This "ping-pong" buffering technique ensures that the video output never reads memory while the CPU is halfway through writing to it. In the context of an arcade machine, this guarantees a rock-solid 60Hz refresh rate with zero graphical artifacts, even when the screen is filled with moving objects. The schematic includes two 74LS245 bus transceivers per bank to handle the directional switching of data flow between the CPU and the video generator.
Provides EPROM and firmware downloads for the MBX-252. mbx252 schematic full
While full schematics are often proprietary, they are frequently available on technician-focused repositories and community forums: This "ping-pong" buffering technique ensures that the video
Often designed for AMD-based platforms in the VPCEL series. Key Circuit Sections: mbx252 schematic full