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本文对磁光盘的接口标准SCSI-Ⅱ进行了分析。在分析的基础上提出了用DOS中断4B来进行磁光盘驱动器中光学头的逻辑道定位。同时，在分析4X密度磁光盘标准ISO／IECDIS15401：1996（E）的基础上，提出了逻辑道和物理道对应关系。这为磁光盘的跨道信号、推挽信号和预制信号的测试奠定了基础。
This paper analyzes the interface standard SCSI-II of magneto-optical disk. Based on the analysis, it is proposed to use DOS interrupt 4B to locate the logical path of the optical head in the magneto-optical disk drive. At the same time, based on the analysis of ISO / IEC DIS 15401: 1996 (E) standard for 4X density magneto-optical disks, the correspondence between logical and physical channels is proposed. This laid the foundation for the test of cross-track signals, push-pull signals and prefabricated signals for magneto-optical disks.