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    • 6. 发明专利
    • MEMORY BREAKDOWN CHECKING METHOD
    • JPH0311440A
    • 1991-01-18
    • JP14534789
    • 1989-06-09
    • HITACHI LTDHITACHI TECHNO ENG
    • SANJIYOU KAZUHIROYAMAGUCHI FUMIO
    • G06F12/16
    • PURPOSE:To check whether a memory is broken or not by storing the check information of a program into an IC memory card, and providing carrying terminal with the checking means for the check information on a carrying terminal, and investigating coincidence between both the check information. CONSTITUTION:When the IC memory card 10 is inserted into the carrying terminal 30, terminals 22 and 42 are connected, and a sensor 40 detects the check signal of a power source part 20, and a control part 32 confirms insertion, and executes parity check by calculating the exclusive logical sum of every one byte of the program 14 of the card 10. A check value is compared with the parity check information 16 of the card. When it results is in coincidence, it is considered normal, and the contents of the program 14 of the card 10 is read out, and is written in the program 48 of the terminal 30, and the written program is executed. At the time of the breakdown of the program of the card 10, this purport is displayed on an output part, and the read-in and the execution of the program are prevented. Accordingly, a device never runs away on account of the execution of the broken program.