发明名称 COPY PROTECTION SYSTEM
摘要 PURPOSE:To omit the use of a special device and the control of each user by obtaining the value showing an adequate device from the information on the defective track, defective sector, etc. of a fixed disk device. CONSTITUTION:If no method is secured to obtain the defective information from an operating system, the reading tests are supplied to all tracks and sectors on a disk for production of the defective information. Then the relevant part is changed into a special format which always has an error in order to secure a fact that an error is surely produced also in the next reading mode. The produced defective information is buried into a program. In such a case, the information is loaded to a fixed disk with a program initial code 10. Then a defective map program 11 serving as the information on the disk 1 is read out and all tracks and sectors of the disk 1 are tested for production of the defective information. Then this defective information is buried into the program for re-editing of the program. This program is rewritten on the disk 1.
申请公布号 JPS6215646(A) 申请公布日期 1987.01.24
申请号 JP19850155641 申请日期 1985.07.15
申请人 RICOH CO LTD 发明人 IKEHIRA KIMIMASA
分类号 G06F12/14;G06F9/06;G06F21/22;G06F21/24 主分类号 G06F12/14
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