论文部分内容阅读
在数据采集和控制系统中,模拟量输入、输出和开关量输入、输出设备往往采用并行接口方式和计算机连接成系统,以便获得较高的传输速度。在PDP—11计算机系统中,可以采用DRV11通用并行接口来连接I/O设备。图1为DRV11的方框图。LSI—11/23 处理机可以寻址控制和状态寄存器DRCSR、输出缓冲器DROUTBUF 以及输入缓冲器
In the data acquisition and control system, analog input, output and digital input and output devices are often connected to the computer using a parallel interface and into the system, in order to obtain a higher transmission speed. In PDP-11 computer systems, I / O devices can be connected using the DRV11 universal parallel interface. Figure 1 is a block diagram of the DRV11. The LSI-11/23 processor can address the control and status register DRCSR, the output buffer DROUTBUF, and the input buffer