CD-ROM Interface - Absolute Disk Write
  
    | 
       Input  | 
    DOS1 | 
    N | 
    DOS2 | 
    N | 
    
       DOS3  | 
    Y | 
    DOS5 | 
    Y | 
    
       Output  | 
   
  
    | 
       AX  | 
    15h | 
    09h | 
     Error
      Code | 
    AX | 
   
  
    | 
       CX  | 
     Drive
      Number (0=A) | 
      | 
      | 
    BX | 
   
  
    | 
       DX  | 
     Number
      of Sectors to Write | 
      | 
      | 
    CX | 
   
  
    | 
       SI:DI  | 
     Starting
      Sector Number | 
      | 
      | 
    DX | 
   
  
    | 
       ES:BX  | 
     Buffer | 
    Set
      if Error | 
    CF | 
   
 Note:   Currently reserved and non-functional  |