利用VHDL编写的电子琴发生器

				Analysis & Synthesis Status : Successful - Sat Nov 08 17:32:11 2008
				Quartus II Version : 5.1 Build 176 10/26/2005 SJ Full Version
				Revision Name : top
				Top-level Entity Name : TOP
				Family : ACEX1K
				Total logic elements : 145
				Total pins : 26
				Total memory bits : 0
				Total PLLs : 0