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    WritePortB

    Write byte to PC port.

    Declaration

    Source position: x86.pp line 42

    procedure WritePortB(Port: LongInt; Value: Byte);

    procedure WritePortB(Port: LongInt; var Buf; Count: LongInt);

    Description

    The first form of WritePortB writes 1 byte to port Port. The second form writes Count bytes from Buf to port Port.

    Remark:

    You need permission to write to a port. This permission can be set with root permission with the FpIOPerm call.

    Errors

    In case of an error (not enough permissions to write to this port), runtime 216 (Access Violation) will occur.

    See also

    Name Description
    FpIOPerm Set permission on IO ports.
    WritePort Write data to PC port.
    WritePortL Write longint to PC port.
    WritePortW Write Word to PC port.
    ReadPortB Read bytes from a PC port.
    ReadPortL Read longints from a PC port.
    ReadPortW Read Words from a PC port.