Support for a 3rd IDE drive

To Add support for three or more IDE hard disk drives in WinNT:

 1) Start Registry Editor

 2) find HKEY_LOCAL_MACHINE

 3) find the \SYSTEM\CurrentControlSet\Services\Atdisk

 4) From the edit menu choose Add Key

 5) Key Name to enter is PARAMETERS, leave class as blank

 6) Open the PARAMETERS key you just made

 7) From edit menu choose Add Key

 8) Key Name is the number of the drive, for example if this is the third
    drive then the drive number is 2 (you start with drives 0 and 1 in your
    bios, lowest number to enter here is 2 and go up from there)

 9) Select the key you just created (ie 2)

 10) From the edit menu choose Add Value

 11) value name is BaseAddress, data type is REG_DWORD (this is the physical
     address of the data register for the controller)

 12) add another named DriveControl, data type is REG_DWORD (this is the 
     physical address of the control register of the controller. Usually this
     is 0x206 off of the BaseAddress register.

  13) add another named Interrupt, data type is REG_DWORD (this is the
      interrupt that the controller will use.

      Here is an example:  BaseAddress = REG_DWORD 0x320
                           DriveControl = REG_DWORD 0x32e
                           Interrupt = REG_DWORD 0xa

Hope this helps.

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