Int 13 Fn 12  - Syquest - Start/stop Scsi Disk                             [d]

   AH = 12h
   AL = subfunction
       00h start disk
       01h stop disk
   CX = wait flag
       00h wait for ready
       01h don't wait for ready
   DL = hard drive ID (bit 7 for hard disks must be set)

Return: CF set on error
   CF clear if successful
   AH = status
       00h successful
       01h invalid function request
       80h timeout

See Also: AH=12h"Future Domain",AH=13h"SyQuest"