Upgrade of OS for Casio fx-9860 Slim

[Jonas Sandstedt]

Hello,

I am trying to upgrade a Casio fx-9860 Slim, and found the page
https://tiplanet.org/forum/viewtopic.php...2&start=50
where there are many upgrades, including an OS 2.04 SH3 upgrade that can be modified (patched) for the Slim. Being completely new to this, not knowing what a patch is etc., I put several questions in the TI forum (last page in the thread) and received some helpful answers. The last questions, that are important to me since I do not want to ruin the calculator by making any error, still stand unanswered, however. As mentioned in the TI thread, I have patched the 2.04 bin file with the slim patch and acquired the bin file "fx9860g(sh3)2.04_to_fx9860gslim.bin” that I guess is my OS upgrade image for the Slim calculator.
I have downloaded fxRemote.exe, original 2.0.3.26 version, and the FA-124 linking software.
As I understand the procedure in the first posts in the thread, the next step is D, and then follows E, using the fxRemote program and the patched file “fx9860g(sh3)2.04_to_fx9860gslim.bin”. Is that correct?
Furthermore, when do I connect the calculator to the PC, and do I need any special USB driver? Was that included in the FA-124 linking software?
I hope there is someone who has done this before and can provide advice.

Best regards Jonas