This article briefly introduced the characteristic of ISA Bus Ethernet Controller RTL8019AS; Introduced the hardware Design approach of using 80C196 to control RTL8019AS to convert the RS232 signals into the Ethernet-transmissible signals.

• 简要介绍了ISA总线型以太网络控制芯片RTL8019AS的使用特性:说明了使用80C196单片机控制RTL8019AS将RS232总线信号转换成以太网可传输信号的硬件电路设计方案。