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 |