Abstract: Techniques and apparatus are disclosed for detecting and responding to the malfunction of a host coupled to a communications bus through a bus transceiver.

Abstract: A computer system has at least one processor, a memory system, a Joint Test Action Group (JTAG) bus interface, and Input/Ouput devices. At least one Input/Ouput device of the system has an integrated circuit connected to and readable by the JTAG bus interface. The memory system of the computer system contains an exception handler capable of reading a state of the readable integrated circuit of the Input/Output device upon occurrence of an exception.

Abstract: Systems, methods and software products ensure correct connectivity between circuit designs. A list of connections of the circuit designs is generated. One or more mapping files are generated from the list to correlate connections between the circuit designs. The mapping file is regenerated in response to modification of at least one of the circuit designs.

Abstract: A field unit has a connector with first and second interconnect apparatus coupled to connector. The field replaceable unit has test apparatus coupled to the first and second interconnect apparatus capable of testing connections through the connector to the first interconnect apparatus under control of signals on the second interconnect apparatus. The field replaceable unit is capable of being hot-plugged. In an embodiment, the second interconnect apparatus is of the JTAG type. Also claimed is a method of testing interconnect between the field replaceable unit and another unit of a system into which it has been hot-plugged.

Abstract: A computer system has at least one processor, a memory system, a Joint Test Action Group (JTAG) bus interface, and Input/Ouput devices. At least one Input/Ouput device of the system has an integrated circuit connected to and readable by the JTAG bus interface. The memory system of the computer system contains an exception handler capable of reading a state of the readable integrated circuit of the Input/Output device upon occurrence of an exception.

Abstract: Techniques and apparatus are disclosed for detecting and responding to the malfunction of a host coupled to a communications bus through a bus transceiver.

Abstract: A bus bridge is capable of transferring information between a first serial bus and a target serial bus. The bridge is capable of operating as a bus slave on the first serial bus, and as a bus master on the target serial bus. The first serial bus in a particular embodiment is an IIC serial bus, while the target serial bus is a JTAG bus. There may be additional target serial busses, and there is a selection apparatus whereby commands may be directed to a particular target serial bus.

Abstract: A field replaceable unit has a connector with first and second interconnect apparatus coupled to connector. The field replaceable unit has test apparatus coupled to the first and second interconnect apparatus capable of testing connections through the connector to the first interconnect apparatus under control of signals on the second interconnect apparatus. The field replaceable unit is capable of being hot-plugged. In an embodiment, the second interconnect apparatus is of the JTAG type. Also claimed is a method of testing interconnect between the field replaceable unit and another unit of a system into which it has been hot-plugged.

Abstract: Systems, methods and software products ensure correct connectivity between circuit designs. A list of connections of the circuit designs is generated. One or more mapping files are generated from the list to correlate connections between the circuit designs. The mapping file is regenerated in response to modification of at least one of the circuit designs.