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function GetIdeSerialNumber: pchar;
const IDENTIFY_BUFFER_SIZE = 512;
type
  TIDERegs = packed record
    bFeaturesReg: BYTE; // Used for specifying SMART "commands".
    bSectorCountReg: BYTE; // IDE sector count register
    bSectorNumberReg: BYTE; // IDE sector number register
    bCylLowReg: BYTE; // IDE low order cylinder value
    bCylHighReg: BYTE; // IDE high order cylinder value
    bDriveHeadReg: BYTE; // IDE drive/head register
    bCommandReg: BYTE; // Actual IDE command.
    bReserved: BYTE; // reserved for future use. Must be zero.
  end;
  TSendCmdInParams = packed record
    // Buffer size in bytes
    cBufferSize: DWORD;
    // Structure with drive register values.
   


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