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公开(公告)号：US3579185A
公开(公告)日：1971-05-18
申请号：US3579185D
申请日：1968-09-20
Applicant: IBM
Inventor： SPRUTH WILHELM
CPC classification number: G06F11/10 , H04L1/0045 , H04L1/0063
Abstract: The accuracy of a data transfer operation, particularly one which involves loading a micro program into an alterable control storage device for use in a data processing system, is verified by deriving a check number from the transferred data and comparing the desired check number with a predetermined check number known to be correct. A variety of concepts may be used to obtain the derived check number such as successive logical Exclusive OR operations on transferred blocks of data or selected portions of the blocks.
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