This program is developed under the code in KEIL environment (development environment, where there is no alternative KEIL), features a successful running play " Happy Birthday" song. Required the development of hardware-based chip microcontroller AT89C51.

sing\sing
....\sing.hex
....\sing.lnp
....\sing.LST
....\sing.M51
....\sing.OBJ
....\sing.Opt
....\sing.plg
....\sing.txt
....\sing.Uv2
....\sing_Uv2.Bak
....\STARTUP.A51
sing

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