A computer system is disclosed with a host bridge that arbitrates access to a system resource from a CPU via a host bus and from a set of bus agents via a peripheral bus. A separate set of priority classes are provided to the CPU and to the bus agents and programmable timers are included to tune system resource allocation between the host and processor busses.
RELATED APPLICATIONS
This Application is a continuation of U.S. patent application Ser. No. 08/924,209, filed on Sep. 5, 1997, now a U.S. Pat. No. 6,212,589, which is a continuation of U.S. patent application Ser. No. 08/379,157, filed Jan. 27, 1995, now abandoned.
An electrical circuit for a bus interface and/or a bus bridge is described. The electrical circuit comprises a global master being coupled with a first bus and at least one function block being coupled with the global master. An address and/or data is transmitted from the first bus to the function block. The function block comprises a application specific functionality for carrying out a function in connection with the received address and/or data.
A hub based computer system having a central hub that communicates with a plurality of satellite devices over respective link buses. Each link bus is substantially the same and adheres to a predefined link bus protocol. The satellite devices are also connected to industry standard buses/devices. The central hub also communicates with a processor and system memory over additional buses. Each link bus includes a status line that allows each device connected to the same link bus to request control of the bus. The link bus protocol establishes a window in which the status signal may convey arbitration request information in a time-multiplexed manner. The protocol further includes a method of determining whether control of the bus can be transferred to a different device. Each device takes part in the decision process and thus, the arbitration method of the invention is decentralized.
Embodiments are generally direct to a method and apparatus for generating a header in a communication network. In one embodiment, receiving at a node on a first communication link a protocol data unit (PDU), generating a header that is non-specific to a particular communication protocol associated with the PDU when received at the node, the header to facilitate encapsulation and transportation of the PDU through a second communication link to deliver the PDU to a memory-based service interface of another node on the second communication link.
