PETA777 RTP SLOT This allowed enterprising third-party manufacturers to build PowerPC G3 upgrades for this slot. Mid-range Power Macintosh systems based on PowerPC 603e processors with PCI architecture, such as the 5400, 5500, and 6360 through 6500, featured an L2 cache slot which provided direct access to the CPU. First generation Power Macintosh systems with NuBus architecture, such as the 6100, 7100, and 8100, included a PDS that was used for high-speed AV cards. This configuration proved to be so popular for Apple's Performa line that later 68040 such as the Macintosh LC 475 and PowerPC-based versions were essentially emulating the 68030 pin signals for the LC slots that they inherited. The SE "System Expansion" slot, introduced in the Macintosh SE in 1987, was the first processor direct slot, using a 96-pin Euro-DIN connector to interface with the Motorola 68000 processor. The PowerBook Duo line was introduced in 1992 with a unique 68030-based connector that could allow the subnotebook logic board to communicate with an array of desktop docking systems, some of which could be upgraded with floating-point units.|How To Make Your Slot Rush Look Like A Million Bucks