3.
    发明专利
    未知

    公开(公告)号:DE2645236A1

    公开(公告)日:1977-05-18

    申请号:DE2645236

    申请日:1976-10-07

    Applicant: IBM

    Abstract: This specification describes an apparatus for determining if more than one of n lines are up at a given time. The apparatus includes means for encoding the n lines into m lines where n = 2m. Two encoding signals are generated; one, X0X1 . . . Xm, complement of the other, Z0Z1 . . . Zm. These two signals are Ex OR'd in accordance with the formula (X0 Z0) . (X1 Z1) . . . (Xm Zm). If more than one line is up, the resultant of the Ex OR operation is one. Otherwise the resultant is zero.

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