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 |  | 
       INT 21 - DOS - ALLOCATION TABLE INFORMATION FOR SPECIFIC DEVICE        
  
    
      | 
         Input  | 
      DOS1 | 
      N | 
      DOS2 | 
      Y | 
      
         DOS3  | 
      Y | 
      DOS5 | 
      Y | 
      
         Output  | 
     
    
      | 
         AX  | 
      1Ch | 
        | 
        | 
      Sectors/Alloc | 
      AX | 
     
    
      | 
         BX  | 
        | 
        | 
        | 
        | 
        | 
     
    
      | 
         CX  | 
        | 
        | 
      Bytes
        per Sector | 
      CX | 
     
    
      | 
         DX  | 
        | 
      Drive
        (0=A, 1=B) | 
      Allocation
        Units on Disk | 
      DX | 
     
    
      | 
         ES:DI  | 
        | 
      Points
        to FAT ID Byte | 
      DS:BX | 
     
   
 
See Also 1Bh 36h  |