Original document(5 pages)  中文版
    The present invented write protective card for micro-computer hard disk is composed of data buffer, address selectro, data comparator, RS trigger and analog switch. Only when t be predetermined cipher is keyed in, can be information be written in the hard disk, thus preventing virus infection and decreasing the phenomenon that the original resource in hard disk is damaged. The positive effect is particularly significant for the opened computer library.
Application Number
申请号
91107382 Application Date
申请日
1991.05.03
Title 名称 Writing protective card for microcomputer hard disk
Publication Number
公开号
1066519 Publication Date
公开日
1992.11.25
Approval Pub. Date Granted Pub. Date
International Classification 分类号 G06F12/14
Applicant(s) Name
申请人
Shanghai Polytechnic Univ.
Address 地址 200072
Inventor(s) Name 发明人
Attorney & Agent 代理人 FENG HEFEN

  
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