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    ARRANGEMENT FOR DETERMINING THE LENGTH OF ARBITRARY SHIFT REGISTERS
    6.
    发明专利
    ARRANGEMENT FOR DETERMINING THE LENGTH OF ARBITRARY SHIFT REGISTERS 未知

    公开(公告)号：CA1125913A

    公开(公告)日：1982-06-15

    申请号：CA333248

    申请日：1979-08-07

    Applicant: IBM

    Inventor： DRESCHER HEINZ ,  IMBUSCH HEINRICH ,  LAMPE HANS H

    IPC: G01R31/3185 ,  G06F11/22 ,  G11C19/00 ,  G11C29/00 ,  G11C19/28

    Abstract: An arrangement for determining the length Lx of arbitrary shift registers, which registers may be in the form of test objects, not exceeding a predetermined maximum length Lmax, wherein the arrangement is connected to an input of the test object for generating a test shift pattern of length Lmax + K, with K?2 which consists of a defined bit configuration. that is only binary ones, with a defined data transition at its end facing the test object and which is shifted through the test object, a storage of the length Lmax + K which is connected to an output of the test object and which, a the shift pattern is shifted, accommodates the information of the length Lx of the test object and the part Lmax + K - Lx of the test shift pattern and a display field, whose individual fields are permanently associated with one storage cell, each of the storages indicating the content of the cell, so that the data transition, and thus the end and the length Lx, of the test object can be determined.

    8.
    发明专利
    未知

    公开(公告)号：DE2337159A1

    公开(公告)日：1975-02-13

    申请号：DE2337159

    申请日：1973-07-21

    Applicant: IBM DEUTSCHLAND

    Inventor： DRESCHER HEINZ ,  RUDOLPH PETER ,  LAMPE HANS HERMANN ,  POHLE WERNER ,  DOEHLE LOTHAR

    IPC: G06F9/48 ,  G06F13/18 ,  G06F13/366 ,  G06F9/18

    Abstract: A priority control circuit for establishing connections between a data handling system element and a number of subsystems wherein request signals from subsystems are scanned and granted service in a sequence which is determined by their position in a priority ranking order. The scanner returns to the beginning of the order immediately after a request has been granted, the subsystem just serviced being bypassed in the next scan until all of the remaining request signals have been processed. Each time a request signal is encountered and service granted, the scanner returns to the beginning of the order, a new scan is begun and all prior requests serviced are bypassed. In the absence of any other requests or after all of the request signals have been serviced the bypassed subsystems are unlocked and a scan of all requests is begun.

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