SD_IO_FBR
cisptr |= sdmmc_io_read_1(sf0, SD_IO_FBR(num) + 9) << 0;
cisptr |= sdmmc_io_read_1(sf0, SD_IO_FBR(num) + 10) << 8;
cisptr |= sdmmc_io_read_1(sf0, SD_IO_FBR(num) + 11) << 16;
reg = sdmmc_io_read_1(sf0, SD_IO_FBR(sf->number) + 0x000);
sdmmc_io_read_1(sf0, SD_IO_FBR(sf->number) + 0x001);
sdmmc_io_write_1(sf0, SD_IO_FBR(sf->number) +
sdmmc_io_write_1(sf0, SD_IO_FBR(sf->number) +