with 89c51 SCM and USBD12 combination of circuit and the source

IDE-USB
.......\IDE-USB.jpg
.......\IDE.C
.......\IDE.h
.......\IDE.LST
.......\IDE.OBJ
.......\MASS_STORAGE.H
.......\PDIUSBD12.h
.......\USB
.......\Usb.c
.......\USB.H
.......\USB.hex
.......\USB.LST
.......\USB.M51
.......\USB.OBJ
.......\USB.Opt
.......\USB.plg
.......\USB.Uv2
.......\USB_Opt.Bak

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