研制一台性能如下的实验计算机：

(1) 能使用键盘和打印机两种外设

(2) 运算器采用单累加器多寄存器结构。

(3) 能实现PC相对寻址和变址器变址寻址这两种操作寻址方式，指令系统中有相应的指令。

　　如：　　SJMP rel　　　　　　　　　　 (PC) + rel -> PC

　　　　　　LD A,addr[Rx]　　　　　　　　 (addr + (Rx)) -> A

　　提示：需要自己设置IAB到IDB的数据缓冲通路

(4) 指令系统中有子程序调用指令（CALL addr）和子程序返回指令（RET）.

　　提示：需要自己设置堆栈。

(5) 能执行将键入的四个以上两位十进制数排序后打印出来（程序自编）。-Development of the performance of a computer experiment is as follows: (1) keyboard and printer can use two types of peripherals (2) computing devices more than a single accumulator register structure. (3) to achieve PC relative addressing and indexing device addressing addressing these two operations, a corresponding instruction in the instruction. Such as: SJMP rel　(PC)+ rel->　PC LD A, addr [Rx]　(addr+ (Rx))->　A Tip: IAB needs its own set of data to the buffer IDB pathway (4) instruction in subroutine call instructions (CALL addr) and the subroutine return instruction (RET). NOTE: need to set up their own stack. (5) will be able to perform more than four typed a decimal number two ranking after the print out (own procedures). Such as: 66 71 85 99