研制一台性能如下的实验计算机。

（1）　　具有键盘和打印机两种外部设备。

（2）　　外设和内存统一操作指令，程序查询法使用外设。

（3）　　运算器采用单累加器多通用寄存器结构。

（4）　　操作数寻址方式有：

直接地址寻址

立即数寻址

寄存器直接寻址

寄存器间接寻址

（5）　　指令系统至少含有以下指令：

-Development of the performance of a computer experiment is as follows. (1) with two external keyboard and printer equipment. (2) peripherals and memory to operate a unified command, the program queries the use of peripheral Act. (3) computing device using a single accumulator register more general structure. (4) operand addressing ways: directly address the number of addressable register immediately addressed directly addressable register indirect addressing (5) instruction set that contains at least the following commands: