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    • 9. 发明授权
    • Video display terminal with partitioned screen
    • 带分屏的视频显示终端
    • US4278973A
    • 1981-07-14
    • US080732
    • 1979-10-01
    • Michael A. HughesJeremy S. M. JohnsonGraham C. E. Winn
    • Michael A. HughesJeremy S. M. JohnsonGraham C. E. Winn
    • G06F3/153G06F17/21G09G1/00G09G5/08G09G5/14
    • G09G1/007G09G5/14
    • A video data display terminal includes a video display, eg., a CRT, and a character buffer for storing character bytes representing characters to be displayed on the screen of the video display device. The terminal further includes microprocessing means for receiving data from a keyboard device connected thereto or alternately from a host processor for entry into the character buffer. The microprocessing means are further adapted to define one or more partitions on the screen of the video display device. Data integrity within these partitions is maintained by assigning margin attribute bytes to the margin of each partition. Refresh hardware including refresh logic control means, a line buffer, a character generator and a serializer is provided to write data within the character buffer to the video display screen.
    • 视频数据显示终端包括诸如CRT的视频显示器和用于存储表示要在视频显示设备的屏幕上显示的字符的字符字节的字符缓冲器。 终端还包括微处理装置,用于从连接到其上的键盘装置接收数据或者从主机处理器接收数据以进入字符缓冲器。 微处理装置还适于在视频显示装置的屏幕上定义一个或多个分区。 通过将margin属性字节分配给每个分区的边距来维护这些分区内的数据完整性。 提供包括刷新逻辑控制装置,行缓冲器,字符发生器和串行器的刷新硬件,以将字符缓冲器内的数据写入视频显示屏。