采用汇编语言编写的利用8255A和8088组成的最大系统简易计算器设计，可以计算+-*三种运算，其中负数可以显示负号，超过-9则显示EO（两位数码管显示结果）-Written in assembly language using the 8255A and 8088 composed of simple calculator design, can be calculated to+-* three operations, in which the negative can show a negative sign, more than-9 EO (two digital display results)