File list (Check if you may need any files):
1-简易电子琴设计与制作
......................\ASM
......................\...\电子琴实验
......................\...\..........\Buzz_sing
......................\...\..........\Buzz_sing.hex
......................\...\..........\Buzz_sing.lnp
......................\...\..........\Buzz_sing.M51
......................\...\..........\Buzz_sing.Opt
......................\...\..........\Buzz_sing.plg
......................\...\..........\Buzz_sing.Uv2
......................\...\..........\SING.ASM
......................\...\..........\SING.LST
......................\...\..........\sing.OBJ
......................\C51
......................\...\EX
......................\...\EX.C
......................\...\EX.HEX
......................\...\EX.LNP
......................\...\Ex.LST
......................\...\EX.M51
......................\...\Ex.OBJ
......................\...\EX.Opt
......................\...\EX.PLG
......................\...\EX.Uv2
......................\...\EX3.Opt
......................\...\EX_Opt.Bak
......................\...\EX_Uv2.Bak
......................\...\STARTUP.A51
......................\...\STARTUP.LST
......................\...\STARTUP.OBJ