目前市场上出售的32位微处理器(例如MC68020,Intel的80386,等)可达到的处理速度为每秒3—4M条指令(3—4MIPS)。它们具有流水线作业能力,又能交叉存取动态随机存储器(DRAM)阵列。为了充分发挥32位微处理器的全部潜在能力,在设计32位微型计算机系统时,往往需要高性能,大容量的存储系统。然而从系统的价格方面来考虑,则宁愿使用慢,而价廉的大容量存储器。同时为了不浪费微处理器能力, The current market for 32-bit microprocessors (such as the MC68020, Intel’s 80386, etc.) achieves a processing speed of 3-4M instructions per second (3-4MIPS). They have pipelined capabilities and interleaved arrays of dynamic random access memory (DRAM). To take full advantage of the full potential of 32-bit microprocessors, high-performance, large-capacity storage systems are often required when designing 32-bit microcomputer systems. However, considering the price of the system, it is preferable to use slow, inexpensive mass storage. At the same time in order not to waste the ability of the microprocessor,