ATLANTIS - a modular, hybrid FPGA/CPU processor for the ATLAS

ATLANTIS realizes a hybrid architecture comprising an industry standard PC platform plus different FPGA based modules for high-performance I/O (AIB) and computing (ACB). It is a flexible and modular system which can be the platform for several applications. CompactPCI provides the basic communicationmechanism, enhanced byaprivate bus. The system can be tailored to a wide range of applications by selecting an appropriate combination of modules. Acceleration of computing intensiveAtlas level-2-trigger tasks has been demonstrated with an ACB based system. The Atlas RoD and RoB systems will profit from the flexible and highly efficientAIBI/Oarchitecture. Various highspeed interface modules (e.g., S-Link / M-Link) are supported, allowing up to 28 links per CompactPCI crate