Many thanks to Higgy! With his PS/2 board and adapters, the FleaFPGA Ohm works like a champ.
I have installed the good HstWB on it and you can find below a few screenshots of it (start-up of the HsTWB, WB31, Hst Game launcher, Sysinfo). It handles two hard drives of 4 gigs each without any issue.
I was particularly impressed by the 8659 dhrystones value. Not too bad for a 50 euro card
Well done to the creator, Valentin!