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WritePortB

Write byte to PC port

Declaration

Source position: x86.pp line 37

  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
ReadPortB Read bytes from a PC port
ReadPortL Read longints from a PC port
ReadPortW Read Words from a PC port
WritePort Write data to PC port
WritePortL Write longint to PC port.
WritePortW Write Word to PC port