OUT

• Source: https://www.freebasic.net/wiki/wikka.php?wakka=KeyPgOut
• Last revised: 2016-02-10

---

Outputs a value to a hardware port.

Syntax

` declare function Out ( byval port as ushort , byval data as ubyte ) as long

`

Usage

` Out port,value

`

Parameters

port

Hardware port to write to.

data

Data value to write.

Description

This function sends value to port and returns immediately.

Examples

start GeSHi

'speakersound.bas
Sub Sound(ByVal freq As UInteger, dur As UInteger)
  Dim t As Double,f1 As Unsigned Short
    f1 = 1193181 \ freq
    Out &h61,Inp(&h61) Or 3
    Out &h43,&hb6
    Out &h42,LoByte(f1)
    Out &h42,HiByte(f1)
    t=Timer
    While ((Timer - t) * 1000) < dur
      Sleep 0,1
    Wend
    Out &h61,Inp(&h61) And &hfc
End Sub

Sound(523, 60)  'C5
Sound(587, 60)  'D5
Sound(659, 60)  'E5
Sound(698, 60)  'F5
Sound(784, 60)  'G5
Sound(880, 60)  'A5
Sound(988, 60)  'B5
Sound(1046, 60) 'C6

end GeSHi

Platform Differences

• In the Windows and Linux versions three port numbers (&H3C7, &H3C8, &H3C9) are hooked by the graphics library when a graphics mode is in use to emulate QB's VGA palette handling. This use is deprecated; use Palette to retrieve and set palette colors.

• Using true port access in the Windows version requires the program to install a device driver for the present session. For that reason, Windows executables using hardware port access should be run with administrator permits each time the computer is restarted. Further runs don't require admin rights as they just use the already installed driver. The driver is only 3K in size and is embedded in the executable.

See also

• Inp
• Wait
• Palette

Back to DocToc