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一、前言Z8000是一种高性能的16位微处理器,由于它的指令系统丰富、处理能力强,在实时系统(特别是航空、航天领域)中得到应用。在实时应用领域,许多系统要求快速响应和高速交换数据,虽然Z8000有块传送和字符串搜索指令,数据传送速率远高于其它CPU,但也只有大约800kB/s,难以满足某些系统的要求。这时,往往需要采用DMA传送方式。目前常用的DMA控制器都是为8位系统
I. Preface The Z8000 is a high-performance 16-bit microprocessor. Due to its rich instruction set and high processing power, the Z8000 is used in real-time systems (especially in aerospace and aerospace). In real-time applications, many systems require fast response and high-speed data exchange. Although the Z8000 has block transfer and string search instructions and data transfer rates much faster than other CPUs, it is only around 800 kB / s, making it difficult to meet some system requirements . At this time, often need to use DMA transfer mode. DMA controllers are commonly used for 8-bit systems