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STD总线标准最早的STD总线结构是一个面向工业控制8位微型机的总线结构,主要支持各种8位和准16位的CPU,如Z80,6502,8085,6800,以及准16位的8088等。以后,为了能适应16位的CPU,采用了一种叫做“周期窃取”和“总线复用”的技术,扩充了数据线和地址线的定义,变成了8位和16位兼容的总线结构。除了支持8位CPU外,还支持象8086,
STD bus standard The earliest STD bus structure is a bus structure for industrial control 8-bit microcomputer, the main support for a variety of 8-bit and 16-bit CPU, such as Z80, 6502,8085,6800, and quasi 16-bit 8088, etc. . Later, in order to be able to adapt to the 16-bit CPU, a technique called “cycle stealing” and “bus multiplexing” was adopted to expand the definition of data lines and address lines into 8-bit and 16-bit Compatible bus structure. In addition to supporting 8-bit CPU, but also support as 8086,