ReadPortB function
Read bytes from a PC port.
Declaration
function ReadPortB(Port: LongInt): ByteDescription
The procedural form of ReadPortB reads Count bytes from port
Port and stores them in Buf. There must be enough memory
allocated at Buf to store Count bytes.
The functional form of ReadPortB reads 1 byte from port B
and returns the byte 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
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.