【摘要】 分析了可编程设备的工作原理和可编程设备虚拟实验环境的功能需求 ,提出了一个由DOSVM ,虚拟设备驱动程序和虚拟设备组成的VPD模型 .在该模型中 ,虚拟设备驱动程序捕获DOSVM的I/O端口访问去驱动虚拟设备 ,并为DOSVM产生虚拟硬件中断 .用VPD模型实现了接口技术虚拟实验环境 .实验表明 ,利用该模型设计的可编程设备虚拟实验环境完全可以满足教学实验的要求 ,尤其适合远程教育实验 .如果进一步研究 ,还可以设计出虚拟教师更多还原

【Abstract】 The mechanism of programmable device and the functional requirement of virtual experiment environment for programmable devices were analyzed, and a VPD (Virtual Programmable Device) model with DOS VM, Virtual Device Drive (VDD) and Virtual Device was presented. In this model, VDD traps DOS VM′ s I/O port access to drive Virtual Device and simulates a hardware interrupt to the DOS VM. Virtual experiment environment for computer interface was created with VPD model. The experiment environment showed that Virtual Experiment Environment for Programmable Devices with VPD model fulfilled the requirement of teaching experiment and fitted distance education experiments更多还原