assert len(set(t.ram for t in harts)) == 1, \
"All spike harts must have the same RAM layout"
assert len(set(t.ram_size for t in harts)) == 1, \
assert len(set(t.ram for t in harts)) == 1, \
"All spike harts must have the same RAM layout"
assert len(set(t.ram_size for t in harts)) == 1, \