Abstract: A method and incorporated automatic air blockage assembly door is provided. The assembly comprises an air blockage door secured to a frame, capable of moving from a first to a second position via a pivot block and a shaft. The movement of the door is enabled by securing the door via the pivot block to an arm mechanism. The mechanism includes a pivot member and an activation pin. The activation and deactivation of the pin causes the movement of the door.

Abstract: An actuation assembly and method is provided for mating electronic unto a computer rack comprising a main housing engageably securable to a slide assembly. The slide assembly is capable of being secured to a side of the computer rack and having sliding features such that the slide assembly and the main housing when engaged can be telescoped out or returned to a closed position. The main housing having a vertical wedge for securing said assembly to said rack more securely and a drive wedge for moving the vertical wedge such that it can telescope into and out of said rack with said slide mechanism via a lead screw.

Abstract: Provides asset position detecting apparatus and methods for determining the correspondence relation between an asset attached to an RFID tag and the position in which the asset is located in a predetermined space range. An example apparatus includes: a movable RFID reader movable in the space range, for detecting whether the asset exists in its read range, and reading the RFID tag attached to the asset within its read range, to obtain the specific identification of the detected asset; and position determining means for determining the position where the reader is located, wherein, when said RFID reader detects that said asset exists in its read range during its movement, the obtained identification of the asset and the current position of the RFID reader are associatively stored in a database, so as to obtain the information regarding the position of said asset.

Abstract: An improved method and a cassette assembly for protecting electronic components, comprising of a housing that encloses the electronic components disposed over an insulator. The housing also encases a scissor jack component that can move from a first to a second position to enable actuation and unmating of the cassette assembly, such as to a next level of packaging. The housing has an overhang design, having complementary upper openings and lower cable shroud areas for supporting cable connections and for providing heat dissipation relief and EMC containment. Alternate designs provide for other components such as a honey comb screen and an EMC gasket to further enable EMC containment. In addition, other components such as an actuation trap door, a retention feature and card support members or support struts can be added to the design to enable better actuation and provide for an improved structural rigidity.

Abstract: A method and system for performing floating point additive arithmetic operations of long operands in a narrow dataflow. The operands include first and second floating point numbers having first and second mantissas, respectively, the second operand greater than the first operand. The mantissas are both separated into a low portion and a high portion, the high portions are loaded into N-bit operand registers. The high portion of the first mantissa is aligned with respect to the high portion of the second mantissa, the high portions are then moved into 2N-bit registers. The low portion of the first mantissa is aligned in accordance with the alignment of the first mantissa high portion. The low portions of both mantissas are then concatenated into the registers, the first mantissa concatenated using a hold-function circuit. A 2N-bit-wide adder performs the additive arithmetic operation on the concatenated mantissas.

Abstract: Debugging microcode is facilitated by a hardware assist that takes over from the microcode the basic management of handling the data for a trace entry, thereby reducing the load on the microcode to a single micro-instruction per trace operation and thereby permitting more trace points to be included in the microcode shipped to the field.

Abstract: A method and incorporated heat sink that is cooled both thorough air flow and liquid circulation is provided. The heat sink is disposed close to electronic components and used for their cooling. It comprises a finned structure positioned such that air can easily pass though it; a heat source plate disposed thermally in direction of heat flow to one side of the finned structure such that the heat source plate is in thermal communication with the finned structure fin base and fin tips, and a second plate also disposed at an opposing end of the finned structure in thermal communication both with finned structure fin base and fin tips. The heat sink also includes fluid re-circulator disposed at least partially in the plates for circulating fluids though the plates and around said finned structure such that both fin tips and fin base is cooled.

Abstract: A system and method is provided for synchronizing time of day information between and among communication adapters. Time of day information, which is desired for proper message packet ordering and delivery, is recovered in a process in which a master adapter, connected to a master node, periodically broadcasts current time of day information to slave adapters which operate to determine whether or not drift correction is to be applied.

Abstract: A docking apparatus for printed circuit boards including a cassette housing defining a housing cavity for containing a printed circuit board (PCB) and a linkage mechanism associated with the cassette housing. The linkage mechanism includes a linkage arm pivotally connected to the cassette housing via a pivot and has a first arm pivotally connected to the PCB, a traveler having a threaded bore therethrough connected to a second arm extending from the first arm, a shaft threadedly engaged in the left handed threaded bore through the traveler at a first end defining the shaft, the first end configured to operably transfer axial translation of the shaft to the traveler, and an opposite second end defining the shaft threaded engaged in a right handed threaded bore through a split nut operably secured to the cassette housing.

Abstract: An impact of configuration changes on controllers is projected, in a computing environment including one or more bridge attached channels. This projection quantifies the impact for each controller affected by the change, such that it is known by a quantifiable value how much the change impacts the controller. In order to project the impact, a projected I/O velocity of the controller is determined. In making the projections, pseudo channels associated with a particular bridge attached channel are modelled as independent channels. Alternatively, a utilization metric of a bridge attached channel is determined and compared to a threshold; pseudo channels associated with the bridge attached channel are modelled as independent channels if the utilization metric is below the threshold.

Abstract: Adapters, which provide message communications capabilities in a multinode data processing network, are provided with a mechanism for indicating critical errors from which recovery may ultimately be possible. Error handling capabilities are incorporated which operate both globally and locally to insure, to the greatest extent possible, that applications running on the network are not prematurely terminated and that the node with the error affected adapter is not prematurely removed from its connectivity with the other nodes within it network group.

Abstract: A message-based approach is presented for propagating a digital certificate state change notification throughout a data processing network. The approach includes registering at least one interested party with a certificate authority for state change information relating to the digital certificate; and automatically sending a state change notification message from the certificate authority to the at least one interested party responsive to the certificate authority noting a state change in the digital certificate. The at least one interested party can be registered by the certificate authority in a subscription list with initial forwarding of the digital certificate to the certificate authority for confirmation as part of an initial authentication process. The automatically sending results in sending the state change notification to only the at least one interested party registered with the certificate authority to receive the state change information for the digital certificate at issue.

Abstract: A docking apparatus for printed circuit boards including a cassette housing defining a housing cavity for containing a printed circuit board (PCB) and a linkage mechanism associated with the cassette housing. The linkage mechanism includes a linkage arm pivotally connected to the cassette housing via a pivot and has a first arm pivotally connected to the PCB, a traveler having a threaded bore therethrough connected to a second arm extending from the first arm, a shaft threadedly engaged in the left handed threaded bore through the traveler at a first end defining the shaft, the first end configured to operably transfer axial translation of the shaft to the traveler, and an opposite second end defining the shaft threaded engaged in a right handed threaded bore through a split nut operably secured to the cassette housing.

Abstract: An enclosure having a top which is folded over at the sides forming vertical side walls, and a bottom wall having large cut out portions. A vertical divider is positioned in the middle of the enclosure for forming two side-by-side receptacles, each for receiving an electronic module in drawer-like fashion. A front portion of the enclosure is hinged by a continuous hinge such that the front portion swings from a closed position to an open position. A tab on the front of the vertical divider engages with a slot in the front wall of the swingable front portion when the front portion is in the closed position for adding rigidity to the enclosure when the front portion is closed. A locking slide arm is provided for locking the hinged front portion in either the open or closed positions.

Abstract: A cooling apparatus for electronic drawers utilizing a passive fluid cooling loop in conjunction with an air cooled drawer cover. The air cooled cover provides an increased surface area from which to transfer heat to cooling air flowing through the drawer. The increased cooling surface uses available space within the drawer, which may be other than immediately adjacent to a high power device within the drawer. The passive fluid cooling loop provides heat transfer from the high power device to the air cooled cover assembly, allowing placement of the air cooled cover assembly other than immediately adjacent to the high power device. The cooling apparatus is easily disengaged from the electronics drawer, providing access to devices within the drawer.

Abstract: An enclosure apparatus provides for combined air and liquid cooling of rack mounted stacked electronic components. A heat exchanger is mounted on the side of the stacked electronics and air flows side to side within the enclosure, impelled by air-moving devices mounted behind the electronics. Auxiliary air-moving devices may be mounted within the enclosure to increase the air flow. In an alternative embodiment, air-to-liquid heat exchangers are provided across the front and back of the enclosure, and a closed air flow loop is created by a converging supply plenum, electronics drawers through which air is directed by air-moving devices, diverging return plenum, and a connecting duct in the bottom. In a variant of this embodiment, connecting ducts are in both top and bottom, and supply and return ducts are doubly convergent and doubly divergent, respectively. Auxiliary blowers may be added to increase total system air flow.

Abstract: A method and respective hardware logic circuit for implementing partially programmable Finite State Machines in the hardware of digital systems which use finite state machines to implement the control logic of the hardware design. In order to provide a partly reprogrammable Finite State Machine (FSM), which can be reprogrammed in a limited way such that no costly new physical re-build of the chip including said FSM is required, a hardwired FSM includes circuit means that allow that each hardwired product term to be disabled, and further includes means that add programmable product terms which allow adding new behavior to the state machine. Scan-Only SRLs are preferably used to program the required behavior of those programmable product terms.

Abstract: A method, apparatus, and computer program device enabling a computer network switching device to inform an attached requesting device of switch ports affected by configuration changes during the period of time since the last query by the particular requesting device. The switch device is initialized with a change index and data vector, the latter indicative of an initial port configuration. The switch increments the index in response to subsequent port configuration change events, and stores in association with the incremented index a data vector indicating the ports changed during the corresponding event. The switch stores an array of associated index and vector values. The switch responds to a query from an attached requesting device by informing the requesting device of specific ports affected by one or more configuration changes since the index value held by the requesting device was the current index value in the switch.

Abstract: The present invention provides a method for managing transmissions to a remote node having a buffer memory for receiving the transmitted packets and means for acknowledging the receipt of the packets. The method provides for a sender to maintain a sense of the availability of buffer memory even when acknowledging messages are lost with minimal impact on performance.

Abstract: A facility is provided to allow for dynamic configuration of data routing between TCP/IP stacks of multiple partitions of a multi-partition processing system and a network adapter such as a local area network (LAN) gateway for the multi-partition processing system. The facility includes a command for automatically providing the network adapter with information that a particular partition of the processing system is to function as a router; and using the information at the network adapter to forward data received across the network to the partition when the data is to an unregistered HOME internet protocol (IP) address. The forwarding of data to the router partition occurs without any conventional IP processing.