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软盘子系统是微机中使用最多的外存设备之一,也是故障率较高的部分.软盘子系统包括软磁盘、软盘驱动器、软盘适配器及相应的驱动程序.由于软盘与内存之间的数据交换是采用DMA方式进行的,因而它又和主机系统板上的DMA控制部件紧密相连.这其中的任何一部分出现故障,均会导致软盘子系统无法正常工作.当出现故障时,其维修工作可分为两步:首先通过替换各插件来确定故障的大致部位.这要求对整个微机系统的工作原理及软件知识有比较清楚的了解.其次是维修有故障的板、卡、设备,找到具体损坏的
The floppy disk subsystem is one of the most widely used external storage devices in a microcomputer and also has a high failure rate. The floppy disk subsystem includes a floppy disk, a floppy disk drive, a floppy disk adapter, and a corresponding driver. Since the data exchange between the floppy disk and the memory is Using DMA, so it is connected to the DMA control unit on the host system board, and any failure of any of them can cause the floppy disk subsystem to not work properly. In the event of a failure, the repair work can be divided into Two steps: First of all by replacing the plug-in to determine the approximate location of the fault. This requires the entire computer system works and software knowledge have a more clear understanding. Second is to repair faulty boards, cards, equipment, to find the specific damage