Out
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.
Example
`
'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
`
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`