@nina_kali_nina Yes, I've uploaded both the 1B/V3 demo and Chokanji 4 to the Internet Archive:
https://archive.org/details/1bv3_demo
https://archive.org/details/brightv4000
Both of these include both installer and pre-installed images (PCem for 1B and QEMU for Chokanji)
I've never actually tried to run 1B/V3 on an actual 286. The PCem configuration is for a Pentium
@andreww Thank you, I will make sure to try it out soon!