Part 1: Verification of requirements
0. Verify that your calculator is a TI-Nspire CAS Touchpad (black body and keyboard, with monochrome screen). If it is not, this tutorial is not for you, and your keyboard/touchpad problem will not be fixed by it. This tutorial does not enable you to use prototype touchpad keyboards on prototype or non-prototype calculators. I would recommend buying another keyboard.
1. Turn on the calculator. Press
![[doc] :nsdo:](./images/smilies/nspire/ns_do.png)
2. Verify that the displayed OS version is one of:
- 2.0.0.1188
- 2.0.1.60
- 2.1.0.631
- 3.0.1.1753
- 3.0.2.1791
- 3.1.0.392
- 3.2.0.1212
- 3.2.0.1219
- 3.2.3.1233
- 3.6.0.546
- 3.9.0.461
- 3.9.0.463
3. Press
![[tab] :nsta:](./images/smilies/nspire/ns_ta.png)
![[enter] :nsen:](./images/smilies/nspire/ns_en.png)
4. Press
![[esc] :nses:](./images/smilies/nspire/ns_es.png)
Part 2: Installing appropriate OS
1. Download and install OS 3.9.0.463 from here, if it's not already installed. 3.9.0.461 will not work, only 463.
2. Press
![[tab] :nsta:](./images/smilies/nspire/ns_ta.png)
![[enter] :nsen:](./images/smilies/nspire/ns_en.png)
Part 3: Installing Ndless
1. In the Nspire software, delete every folder and file on the calculator.
2. Download this zip file. Extract the contents of it into a folder.
3. Copy the following items from the extracted folder onto the calculator:
- ndless (entire folder)
- A 1 (entire folder)
4. Turn on the calculator so that the home screen is visible. Dismiss any messages about files being received by pressing
![[enter] :nsen:](./images/smilies/nspire/ns_en.png)
5. Press [T]
![[enter] :nsen:](./images/smilies/nspire/ns_en.png)
![[enter] :nsen:](./images/smilies/nspire/ns_en.png)
![[ctrl] :nsct:](./images/smilies/nspire/ns_ct.png)
Part 4: Installing permanent patch
1. In the Nspire software, delete the folder "A 1" on the calculator.
2. Copy the following item from the extracted folder onto the calculator:
- A 2 (entire folder)
3. Dismiss any messages about files being received by pressing
![[enter] :nsen:](./images/smilies/nspire/ns_en.png)
4. Press [T]
![[enter] :nsen:](./images/smilies/nspire/ns_en.png)
![[enter] :nsen:](./images/smilies/nspire/ns_en.png)
5. If a popup appears informing you of success, press
![[enter] :nsen:](./images/smilies/nspire/ns_en.png)
Your touchpad should now work!
You can delete the "ndless" and "A 2" folders now, they are unnecessary.
If you see a FATAL ERROR message (this will probably never happen):
- Plug your calculator into a USB charger so that it will never turn off.
- Immediately send me and critor a private message asking for help. Do not touch anything on your calculator, or attempt to undo the process, until you receive a response.