Custom Computing Machines ``CCM''

The most commonly used FPGA systems are the Custom Computing Machines. These machines are built from and array or matrix of FPGA ICs that are connected directly to each others. These FPGAs are located on a single board ``usually computer based boards''. These boards have built in memory modules to store the FPGA configurations and the intermediate results. These machines are generally built for specific applications so the inter-connections between FPGAs are optimized to get the best performance while reducing some of the system flexibility [12]. Some of the well know CCMs are the Splash and DecPerle machines. Some commercial CCMs are available from many companies such as the Virtual Computing Company ``VCC''.