说明：  1、 （1）熟悉8086小模式下基本系统的电路结构：系统电路、总线形成、端口空间分配等；（2）学会8086的运行环境的配置：内存空间、代码空间、时钟频率等；（3） Proteus下仿真调试工具的使用方法；（5）Proteus提供的实验仪器和测试手段的使用方法。 2、 用通用接口芯片实现无条件I/O传送。用一片74LS245做输出端口控制8个LED灯。要求LED灯从上到下依次点亮一次，每个灯亮1s。画出电路图、按要求编写程序，在仿真环境下调试通过。
(1, (1) be familiar with the circuit configuration mode under 8086 small basic systems: System circuit, the bus is formed, port space allocation (2) Institute 8086 operating environment configurations: memory space, code space, the clock frequency (3 ) method using the following Proteus simulation debugging tools (5) test equipment and test instruments provided by the use of Proteus. 2, with a common interface chip unconditionally I/O transfers. 74LS245 do with a piece of output port control 8 LED lights. Requirements LED lights were lit again top to bottom, each light 1s. Draw the circuit, according to the requirements of programming, under simulation debugging environment.)