公开(公告)号：US4751446A

公开(公告)日：1988-06-14

申请号：US805838

申请日：1985-12-06

申请人： Juan A. Pineda ,  Michael C. Matter

发明人： Juan A. Pineda ,  Michael C. Matter

IPC分类号： G09G5/06 ,  G06F3/153 ,  G09G1/16 ,  G09G1/28

CPC分类号： G09G5/06

摘要： In a display system for a data processing system color words for display at sequential pixels are obtained by addressing a lookup table memory with addresses obtained from a bit map display memory. Initialization data is stored in the display memory and, during an initialization procedure, is applied to the lookup table along the same data path used by the addresses during display. In one system a multiplexer takes the form of a shift register into which sequential pixel addresses are applied in parallel to interleaved stages. The two LUT addresses are read out sequentially by shifting the shift register. During the initialization procedure shifting is disabled and the interleaved address and data bytes are applied along separate address and data lines to the lookup table. One data path can be utilized for either eight plane or four plane display. In another system, a buffer storage is provided between the address input to the LUT memory and the data input and, during the initialization procedure, data is stored in the buffer in alternate cycles of the display memory output.

摘要翻译： 在用于数据处理系统的显示系统中，通过用从位图显示存储器获得的地址寻址查找表存储器来获得用于在顺序像素处显示的彩色字。 初始化数据存储在显示存储器中，并且在初始化过程期间，沿着显示期间地址使用的相同数据路径将其应用于查找表。 在一个系统中，多路复用器采用移位寄存器的形式，顺序像素地址并行地应用于交错级。 通过移位移位寄存器顺序读出两个LUT地址。 在初始化过程中，移位被禁用，交错地址和数据字节沿单独的地址和数据线应用到查找表。 一个数据路径可以用于八个平面显示器或四个平面显示器。 在另一系统中，在LUT存储器的地址输入和数据输入之间提供缓冲存储器，并且在初始化过程期间，数据以显示存储器输出的替代周期存储在缓冲器中。