This intelligent system mainly solves the contention for VRAM between the main CPU in CNC system and 6845 CRTC so that 6845 CRTC of display system can visit VRAM during required period and the main CPU of CNC system can visit VRAM whenever necessary.

• 本系统主要解决数控系统中主CPU与6845CRTC争夺显示缓存的矛盾。 保证了6845CRTC对显示缓存操作的时间要求；