12. System Interface

12.9 System Interface Commands and Data Identifiers

System interface commands specify the nature and attributes of any System interface request; this specification is made during the address cycle for the request. System interface data identifiers specify the attributes of data transmitted during a System interface data cycle.

The following sections describe the syntax, that is, the bitwise encoding of System interface commands and data identifiers.

Reserved bits and reserved fields in the command or data identifier should be set to 1 for System interface commands and data identifiers associated with external requests. For System interface commands and data identifiers associated with processor requests, reserved bits and reserved fields in the command and data identifier are undefined.

Copyright 1996, MIPS Technologies, Inc. -- 21 MAR 96

Generated with CERN WebMaker
statistics