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

# ReadPortL

Read longints from a PC port

## Declaration

Source position: x86.pp line 26

`function ReadPortL(`
`Port: LongInt`
`):LongInt; procedure ReadPortL(`
`Port: LongInt;`
`var Buf;`
`Count: LongInt`
`);`

## Description

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

The functional form of ReadPortL reads 1 longint from port B and returns the longint 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
ReadPortW |  | Read Words from a PC port
ReadPortB |  | Read bytes 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

Documentation generated on: May 14 2021