Abstract: An apparatus for electrically coupling an electrical interface of a unit under test with a debugging component includes a bracket assembly having a socket configured to electrically couple with the electrical interface, a baseplate assembly configured to secure the unit under test on a plate, a crane assembly coupled to the bracket assembly, and a cable assembly. The crane assembly is configured to enable movement of the socket relative to the electrical interface in each of a horizontal direction, a vertical direction, and an angular direction; and secure the socket in place relative to the electrical interface while applying a force by the socket against the electrical interface. The cable assembly is associated in part with the bracket assembly and is configured to electrically couple with the socket at a first end and with the debugging component at a second end.

Abstract: An apparatus for electrically coupling an electrical interface of a unit under test with a debugging component includes a bracket assembly having a socket configured to electrically couple with the electrical interface, a baseplate assembly configured to secure the unit under test on a plate, a crane assembly coupled to the bracket assembly, and a cable assembly. The crane assembly is configured to enable movement of the socket relative to the electrical interface in each of a horizontal direction, a vertical direction, and an angular direction; and secure the socket in place relative to the electrical interface while applying a force by the socket against the electrical interface. The cable assembly is associated in part with the bracket assembly and is configured to electrically couple with the socket at a first end and with the debugging component at a second end.

Abstract: A system and method are provided for hard disk drive command queue ordering with locational uncertainty of commands. For each command in the hard disk drive command queue, an expected access time is calculated utilizing a probability distribution for a currently executing command and a probability distribution for a candidate command. A command in the hard disk drive command queue having a minimum calculated expected access time is identified. Then the identified command having a minimum calculated expected access time is executed. The probability distribution for a currently executing command represents an ending location distribution for the currently executing command. The probability distribution for a candidate command represents a starting location distribution for the candidate command.

Abstract: A system and method are provided for hard disk drive command queue ordering with locational uncertainty of commands. For each command in the hard disk drive command queue, an expected access time is calculated utilizing a probability distribution for a currently executing command and a probability distribution for a candidate command. A command in the hard disk drive command queue having a minimum calculated expected access time is identified. Then the identified command having a minimum calculated expected access time is executed. The probability distribution for a currently executing command represents an ending location distribution for the currently executing command. The probability distribution for a candidate command represents a starting location distribution for the candidate command.

Abstract: An electrical signal is communicated between a first device and a second device during a plurality of active clock periods, where the electrical signal is in one of multiple possible states during each of the active clock periods. Timing circuitry within one of the first and second devices detects a predetermined sequence of states in the electrical signal, and in response to detecting the predetermined sequence, adjusts the timing of a subsequent state of the electrical signal with respect to an associated active clock period. Adjustment of signal timing in this manner is useful in reducing signal error due to the line charging effect.

Abstract: A method and apparatus are provided for implementing automatic cache variable update. A cache variable update hardware maintains a plurality of variables indicative of a data segment in the cache. The plurality of variables include a segment state variable, a segment starting address variable, a segment length variable and a segment offset variable. The cache variable update hardware monitors the cache to identify a selection of a segment for a data transfer to and from the cache and to identify data transfers. The plurality of variables are initialized responsive to an identified cache search. The segment length variable is incremented responsive to a data block written to the cache. The segment state variable is modified responsive to a data transfer complete.

Abstract: If consecutive read or write requests imposed on a DASD are of the same type and bear a defined sequential logical address relationship (pure sequential, near sequential), then a circular buffered data path using a pair of a synchronously managed read/write ports respectively coupling either a cyclic, concentric, multitracked storage medium or a cyclic, spiral-tracked storage medium and a device interface can continue data streaming unabated. Otherwise, the path would ordinarily have to be disabled and reconnected using a control microprocessor in respect of any random sequence of requests.

Abstract: A buzzer structure, of the type comprising a housing having a coil unit therein and an armature mounted for vibratory movement adjacent the coil unit, includes in one embodiment an integral portion of the housing which is bent inwardly into engagement with the coil unit to fix the spacing between the coil unit and housing, thereby to determine the dimensions of the gap between the coil unit and armature. In a further embodiment, the coil unit is mounted directly to a deformable, integral part of the housing which is bent inwardly to fix the spacing between the coil unit and an adjacent diaphragm.

Abstract: Smoke detection apparatus including a pair of photoelectric cells which receive illumination selectively from a very low level light source. One of the cells is termed the "direct" cell because it is in the direct path or on the axis of a narrow conical beam of light emanating from the source, the other cell being termed the "reflected" cell because it receives a significant part of its light input upon reflection of light from smoke particles or the like as such particles are drawn into the path of the light beam. Under predetermined smoke conditions, i.e., when there is smoke obscuration of the light of 2% per foot (.01 optical density), an alarm signal is triggered. The very low level light source is a light-emitting diode which sensitively monitors the smoke obscuration; only a slight change in the illumination to the pair of photocells, connected in a sensing circuit, is required to produce the triggering signal.

Abstract: An electronic circuit including a transistor which is biased to conduction is provided to initiate actuation of an electromagnetic transducer. The transducer has first and second coils one of which actuates the sounder. A potential is induced in the other coil and this induced potential is used to cut off the transistor. The next cycle of operation is initiated when the induced potential falls below a predetermined value in response to the reduction of the magnetic flux which, in turn, was the result of the transistor having been cut off.