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─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:  <bios.h>
 
  Syntax:   unsigned _bios_disk( unsigned service,
                                 struct _diskinfo_t *diskinfo );
            service: _DISK_RESET, _DISK_STATUS, _DISK_READ,
                     _DISK_WRITE, _DISK_VERIFY, _DISK_FORMAT
 
  Returns:  the AX register value.
                                    -♦-