DIY drive mp3 procedures, a foreigner to write, they are completely, but I do not understand a bit

Packet : 67506259armok0120845.zip filelist
ata.c
ata.dp2
ata.h
ata.i
ata.lis
ata.o
ata.s
ata._c
ata._h
fat.c
fat.dp2
fat.h
fat.i
fat.lis
fat.o
fat.s
fat._c
fat._h
generic.c
generic.dp2
generic.h
generic.i
generic.lis
generic.o
generic.s
generic._c
generic._h
main.c
main.dp2
main.h
main.i
main.lis
main.s
main._c
main._h
MP3.cof
MP3.dbg
MP3.hex
MP3.lk
MP3.lst
MP3.mak
MP3.mp
MP3.prj
MP3.SRC
MP3Player.c
MP3Player.dp2
MP3Player.h
MP3Player.i
MP3Player.lis
MP3Player.o
MP3Player.s
MP3Player._c
MP3Player._h
ouput.c
ouput._c
remote.c
remote.dp2
remote.h
remote.i
remote.lis
remote.o
remote.s
remote._c
remote._h
usb.c
usb.dp2
usb.h
usb.lis
usb.o
usb.s
usb._c
usb._h
vs1001.c
vs1001.dp2
vs1001.h
vs1001.i
vs1001.lis
vs1001.o
vs1001.s
vs1001._c
vs1001._h

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