[rbanffy]

If it's really Unix-like, it should be possible to attach a VT-100 to the serial port ;-)

According to http://punix-os.blogspot.com.br/2012/03/floating-point-grays... they want to add support to PS/2 keyboards through an adapter.

This http://education.ti.com/educationportal/sites/US/productDeta... also seems like a good solution.