公开(公告)号：US4648032A

公开(公告)日：1987-03-03

申请号：US701327

申请日：1985-02-13

申请人： Hector Romero, Jr. ,  Joe C. St. Clair ,  James D. Wagoner

发明人： Hector Romero, Jr. ,  Joe C. St. Clair ,  James D. Wagoner

IPC分类号： G06F3/153 ,  G06F12/00 ,  G06F12/02 ,  G09G1/16 ,  G09G5/00 ,  G09G5/393 ,  G09G5/395 ,  G06F1/00

CPC分类号： G09G5/001 ,  G06F3/153 ,  G09G2360/127 ,  G09G2360/18 ,  G09G5/393 ,  G09G5/395

摘要： A counter is used to concurrently refresh a video display and a memory associated with such video display. Address bits are output from the counter to the sync decode logic used to refresh the display as well as to multiplexing means connected to the associated memory. The multiplexing means has three pairs of inputs. The first pair of inputs comprises refresh addresses from the counter for refreshing the memory array. The second pair of inputs to the multiplexing means comprises memory update addresses for writing new information into the memory. A third pair of inputs to the multiplexing means performs two functions. The first function enables the multiplexing means to output either the update addresses or the refresh addresses depending on the state of such inputs. The second function of the third pair of inputs is to identify the output of said multiplexing means as either a row address or a column address to the associated memory. The apparatus and technique disclosed herein is especially pertinent when a "nibble mode" dynamic RAM is used as the memory.

摘要翻译： 计数器用于同时刷新视频显示器和与这种视频显示器相关联的存储器。 地址位从计数器输出到用于刷新显示器的同步解码逻辑以及连接到相关存储器的多路复用装置。 复用装置具有三对输入。 第一对输入包括用于刷新存储器阵列的来自计数器的刷新地址。 多路复用装置的第二对输入包括用于将新信息写入存储器的存储器更新地址。 多路复用装置的第三对输入执行两个功能。 第一功能使多路复用装置根据这种输入的状态输出更新地址或刷新地址。 第三对输入的第二功能是将所述多路复用装置的输出识别为相关存储器的行地址或列地址。 当使用“半字节模式”动态RAM作为存储器时，本文公开的装置和技术是特别相关的。