模拟系统中，主存部分分为两部分，一部分是系统区，这里只存放进程控制块和内存分配表，一部分是用户区，这里主要是对用户区的管理。

系统区包括PCB区域、内存空间分配表；

用户区用数组模拟，大小为512字节，存储管理采用动态分区存储管理方式。-Simulation system, part of main memory is divided into two parts, the system area, only the storage process control block and memory allocation table, in part, the user area, where the main areas of user management. System areas, including PCB area, memory space allocation table　users area with an array of simulation, the size of 512 bytes, storage management using dynamic partitioning storage management.