gistfile1.txt

typedef unsigned char BYTE;
typedef unsigned short WORD;
typedef unsigned long DWORD;
typedef int BOOL;

struct CDROM_iso9660_directory_record {
  uint8_t	record_size;
  uint8_t	num_sectors_extattrrec;
  uint32_t	data_sector;
  uint32_t	data_sector_be;
  uint32_t	data_size;
  uint32_t	data_size_be;
  
  WORD year;
  BYTE month;
  BYTE day;
  BYTE hour;
  BYTE minute;
  BYTE second;

  uint8_t	flags;
  uint8_t	interleaved_unit_size;
  uint8_t	interleaved_gap_size;
  uint16_t	volume_seq;
  uint16_t	volume_seq_be;
  uint8_t	identifier_length;
  uint8_t	identifier[1];
} __attribute__ ((packed)) CD_iso9660_directory_record;

struct disk_packet
{
    byte size_pack;
    byte reserved1;
    byte no_of_blocks;
    byte reserved2;
    word offset;
    word segment;
    dword lba1;
    dword lba2;
} __attribute__((packed)) disk_pack;


void LBASectorRead(void *buffer, unsigned long lba)
{
    unsigned char bError = 0;
    REGS regs;

    disk_pack.size_pack = 16;
    disk_pack.no_of_blocks = 1;
    disk_pack.reserved1 = 0;
    disk_pack.reserved2 = 0;
    disk_pack.segment = (((unsigned int)buffer >> 16) << 12);
    disk_pack.offset  =  ((unsigned int)buffer & 0xffff);
    disk_pack.lba2 = lba >> 32;
    disk_pack.lba1 = lba & 0xffffffff;

	regs.b.ds = (((unsigned int)&disk_pack >> 16) << 12);
	regs.b.si =  ((unsigned int)&disk_pack &0xffff);
	regs.b.dl = 0x9f;
	regs.b.ah = 0x42;
	int386(0x13,&regs,&regs);

    //printf("Error: %d\n",regs.b.ah);

}


	struct CDROM_iso9660_directory_record dr;
	LBASectorRead( &dr,24-1);
	dr.identifier[
	dr.identifier_length] = '\0';
	printf("cd: %s",dr.identifier); nl();