Floorboard ? Ha we were dreaming of floorboards.
My first single board computer had no borard, at all it was build in a matchbox, had 4 bytes of memory (2 RAM and 2 ROM) it was programmed with toggle switches and used fireflys in stead of LEd's.
(I'm lying my first was a Sinclair ZX81 :-))
Cool SBC Grumpy, i remember a nerd friend messing around with a board with a hex keypad doing things i could not even relate to.