Copy protection disk format controller
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 11, 1995
Grant Date -
N/A
app pub date -
May 27, 1993
filing date -
May 27, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A disk format controller for a disk drive operating on a first disk containing an original version of a program and an application-specific decoding rule where signals are recorded according to an application-specific encoding rule, and operating on a second disk containing a copy of the program and a copy of the decoding rule where signals are recorded according to a generally established format. Signals from an address specified by a host unit are transferred to the host unit via an interface so that the original version of the program and the decoding rule are installed in the host unit when the first disk is used and the copy of the program and the copy of the decoding rule are installed in the host unit when the second disk is used. In a copying mode of the host unit, the generally established format is used to control the disk drive to write the copy of the program and the copy of the decoding rule onto a third disk whose recording format is therefore identical to the format of the second disk.
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