Uah! It is a weird but good reason. But is more weird that does not happen with the x coordinates, 0 is 0, nothing to add. Maybe the reason is the Y is passed before. Anyway, the related calls to exos in the z88dk had something not trusty, sometimes don't work as expected. I can rewrite everything I need bypassing them.
This calls to exos using escape sequences seem to be very slow.
