Where starting EF2000 with V1 hardware emulation in fullscreen mode, there are instances where the borders between the game display and the monitor edges have graphical corruption and flickering. This may be dependent on individual computer systems and the configuration of the video card settings. This issue is caused by one of the two buffers not clearing before EF2000 displays full screen in V1 hardware emulation mode. Attached is a patch to fix the issue (at least in my case).