FC40-4F Hard Drive Access
                           =========================

      SCSI Interface              IDE Interface
Addr  Write Action  Read Action   Write Action     Read Action
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FC40  Data Out      Data In       Data Low         Data Low  
FC41  -             Status        Special          Error   
FC42  Select        -             Count            Count
FC43  INT enable    -             Sector           Sector
FC44                              Cylinder Low     Cylinder Low
FC45                              Cylinder High    Cylinder High
FC46                              Head+Drive       Head+Drive
FC47                              Command          Status
FC48                              Data High        Date High
FC49                              -                -
FC4A                              -                -
FC4B                              -                -
FC4C                              -                -
FC4D                              -                -
FC4E                              Digital Output   Alternative Status
FC4F                              -                Drive Data