only half the screen in this mode).

The first mViewer beta was using 4bpp mode.
When I changed the source to use 16bpp mode, i experienced very frequent reboots on exit.

mViewer is now very stable.

How did I solve the problem?
- I'm allocating my own separate 16bpp screen buffer
- I'm changing the screen buffer base address (see HackSpire)
- I'm switching the mode from 4bpp to 16bpp

Of course, before exiting:
- I switch the mode from 16bpp to 4bpp
- I restore the original screen buffer address
- I'm freeing my now unused 16bpp screen buffer


Hope this can help you.


Now, some questions for you.

Do the wad file still have to be in the root document folder?
(with OSes 1.X, it's not easy storing things in that folder...)

With my basic Nspire ClickPad, and the wad file in the same folder as ndoom, I'm getting a reboot upon starting... no error message.
It happened both with Ndless 1.7 and Ndless 1.4.

TouchPad calculators with a 2.x OS can be downgraded to any 1.x OS using Nleash.

Yes. It only works on 2.0.1 and 2.1.0.

MathPrint is composed of 2 parts:
- the editor (when you're entering a natural expression)
- the viewer (to display the result in a natural way - only support fractions)

You've got exactly the same thing on the basic TI-Nspire.

If I run a TI 84+ OS on my 83+SE, would linking work?

With my basic TI-83+ running a TI-84+OS, linking is still working.