FSCreateMBR Function

int FSCreateMBR(
    unsigned long firstSector, 
    unsigned long numSectors
);

This function can be used to create a master boot record for a device. Note that this function should not be used on a device that is already formatted with a master boot record (i.e. most SD cards, CF cards, USB keys). This function will fill the global data buffer with appropriate partition information for a FAT partition with a type determined by the number of sectors available to the partition. It will then write the MBR information to the first sector on the device. This function should be followed by a call to FSformat, which will create a boot sector, root dir, and FAT appropriate the the information contained in the new master boot record. Note that FSformat only supports FAT12 and FAT16 formatting at this time, and so cannot be used to format a device with more than 0x3FFD5F sectors.

The I/O pins for the device have been initialized by the InitIO function.

None

This function can damage the device being used, and should not be called unless the user is sure about the size of the device and the first sector value.