boardlist

Board	4W SW SPI	4W HW SPI	3W SW SPI	3W HW SPI	SW I2C	HW I2C	6800	8080
Arduino Uno	ok	ok	ok	n.a.	ok	n.a.	ok	ok
Digispark	?	n.a.	?	n.a.	ok (U8x8 only)	n.a.	?	?

n.a.: Not available/not implemented

ok: Implemented and successfully tested

?: Implemented, not tested, may not work