Windows is not going to be practical with the 5" monochrome monitor, but my HDMI monitors have VGA inputs.

I shall look in my junk box for an old IDE CD ROM drive and an IDE hard drive. I have several of those.

Board manufacturer and type not visible on the PCB. I found the cryptic mark "BMBM-401" on the PCB underside copper. A web search led me to a vendor page, which expands the part number to SSC-5X86H VER C BMBM-401 94V-0 KBD.

94V is just a standard of PCB material.

A search for SSC-5X86H led to similar boards. Eventually I found this page:

https://theretroweb.com/motherboards/s/icp-rocky-518hv

It has the bios, drivers and a manual for it.

I'll be able to confirm more details when I power it up and read the sign-on screen.