A method and implementing system are provided in which a service processor is implemented in addition to system processors. The service processor is enabled to access system on-chip registers to acquire system data through the use of the system JTAG bus connections. In one embodiment, logic is provided...http://www.google.com.tw/patents/US6282600?utm_source=gb-gplus-share專利 US6282600 - Method and apparatus of resolving conflicting register access requests from a service processor and system processor