Device for providing a modulo-n check character

申请公布号：: US4352096(A)
申请号：: US19790081217
申请日期：: 1979.10.02
申请公布日期：: 1982.09.28
申请人：: NIXDORF COMPUTER AG
发明人：: UNGLAUBE, UWE;MIEHE, FRIEDRICH V.
分类号：: G06F11/10;G06C11/00;G06K5/00;G06M3/12;(IPC1-7):G08C9/06;G08B5/00
主分类号：: G06F11/10
摘要：: Apparatus is disclosed for providing a modulo-n check character as a function of a sequence of data characters. The check character may be used to permit a check of the data character sequence for its correctness, for example, after being transmitted to a data processing installation or after printing. In the preferred embodiments each data character of the sequence is generated by one of a plurality of data character carriers which are selectively set to generate a given character. An additional check carrier is provided to generate the check character. The check carrier is set by a predetermined amount each time one of the data carriers is set so that the ultimately generated check character is a function of the data character sequence.