NEC Cenju-3

The name Cenju-3 suggests that there have been predecessors, Cenju-1 and Cenju-2. This is indeed the case but these systems have only been used internally by NEC for research purposes and were never officially marketed. The Cenju-3 is based on the MIPS R4400 RISC processor. All processors have, apart from their on-chip primary cache, a secondary cache of 1 MB to mitigate the problems that arise in the high data usage of the CPU.