static void
boot_sector_init( Bytes boot, Bytes info, Wide disk_size, const char* label )
{
int sectors_per_cluster = get_sectors_per_cluster(disk_size);
int sectors_per_fat = get_sectors_per_fat(disk_size, sectors_per_cluster);
int sectors_per_disk = (int)(disk_size / BYTES_PER_SECTOR);
int serial_id = get_serial_id();
int free_count;
if (label == NULL)
label = "SDCARD";
POKEB(boot, 0xeb);
POKEB(boot+1, 0x5a);
POKEB(boot+2, 0x90);
strcpy( (char*)boot + 3, "MSWIN4.1" );
POKES( boot + 0x0b, BYTES_PER_SECTOR ); /* sector size */
POKEB( boot + 0xd, sectors_per_cluster ); /* sectors per cluster */
POKES( boot + 0xe, RESERVED_SECTORS ); /* reserved sectors before first FAT */
POKEB( boot + 0x10, NUM_FATS ); /* number of FATs */
POKES( boot + 0x11, 0 ); /* max root directory entries for FAT12/FAT16, 0 for FAT32 */
POKES( boot + 0x13, 0 ); /* total sectors, 0 to use 32-bit value at offset 0x20 */
POKEB( boot + 0x15, 0xF8 ); /* media descriptor, 0xF8 == hard disk */
POKES( boot + 0x16, 0 ); /* Sectors per FAT for FAT12/16, 0 for FAT32 */
POKES( boot + 0x18, 9 ); /* Sectors per track (whatever) */
POKES( boot + 0x1a, 2 ); /* Number of heads (whatever) */
POKEW( boot + 0x1c, 0 ); /* Hidden sectors */
POKEW( boot + 0x20, sectors_per_disk ); /* Total sectors */
/* extension */
POKEW( boot + 0x24, sectors_per_fat ); /* Sectors per FAT */
POKES( boot + 0x28, 0 ); /* FAT flags */
POKES( boot + 0x2a, 0 ); /* version */
POKEW( boot + 0x2c, 2 ); /* cluster number of root directory start */
POKES( boot + 0x30, 1 ); /* sector number of FS information sector */
POKES( boot + 0x32, BACKUP_BOOT_SECTOR ); /* sector number of a copy of this boot sector */
POKEB( boot + 0x40, 0x80 ); /* physical drive number */
POKEB( boot + 0x42, 0x29 ); /* extended boot signature ?? */
POKEW( boot + 0x43, serial_id ); /* serial ID */
strncpy( (char*)boot + 0x47, label, 11 ); /* Volume Label */
memcpy( boot + 0x52, "FAT32 ", 8 ); /* FAT system type, padded with 0x20 */
POKEB( boot + BYTES_PER_SECTOR-2, 0x55 ); /* boot sector signature */
POKEB( boot + BYTES_PER_SECTOR-1, 0xAA );
/* FSInfo sector */
free_count = sectors_per_disk - 32 - 2*sectors_per_fat;
POKEW( info + 0, 0x41615252 );
POKEW( info + 484, 0x61417272 );
POKEW( info + 488, free_count ); /* number of free clusters */
POKEW( info + 492, 3 ); /* next free clusters, 0-1 reserved, 2 is used for the root dir */
POKEW( info + 508, 0xAA550000 );
}
/**
* @param [out] serial_id serial number of ftdi device
* @return 0 on success<br>-1 on failure
* @sa get_serial_id(unsigned int, std::string&), get_serial_id(std::string&)
* , get_manufacturer(unsigned int, std::string&), get_manufacturer(std::string&)
* , get_product(unsigned int, std::string&), get_product(std::string&)
**/
int get_serial_id(std::string &serial_id) { return get_serial_id(0, serial_id); }
