学习新系统执行环境的第一步都是相似的，就是系统如何使用内存。下图粗略的描述了Motorola 68K系列通用微处理器的内存映象-Learning the new system the first step in the implementation of the environment are similar, that is, how to use system memory. The chart a rough descr iption of the Motorola 68K series