+struct drive_s {
+ u8 type; // Driver type (DTYPE_*)
+ u8 floppy_type; // Type of floppy (only for floppy drives).
+ struct chs_s lchs; // Logical CHS
+ u64 sectors; // Total sectors count
+ u32 cntl_id; // Unique id for a given driver type.
+ u8 removable; // Is media removable (currently unused)
+
+ // Info for EDD calls
+ u8 translation; // type of translation
+ u16 blksize; // block size
+ struct chs_s pchs; // Physical CHS
+};
+
+#define DISK_SECTOR_SIZE 512
+#define CDROM_SECTOR_SIZE 2048
+
+#define DTYPE_NONE 0x00
+#define DTYPE_FLOPPY 0x01
+#define DTYPE_ATA 0x02
+#define DTYPE_ATAPI 0x03
+#define DTYPE_RAMDISK 0x04
+#define DTYPE_CDEMU 0x05
+#define DTYPE_USB 0x06
+#define DTYPE_VIRTIO_BLK 0x07
+#define DTYPE_AHCI 0x08
+
+#define MAXDESCSIZE 80
+
+#define TRANSLATION_NONE 0
+#define TRANSLATION_LBA 1
+#define TRANSLATION_LARGE 2
+#define TRANSLATION_RECHS 3
+
+#define EXTTYPE_FLOPPY 0
+#define EXTTYPE_HD 1
+#define EXTTYPE_CD 2
+
+#define EXTSTART_HD 0x80
+#define EXTSTART_CD 0xE0
+
+
+/****************************************************************
+ * Function defs
+ ****************************************************************/
+
+// block.c
+extern u8 FloppyCount, CDCount;
+extern u8 *bounce_buf_fl;
+struct drive_s *getDrive(u8 exttype, u8 extdriveoffset);
+int getDriveId(u8 exttype, struct drive_s *drive_g);
+void map_floppy_drive(struct drive_s *drive_g);
+void map_hd_drive(struct drive_s *drive_g);
+void map_cd_drive(struct drive_s *drive_g);
+int process_op(struct disk_op_s *op);
+int send_disk_op(struct disk_op_s *op);
+int bounce_buf_init(void);
+