DATA0~DATA15是数据线，硬盘的的数据线要16根，地址线只有3根，通过硬盘寄存器写操作来对硬盘的那个扇区进行操作-DATA0 ~ DATA15 is the data line, the hard drive' s data line is to be 16, the address line only three, through the hard disk write operation to register on the hard drive that sector to