在视频和数据缓冲应用中,双端口视频RAM的速度明显快于标准动态RAM(DRAM)。但是它的半字节宽高速串行口依然是系统的瓶颈,因为在任一时刻,数据只能以一个方向传输。再者,高性能视频子系统和新一代智能磁盘控制器需要叠加的数据传输,使得新数据可以在旧数据离开系统的同时进入系统。 有几种方法试图满足这种系统大流通量需求。有的使用多组存储器芯片,这些存储器组需要复杂的控制装置协调操作。但是,Micron Technology In video and data buffering applications, dual-port video RAM is significantly faster than standard dynamic RAM (DRAM). But its nibble-wide, high-speed serial port remains the bottleneck in the system because data can only be transmitted in one direction at any one time. Furthermore, high-performance video subsystems and next-generation intelligent disk controllers require overlay data transfers so that new data can enter the system as the old data leaves the system. There are several ways to try to meet this system’s huge liquidity needs. Some use multiple sets of memory chips, which require complex control devices to coordinate operations. However, Micron Technology