3/20/2012
[EMU/WIN32] fix not to render screen to Direct3D9 buffer while recording video
[VM/DEVICE] add new virtual function to nitify ei opecode is done on cpu
[VM/YM2151] fix to raise/clear irq line when it is changed as level signal
[VM/YM2203] fix to raise/clear irq line when it is changed as level signal
[VM/Z80] fix to notify ei opecode is done on z80 core

3/15/2012
[EMU/WIN32] fix to renew vm class instance to change cpu clock in reset()