还是一个verilog原代码,可以在modelsim下运行,强烈推荐下载

				Sat Feb 25 17:50:49 ?????????????????? 2006
				Trace back: invalid command name ".tree"
				    while executing
				"$::vsimPriv(defaultSignals).tree cursel"
				    (procedure "SignalsToggleMenuUpdate" line 2)
				    invoked from within
				"SignalsToggleMenuUpdate tools.toggle_Coverage add"
				    (menu preprocess)
				  2: ::tkerror {invalid command name ".tree"}
				  1: ::bgerror {invalid command name ".tree"}