I do not know much about them but was wonder if we should try and upgrade the board with a RasberryPI? At least this way we can understand that architecture and have a firmware available to the community. Thoughts?
It's definitely a possibility, although the cheapest, easiest upgrade may be an arduino or melzi board. A raspberry pi is over €30 and then you have to buy the stepper break out boards. I've seen Chinese arduino and stepper sets for less than €10.
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