X-Hacker.org- Interrupts & Ports

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        Get pointer scale factor

        Entry:
          AH = 12h
          BX = 1200h
          STACK: DWORD object handle for pointer

        Return:
          STACK: DWORD pointer pos scaled as if window were
                        this many colums wide
                 DWORD pointer pos scaled as if window were
                        this many rows high

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