ReadPortL
Read longints from a PC port
Declaration
Source position: x86.pp line 27
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
| Name | Description |
|---|---|
| FpIOPerm | Set permission on IO ports |
| ReadPort | Read data from a PC port |
| ReadPortB | Read bytes from a PC port |
| ReadPortW | Read Words 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 |