Missing STH Instruction

The spec is written around dynamic addressing (slaves with byte enables) since native addressing is depricated. In Qsys however a wide master accessing a narrow native slave will cause potentially multiple back to back accesses to occur. In SOPC Builder the upper bits were always lost so the fabrics behave a bit differently when it comes to native addressing. This is one of the many reasons why I recommend that anyone creating a new component with slave ports always include byte enables.