## Display Device Driver Reference for OS/2

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### Function 100h - Flags

Flags

Defined as follows:

    Bit 0 indicates whether the physical video buffer needs to be updated.

          OFF = The physical video buffer must not be updated.

          ON  = The physical video buffer must be updated.

    Bit 1 indicates whether the logical video buffer needs to be updated.

          OFF = The logical video buffer may optionally be updated.

          ON  = The logical video buffer must be updated.

    Bit 2 indicates that attribute information in the user buffer is in CGA

    format and might need to be translated into the format used by the device.

    This bit is set for VioWrtTTY calls any time that ANSI is active, because

    ANSI recognizes only CGA format attributes.

          OFF = Use attributes in existing format.

          ON  = Translation to or from CGA format required.

    Bits 3-15 are reserved and must be OFF.