International Business Machines Corporation

Share-Young Lee

Hsu Chang

Tien C Chen

Chin Tung

A bubble logic array with n data inputs for performing any Boolean (or switching) logic function. Each of the data inputs comprises binary information in the form of the presence or absence of discrete bubbles. The logic function is performed by the propagation, channeling, and interaction of the bubbles themselves. The particular logic function performed by the array may be fixed by permanent connections of selective control inputs to bubble generators. Alternatively, a universal logic array may be provided by using a further 2.sup.n bubble inputs as controls to separately personalize the array. In this manner, the logic function performed by the array may be varied with each set of controls to achieve dynamically alterable logic. When the data inputs each comprise an input bubble pattern the logic array in either the fixed form or the alterable form is capable of pipelining operations, producing one meaningful output at every bit cycle.

Pipelined universal bubble logic array

A text editing system which is completely comprised of magnetic bubble domain components (or charge-coupled devices) is described. The essential parts of the system are a passive storage comprising a plurality of shift registers which are a convertible structure, i.e., they can be randomly accessed or sequentially accessed depending upon the state of a plurality of conversion switches. This provides great flexibility in entry, retrieval, and restoring. An active storage comprising a plurality of shift registers is used for various text editing functions, such as insertion of data, deletion of data, etc. In the active storage, an editing shift register is provided which implements the various text editing functions using techniques such as freezing data bits and bypassing data bits in order to change the order of the data and to close gaps which may occur in the data. A write decoder is provided for selective entry of text into the passive storage and a read decoder is provided for selecting the contents of a specific shift register in the passive storage for data manipulation. The conversion switches are also used to control data flow paths or directions and to maintain the proper order of the data. Control circuits are provided to coordinate and control the functions of the various storages, the decoders, and the switches. The principles used for the overall system can be implemented with bubble domain devices or with charge coupled devices.

Text editing system

A text editing system is described which is comprised of single technology elements. That is, the system is comprised of dynamic shift registers which are entirely implemented with either magnetic bubble domain devices or charge coupled devices. These shift registers can be randomly accessed using write and read decoders to provide great flexibility in entry, retrieval, and restoring of data. An editing shift register is used for text editing functions, such as insertion of data, deletion of data, etc. This editing shift register performs the data manipulation functions by using techniques such as freezing of data bits and bypassing of data bits in order to change the order of the data and to close gaps which may occur in the data. The shift registers used for storage and the editing shift register are characterized in that all data manipulation functions and all accessing functions do not require a change in the sequence of the drive field used to move the data bits.

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