Oh my god ... My first computer, how many memories, 30 years ago it was only version 286, I don't know what I would give to get it back.

What machine?
286/10 EGA or 286/12,5 VGA

it was definitely the 286 / 12.5 VGA I had paired with a NEC multisink monitor

Got this babe yesterday with original keyboard (cherry switches) and Microsoft serial mouse.
Really good looking and clean. It was used in traffic light controlling until 2018 so almost 30 years. Still haven't tried to turn it on but maybe today.

Nice! Does the mouse connect to the port that says "Mouse"? Mine came without keyboard or mouse so I tried connecting a non-Schneider serial mouse to that port but it didn't work.

Got my System 40 up and running months ago with 512MB CF card. But now, the BIOS is corrupted and I don't remember the CHS settings for the card.

And I don't remember how to get in to BIOS when it's not stopping on some error.

Great.