The AIP chassis and backplane has an empty high speed serial slot Additional RA-RCC Memory Cards (96 GByte Flash Cards or 10 GByte DDRII SDRAM) Unique I/O Card (Analog, High Speed Serial, RF front end)
There are three clocks on the main RCC: PCI 33MHz, 125MHz, and 200MHz. For IRIS, they took a 93MHz clock off the back plane and fed it to the COPs (I believe) through the mezzanine.
“ Responsive Space refers to the ability to rapidly achieve a specific objective through the use of space with rapidly being the operative word. The AFRL Office of Force Transformation suggested that the goal for fielding a new payload is weeks and months and not decades.” 
Tactical Satellite (TacSat) program building competency to achieve the Responsive Space challenge 
Joint AFRL and NRL demonstration program
Goal to develop capability to field inexpensive space systems in time of crisis to augment and reconstitute existing capabilities or perform entirely new tactical theater support missions
Key success criteria include
Develop low cost ($20 million or less) mission-specific spacecraft
Rapid deployment with on orbit activation within six days of call up
Provide between six to twelve months of reliable mission operations
 Lanza, et. al., “Responsive Space Through Adaptive Avionics, Responsive Space Conference, Los Angeles, CA, April 19-22, 2004.  J. Raymond, et. al., “A TacSat Update and the ORS/JWS Standard Bus,” Responsive Space Conference, Los Angeles, CA, April 25-28, 2006.
IP Router Redundant Core IP Router PSIM Primary Core Ku1in Ku1out Ku2in Ku2out Cin Cout 1 1 PSIM Ku1in Ku1out Ku2in Ku2out Cin Cout SGE SGE SGE SGE 2 2 1 1 2 2 Pri 100VDC Pri Cmd&TlmA Red Cmd&TlmA Red 100VDC Red Cmd&TlmB Pri Cmd&TlmB test test test test