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公开(公告)号：US3755784A
公开(公告)日：1973-08-28
申请号：US3755784D
申请日：1972-02-01
Applicant: IBM
CPC classification number: G11C19/00 , B41J5/30 , G11C15/04 , Y10S707/99933 , Y10S707/99953
Abstract: A system for locating a retrieving a particular line of text stored in a shift register memory. The system includes an input/output typewriter in electronic association with a dynamic shift register and two one-character registers. One of the onecharacter registers is a query register and the other a hold register. A line of text stored in memory along with other lines is located for printout and revision by entering a search mode and keying query characters representative of a revision point in the line. The revision point can be a misspelled word. A keyed query character representative of the first character making up the revision point is input into the query register. When matches among corresponding characters are found in memory they are replaced with match flags. These match flags define the next characters in memory which are to be compared with the next keyed query character. Spaces define the next characters in memory when the search mode is entered. After the second query character is keyed it is held in the query register and the first keyed character is transferred to the hold register. The match flags in memory are then sequentially replaced with the first keyed character from the hold register and the character following each of the replaced match flags is compared with the second keyed character held in the query register. When matches again occur, the matched characters are replaced with match flags. This operational sequence continues until terminated by the operator, whereupon an operation flag existing in memory is repositioned at the beginning of the first line containing at least one match flag and that line is printed out.
Abstract translation: 一种用于定位检索存储在移位寄存器存储器中的特定文本行的系统。 该系统包括与动态移位寄存器和两个单字符寄存器电子关联的输入/输出打字机。 其中一个单字符寄存器是查询寄存器，另一个是保持寄存器。 存储在存储器中的文本行与其他行一起位于打印输出和修订版本，方法是输入搜索模式和键入查询字符，代表行中的修订点。 修订点可能是拼写错误的单词。 表示构成修订点的第一个字符的键入查询字符被输入到查询寄存器中。 当在内存中找到相应字符之间的匹配时，它们将被匹配标志替代。 这些匹配标志定义要与下一个带键查询字符进行比较的内存中的下一个字符。 当输入搜索模式时，空格定义内存中的下一个字符。 在第二个查询字符被键入之后，它被保存在查询寄存器中，第一个键入的字符被传送到保持寄存器。 然后，存储器中的匹配标志被顺序地从保持寄存器替换为第一关键字符，并且将每个替换的匹配标志之后的字符与保存在查询寄存器中的第二个有关字符进行比较。 当匹配再次出现时，匹配的字符将替换为匹配标志。 该操作序列继续，直到操作者终止，于是存储在存储器中的操作标志在第一行的开始位置被重新定位，其中包含至少一个匹配标志，该行被打印出来。
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