SD_IO_FBR_START
#define SD_IO_FBR_START_F(n) (SD_IO_FBR_START + (n-1) * SD_IO_FBR_F_SIZE)
addr = SD_IO_FBR_START * f->fn + SD_IO_FBR_IOBLKSZ;
fbr_addr = SD_IO_FBR_START * fn + SD_IO_FBR_CIS_OFFSET;
fbr_addr = SD_IO_FBR_START * fn;
fbr_addr = SD_IO_FBR_START * i + 0x9;