[Overview][Procedures and functions][Index] Reference for unit 'x86' (#rtl)

ReadPortW

Read Words from a PC port

Declaration

Source position: line 0

function ReadPortW(

  Port: LongInt

):Word;

procedure ReadPortW(

  Port: LongInt;

  var Buf;

  Count: LongInt

);

Description

The procedural form of ReadPortW reads Count words from port Port and stores them in Buf. There must be enough memory allocated at Buf to store Count words.

The functional form of ReadPortW reads 1 word from port B and returns the word that was read.

Note that you need permission to read a port. This permission can be set by the root user with the FpIOPerm call.

Errors

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

See also

FpIOPerm

  

Set permission on IO ports

ReadPort

  

Read data from a PC port

ReadPortB

  

Read bytes from a PC port

ReadPortL

  

Read longints from a PC port

WritePort

  

Write data to PC port

WritePortB

  

Write byte to PC port

WritePortL

  

Write longint to PC port.

WritePortW

  

Write Word to PC port

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