hi i have started work on porting yaffs on wince on s3c2410 processor i was reading yaffs2004talk.pdf under YAFFS Direct Interface u told that we have to provide 7 functions for porting 4 functions are ynandif_WriteChunkToNAND, ynandif_ReadChunkFromNAND, ynandif_EraseBlockInNAND and ynandif_InitialiseNAND the implementation of these functions has reference to CreateFile and DeviceIoControl question 1) so i have to write a stream interface driver is this right ?( i am new to wince) 2) regarding the other 3 functions(time stamping and mutex) which r these functions? Regards and Thanks, Sharath Kumar DM