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本文主要结合STD工业控制机（以下简称工控机）的特点，设计并研制了适用于STD工控机的配有8257DMA控制器的高速串行通讯卡，并已研制成了产品。文中详细介绍了8257DMA控制器及8274多规程串行控制器的芯片功能，并且对通讯卡各部分的硬件及软件也作了详细的说明。
In this paper, we design and develop a high-speed serial communication card with 8257DMA controller which is suitable for STD industrial computer and has developed a product based on the characteristics of STD industrial control machine (hereinafter referred to as IPC). In this paper, the chip functions of 8257DMA controller and 8274 multi-protocol serial controller are introduced in detail, and the hardware and software of each part of the communication card are also described in detail.