Out

FreeBASIC

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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.