Red screen updating CX CAS to 4.5

[johnmark]

Same pins as the ones on the picture :


You only need 1 GND pin, just choose what's easier for you.

Beware, pins numbering is reversed on hackspire, compared to what you can read on your calculator PCB.

What's the preferred software or instructions to flash the boot to the calculator, as well as any other important notes when flashing when I connect the pins to the usb FT232RL?

[critor]

I'm using ExtraPutty. But there are many other softwares.
http://www.extraputty.com/

[johnmark]

I'm using ExtraPutty. But there are many other softwares.
http://www.extraputty.com/

The last OS I installed was 4.4, so should I send a 4.0.3 boot2 and then flash OS 4.0.3, or a 4.4 boot2 and then reinstall OS 4.4?
Aditionally, what TTL voltage level does it expect? 3.3 or 5V?

[critor]

Any TI-Nspire CX Boot2 version should work.

TTL is 3.3V.

[johnmark]

Any TI-Nspire CX Boot2 version should work.

TTL is 3.3V.

Right after I can install any OS version that's the same or above the flashed boot2 correct?
Also, when I finish the process, must I do anything to remove any reminiscent components of controlx/nloader (diags) or is it already removed?
Is there a way to reset the calculator to its exact factory state, so I can mod it again with the reccomended instructions, since I remember using nspartmagic and BtMg?

[johnmark]

I just managed to recover the calculator by flashing boot2 4.4.0.8 and flashing os 4.5.4.48, by way of soldering wires to TX, RX and GND and using the FT232 with extraputty.
Now, can I just proceed to install controlx + nboot for CAS, or must I first remove something relating to nLoader or any previous OS (like a full factory reset)?
Thanks for all the help so far