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redboot load.c


Hi all:
   When I read the redboot/load.c,I notice the following code in do_load: 

#ifdef CYGPKG_REDBOOT_NETWORKING
    mode = MODE_TFTP;
#else
    mode = MODE_YMODEM;
#endif

    Whether it is nessary to set the mode to ymodem mode when we exclude networking.And did the ymode protocl does need a real modem?If any one knows the reason?
 
Best Regards!
                        yours 
                              T.poper

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