1.3 What is an R10000 Microprocessor?

External Interfaces

• a 64-bit System interface allows direct-connection for 2-way to
  4-way multiprocessor systems. 8-bit ECC Error Check and Correction is made on address and data transfers.
• a secondary cache interface with 128-bit data path and tag fields. 9-bit ECC Error Check and Correction is made on data quadwords, 7-bit ECC is made on tag words. It allows connection to an external secondary cache that can range from 512 Kbytes to 16 Mbytes, using external static RAMs. The secondary cache can be organized into either 16- or 32-word blocks, and is 2-way set associative.