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    METHOD AND SYSTEM FOR ENABLING NONDISRUPTIVE LIVE INSERTION AND REMOVAL OF FEATURE CARDS IN A COMPUTER SYSTEM
    1.
    发明公开
    METHOD AND SYSTEM FOR ENABLING NONDISRUPTIVE LIVE INSERTION AND REMOVAL OF FEATURE CARDS IN A COMPUTER SYSTEM 失效
    方法和系统用于实现不间断的建立和扩充卡的去除通电的计算机系统

    公开(公告)号：EP0974085A4

    公开(公告)日：2000-12-20

    申请号：EP97920184

    申请日：1997-04-08

    Applicant: IBM ,  BASS BRIAN M ,  HUBBARD JAMES A ,  OMAN PRICE W ,  PITA FRANK J

    Inventor： BASS BRIAN M ,  HUBBARD JAMES A ,  OMAN PRICE W ,  PITA FRANK J

    IPC: G06F3/00 ,  G06F13/40 ,  G06F1/16

    CPC classification number: G06F13/4081

    Abstract: A method and system for controlling the state of the system bus (32) during live insertion and removal of pluggable cards (FC) (34-37) by driving bus signals to a predetermined state. Thus making the system bus immune to signal disturbances. During live insertion and removal, a live insertion bus controller (LIBC) (30) accesses the system bus through interface (38) with system bus controller (SBC) (33), after receiving an indication that the FC is in the process of being live inserted or removed. The LIBC (30) then drives a subset of the control signals to a state that is immune to signal disturbances. The LIBC (30) effects suspension of running timeout and watchdog operations being performed by the SBC (33). When live insertion or removal is completed control is returned to the SBC (33).

    METHOD OF AND SYSTEM FOR ENABLING TO INSTALL AND TO REMOVE EXTENSION CARDS IN AND FROM A COMPUTER SYSTEM WITHOUT SWITCHING OFF THE SAME
    3.
    发明专利
    METHOD OF AND SYSTEM FOR ENABLING TO INSTALL AND TO REMOVE EXTENSION CARDS IN AND FROM A COMPUTER SYSTEM WITHOUT SWITCHING OFF THE SAME 未知

    公开(公告)号：PL336071A1

    公开(公告)日：2000-06-05

    申请号：PL33607197

    申请日：1997-04-08

    Applicant: IBM

    Inventor： BASS BRIAN M ,  HUBBARD JAMES A ,  OMAN PRICE W ,  PITA FRANK J

    IPC: G06F3/00 ,  G06F13/40 ,  G06F13/38

    Abstract: Method and system for controlling the state of a system bus during live insertion and removal of a pluggable feature card (FC) by driving control signals, which are transferred over the system bus, to an active signal level, or by driving down level active control signals to a low signal level near ground level. By this mechanism, the system bus becomes immune to signal disturbances and thereby allows pluggable units to be live inserted and removed without causing adverse effects to the system such as a system reset or compromise of data integrity. During live insertion or removal, a Live Insertion Bus Controller (LIBC) acquires access to the system bus through its interface with a System Bus Controller (SBC), after it has been signalled by a live insertion mechanism associated with the FC that the FC is in the process of being live inserted or removed. After system bus access has been acquired by the LIBC and the LIBC has taken over the control of the system bus, it drives a subset of the system bus set of control signals to a state that is immune from insertion/removal signal disturbance. In parallel, the LIBC effects suspension of running timeout and watchdog operations currently being performed by the SBC. When the LIBC is informed that the insertion process has been completed, the SBC again acquires control of the system bus. The same procedural steps are performed in case of removal of an FC.

    Tree based search method
    5.
    发明专利
    Tree based search method 未知

    公开(公告)号：GB2371381A

    公开(公告)日：2002-07-24

    申请号：GB0108545

    申请日：2001-04-05

    Applicant: IBM

    Inventor： BASS BRIAN M ,  CALVIGNAC JEAN L ,  HEDDES MARCO C ,  MARAGKOS ANTONIOS ,  SIEGEL MICHAEL S ,  VERPLANKEN FABRICE J ,  PATEL PIYUSH ,  JEFFRIES CLARK D ,  RINALDI MARK A

    IPC: G06F17/30 ,  H04L12/701 ,  H04L12/741 ,  H04L12/743

    Abstract: A method of performing a search based upon a search criterion using a tree is proposed. In use an input is read as a search key and the most significant bits are used as an index to a search table representing a plurality of search nodes. Each non empty entry in the search table will contain a pointer to the next branch of the tree. The search table may use a hash function to generate an index key. A determination is then made if the pointer points to a leaf or branch of the tree. If the pointer is to a branch the procedure is repeated until a leaf object is identified and returned to the calling application. In no entry is found that matches the search a no match is returned. The search criterion may be a longest prefix match in which instance the method is executed to find the position of the distinguishing bit.

    METHOD, SYSTEM AND DEVICE OF CONTROLLING THE STATE OF A SYSTEM BUS
    6.
    发明专利
    METHOD, SYSTEM AND DEVICE OF CONTROLLING THE STATE OF A SYSTEM BUS 未知

    公开(公告)号：HU223425B1

    公开(公告)日：2004-06-28

    申请号：HU0002656

    申请日：1997-04-08

    Applicant: IBM

    Inventor： BASS BRIAN M ,  HUBBARD JAMES A ,  OMAN PRICE W ,  PITA FRANK J

    IPC: G06F3/00 ,  G06F13/40 ,  G06F13/36

    Abstract: Method and system for controlling the state of a system bus during live insertion and removal of a pluggable feature card (FC) by driving control signals, which are transferred over the system bus, to an active signal level, or by driving down level active control signals to a low signal level near ground level. By this mechanism, the system bus becomes immune to signal disturbances and thereby allows pluggable units to be live inserted and removed without causing adverse effects to the system such as a system reset or compromise of data integrity. During live insertion or removal, a Live Insertion Bus Controller (LIBC) acquires access to the system bus through its interface with a System Bus Controller (SBC), after it has been signalled by a live insertion mechanism associated with the FC that the FC is in the process of being live inserted or removed. After system bus access has been acquired by the LIBC and the LIBC has taken over the control of the system bus, it drives a subset of the system bus set of control signals to a state that is immune from insertion/removal signal disturbance. In parallel, the LIBC effects suspension of running timeout and watchdog operations currently being performed by the SBC. When the LIBC is informed that the insertion process has been completed, the SBC again acquires control of the system bus. The same procedural steps are performed in case of removal of an FC.

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