6U CompactPCI® Dual System Slot Specification
The Dual System Slot (DSS) Specification defines the interface requirements between a CompactPCI® System Board and backplane for two independent CompactPCI® buses to be driven from the System Board. In DSS systems, CompactPCI® buses are provided at J1/J2 and J4/J5. The bottom bus connected to J1/J2 is referred to as CompactPCI® Bus A; the top bus connected to J4/J5 is referred to as CompactPCI® Bus B. The relationship between CompactPCI® Bus A and CompactPCI® Bus B is not specified. This specification allows backplane designers and CPU manufacturers to refer to a common specification from which to build systems.