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发明名称
PROGRAM COPY PREVENTING METHOD
摘要
PURPOSE:To prevent a game soft from being easily copied. CONSTITUTION:A space part is provided in the address space of a mask ROM 10 which stores a game program. Then, at the time of copying the mask ROM 10, the space part is read as an image.
申请公布号
JPH04354022(A)
申请公布日期
1992.12.08
申请号
JP19910155237
申请日期
1991.05.31
申请人
SEGA ENTERP LTD
发明人
OTSUJI KENJI
分类号
G06F21/22;A63F13/00;G06F9/06
主分类号
G06F21/22
代理机构
代理人
主权项
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