A method for directly accessing hard disk sectors using ALTERA\'s second-generation embedded soft-core processor NiosII is proposed. This method has the advantages of small size, light weight and high speed, and can provide high-speed video data stream for the vehicle-mounted video on demand system. At the same time, SOPC technology, FAT32 file storage system and hard disk software and hardware interface are introduced. The use of SOPC technology and the principle of hard disk sector reading and writing are explained.
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