The obvious disadvantage to this was that all processes had access to the frame buffer, so could corrupt the display easily and synchronizing drawing between applications was very difficult.

The system makes use of two group of outer SRAM to buffer the frame data, and USES ping-pong operation of the SRAM to achieve the video display in series.

This design USES a frame rate control algorithm based on space-hash to improve the quality of the LCD display. It USES two-level buffer structure to ensure steady output flow.