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两台S8000作主机,可以使加法运算速度达110万次/秒,乘法15万次/秒,除法10万次/秒。在系统中以D_5作前置机,以双口存贮器作为前置机与主机之间的数据通道以及其他一些相应措施,可以使数据吞吐率达5.27MB/s。这样I/O所占主机时间很少,主机主要用于运算。微型机正以其优越的性能价格比进入工业领域,但是某些领域,例如较大型的过程控制系统,则仍是小型机的势力范围。这主要是由于微型机的性能所限,特别是其速度较低,无法处理某些路数多、要求传输速率高及处理工作量大的任务。1983年,我们在Zilog公司的16位微型机S8000上做了些工作。S8000系统结构严谨,而且其操作系统ZEUS(一种UNIX版本)尚未破译出来。因此,当时在S8000上动大手术是困难的,同时,S8000上只配有串行口(即打印机约定的并行口),无法高速传输数据。这是我们工作的前提条件。
Two S8000 as the host, you can make the addition speed of 1.1 million times / second, multiplication of 150,000 times / second, the division of 100,000 times / second. In the system to D_5 as front-end machine, dual-port memory as a front-end host and the data channel between the host and other appropriate measures to make the data throughput rate of 5.27MB / s. This I / O accounted for a small host time, the host is mainly used for computing. Microcomputers are entering the industrial space at a superior price / performance ratio, but some areas, such as larger process control systems, remain the power of minicomputers. This is mainly due to the limited performance of the microcomputers, in particular its low speed, the inability to handle certain routes, the high transmission rate and the heavy workload. In 1983, we did some work on Zilog’s 16-bit microcomputer S8000. S8000 system structure is rigorous, and its operating system ZEUS (a UNIX version) has not yet deciphered. Therefore, it was difficult to move the big surgery on the S8000 at the same time, at the same time, the S8000 only had a serial port (that is, the parallel port agreed by the printer) and could not transfer data at a high speed. This is a prerequisite for our work.