ReadPortW
Read Words from a PC port
Declaration
Source position: x86.pp line 26
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
| Name | Description |
|---|---|
| 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 |