[Overview][Constants][Types][Procedures and functions][Variables][Index] Reference for unit 'go32' (#rtl)

outportb

Write byte to I/O port

Declaration

Source position: go32.pp line 180

procedure outportb(

  port: Word;

  data: Byte

);

Description

Sends 1 byte of data to the specified I/O port.

Parameters:

port
the I/O port number to send data to.
data
value sent to I/O port.

Return values: None.

Errors

None.

See also

inportb

  

Read byte from I/O port

outportl

  

Write longint to I/O port

outportw

  

Write word to I/O port

Example

{ This example demonstrates the use of the outport functions.

It simply turns the PC's internal speaker on for 50 ms and off again
}
uses
        crt,
        go32;

begin
        { turn on speaker }
        outportb($61, $ff);
        { wait a little bit }
        delay(50);
        { turn it off again }
        outportb($61, $0);
end.

Documentation generated on: May 14 2021