Audioport


Installation Information


The installation program for the Audioport will make the following changes to your system files.

The changes to your SYSTEM.INI file are as follows.

[386enh]
device=sb2ap.386

The next set of changes are optional and can be changed if you wish to alter the default operation of the driver. Certain assumptions are made about how much work the driver must do. You, the end user, can control what work will be done. At the bottom of SYSTEM.INI, a section named, "[mvaport.drv]", can be added to control the drivers' operation. Here is an example of the [mvaport.drv] section with default conditions:

[mvaport.drv]
aport=0378h
sbaddr=0220h
fmaddr=0388h
exitreset=0
dtime=25
wtime=15

The six lines following "[mvaport.drv]" tell the driver how to configure itself.

APORT=Assigns a base parallel port address to eliminate any search.

SBADDR= Sound Blaster base address is 220h.

FMADDR=Adlib FM virtualization is always enabled unless you enter a zero on this line. If you have a Thunder Board, PAS, Sound Blaster/Pro in your system, you should enter a 0 here. These cards provide AdLib compatibility, so this function is not needed.

EXITRESET= The driver does not reset the Audioport when Windows exits. The reset can be forced by entering a 1 on this line.

DTIME=xx is a timer value to generate a hardware interrupt every xx milliseconds, when in a DOS shell. The lower the number, the more interrupts. This slows the machine down, but makes digital audio clearer. This value should be between 10 and 60.

WTIME=xx is a timer value to generate a hardware interrupt every xx milliseconds when running Windows programs. The lower the number, the more interrupts. This slows the machine down, but makes digital audio clearer. This value should be between 10 and 60.

PTRAP=xx enables/disables the printer virtualization. Windows 3.1 has eliminated the printer virtualization. With VAPD.386, you can select whether to disable these services. A "ptrap=0" disables, and "ptrap=1", the default, enables printer virtual services.

Once these changes have been made, save the file, and exit to DOS. Copy the file "SB2AP.386" to the WINDOWS\SYSTEM sub-directory, and re-start Windows.


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