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  Description:  Initialize Pointing Device Interface      [PS/2]
 
  Sets the data package size for the system's mouse or other pointing device,
  and initializes the resolution, sampling rate, and scaling to their default
  values.
 
  Input                           Output
  ════════════════════            ═══════════════════════════════════
  AH=C2H                          If function successful
  AL=05H                          Carry flag=clear
  BH=data package size            AH=00H
     in bytes (1-8)               If function unsuccessful
                                  Carry flag=set
                                  AH=status (see Int 15H Function C2H
                                             Subfunction 00H)
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