Computer diagnostic board that provides system monitoring and permits remote terminal access
First Claim
1. A system management module for a host computer system which includes a host processor coupled to a host bus, said system management module comprising:
- a system management processor coupled to a system management local bus;
a system management interface unit connected to said system management local bus and to said host bus, said system management interface unit comprising an arbiter for said host bus, and said system management interface unit capable of running master cycles on said host bus;
a communications device coupled to said system management local bus for communicating with a computing system at a remote location; and
a video controller connected to said system management local bus for generating video signals for display at the remote computing system.
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Accused Products
Abstract
A system management module (SMM) for a host server system includes a system management processor (SMP) connected to a system management local bus. The system management local bus connects to the system PCI bus through a system management central (SMC). The SMC includes the main arbitration unit for the PCI bus and also includes the arbiter for the system management local bus. The SMM includes a video controller and/or keyboard and mouse controller connected to the system management local bus to support remote consoling of the SMM. The video controller is further used for transmitting screen images to a remote computer system to facilitate system failure analysis. A plurality of system management remote units are provided for coupling to various components and busses within the host computer system. The system management remote units (SMR'"'"'s) connect to the SMM via serial bus and permit the SMM to automatically monitor activities and operating conditions, including determining the source of interrupts on busses and detecting error conditions.
181 Citations
28 Claims
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1. A system management module for a host computer system which includes a host processor coupled to a host bus, said system management module comprising:
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a system management processor coupled to a system management local bus; a system management interface unit connected to said system management local bus and to said host bus, said system management interface unit comprising an arbiter for said host bus, and said system management interface unit capable of running master cycles on said host bus; a communications device coupled to said system management local bus for communicating with a computing system at a remote location; and a video controller connected to said system management local bus for generating video signals for display at the remote computing system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system management module for a computer system comprising:
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a system management processor connected to a system management local bus; a system management control unit connected to said system management local bus and adapted to connect to a host bus within said computer system, wherein said system management control unit includes an arbiter for said host bus; a communications device coupled to said system management local bus for communicating with a computing system at a remote location; a system management remote unit adapted to connect to an expansion bus within said computer system and which couples to said system management module via a serial bus, said system management remote unit capable of monitoring conditions of said expansion bus and reporting said conditions to said system management module via said serial bus; a video controller connected to said system management local bus for generating video signals for display at the remote computing system; and a keyboard controller connected to said system management local bus, said keyboard controller receiving signals from a remote computing system and in response generating encoded signals that are transmitted to the system management processor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A system management module for a computer system, comprising:
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a system management processor connected to a system management local bus, a system management control unit connected to said system management local bus and adapted to connect to a host bus in the computer system; a communications device coupled to said system management local bus for communicating with a computing system at a remote location; a video controller connected to said system management local bus for generating video signals for display at the remote computing system; a keyboard controller connected to said system management local bus, said keyboard controller adapted to receive signals from a remote computing system and in response generate encoded signals that can be transmitted to the system management processor; a plurality of system management remote units dispersed throughout said computer system, said system management remote units connecting to said system management module by a serial bus; and wherein the system management control unit also connects to the system management remote units through a JTAG bus to permit the system management control unit to determine a source for signals appearing on the serial bus.
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19. A network server, comprising:
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a host processor connected to a host bus; a bus bridge connecting said host bus to an expansion host bus; a system management module connected to said expansion host bus, said system management module including; a system management processor connected to a system management local bus; a system management control unit connected to said system management local bus and to the expansion host bus, wherein said system management control unit comprises an arbiter for said expansion host bus; a communications device coupled to said system management local bus for communicating with a computing system at a remote location; a system management remote unit connected to said system management module by a serial bus; a video controller connected to said system management local bus for generating video signals for display at the remote computing system; and a keyboard controller connected to said system management local bus, said keyboard controller receiving signals from a remote computing signals and in response generating encoded signals that are transmitted to the system management processor. - View Dependent Claims (20, 21, 22, 23)
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24. A system management module for a network server system that includes a host processor, comprising:
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a system management interface unit adapted to connect to a host bus within said network server system, said system management interface unit comprising an arbiter for said host bus; a memory controlled by said system management interface unit; a system management processor coupled to said system management interface unit by a system management local bus; a video controller connected to said system management local bus; a keyboard and mouse controller connected to said local bus; wherein said system management interface unit is capable of isolating the system management module from the network server system in the event of a failure in the network server system. - View Dependent Claims (25, 26, 27, 28)
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Specification