Computer accounting system
AssigneeIng. C. Olivetti & C., S.p.A.
InventorEttore Violino
Life of this patent
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Abstract
There is disclosed an accounting system comprising a computer, an insertion device for receiving and printing on a card and including means for writing information on and reading information from a magnetic track on the card. A control unit operates in conjunction with the computer to control feed of the card in the insertion device and the said writing and reading operations, and to detect the occurrence of errors in the reading or writing. A register is arranged to count the number of times that a reading or writing operation has been performed. When an error is detected the computer repeats the operation until either the operation is performed without an error being detected or the register indicates that the operation has been repeated a predetemined number of times.
Claims4
A computerized accounting system for reading and writing information comprising:
- a first memory for storing microinstructions arranged in a plurality of microprograms;
- a processor connected to said first memory for processing said plurality of microprograms;
- at least one peripheral unit connected to said processor for processing cards having a magnetic track, said peripheral unit including an insertion device for handling said cards and a control unit connected to said insertion device and said processor for enabling said peripheral unit to perform reading or writing operations in response to particular microprograms stored in said first memory and processed by said processor, said control unit including means for writing information on said magnetic track during said writing operation and means for reading information from said magnetic track during said reading or writing operations;
- a first register connected to said processor adapted to record the number of times that an operation of reading or writing on said magnetic track has been executed, wherein said processor comprises error detecting means responsive to said reading means for detecting reading or writing errors in said magnetic track during said reading or writing operations and repeating means responsive to the contents of said first register and said error detecting means for repeating the operation until either the operation is performed without an error being detected or said first register indicates that the operation has been repeated a predetermined number of times.
Dependencies are inferred from the claim text.