VIAUDD.SYS
| Product Support | |
|---|---|
| OS/2 1.3 | |
| OS/2 2.0 | |
| OS/2 2.1 | |
| OS/2 2.11 SMP | |
| OS/2 Warp 3 | |
| OS/2 Warp Connect | |
| OS/2 Warp 4 | S |
| OS/2 Warp Server for e-Business | S |
VIA audio sound system driver for the VIA Southbridge with built in AC97 Controller.
DEVICE=\MMOS2\VIAUDD.SYS
- NOTE
- There are different drivers with the same name available. Please consult the readme delivered with the driver.
Parameter
- /N: - Symbolic device name for binding with MMPM/2. This is automatically selected by MINSTALL.EXE. Defaults to VIAUD1$".
- /NO_IRQ_SHARING - Disable the IRQ sharing mode. Normally, VIAUDD.SYS automatically detects whether IRQ sharing is needed and performs the necessary setup.
- /!OEM - Prevent any special setup for AC'97 codec ICs. This parameter disables any vendor-specific setup done by the driver.
- /ALC|/!ALC - Override ALC-201A detection. Normally the driver detects the presence of ALC-201A automatically and performs the necessary setup; however, the presence of codec may be forced using /ALC or disabled with /!ALC (/!ALC is a synonym for /!OEM).
- /LFREQ|/AFREQ /LFREQ, which is the default for chip revisions >=0x30, uses a modified frequency algorithm known from VIA drivers for Linux. /AFREQ, default for the older revisions, uses the officially documented algorithm known from ALSA driver. Use /LFREQ if the sound plays too slowly; use /AFREQ if the sound plays too fast or with interruptions.
- /VERBOSE - Verbose output, useful for troubleshooting or finding out the capabilities of a specific AC'97 solution. Shows if any step during initialization fails and makes a pause to let the user examine the results.
- /QUIET - Quiet initialization - display no messages at all.
- /R: - Configure Audio Codec '97 registers manually. This is intended for advanced users, as the IOCTL90 mixer interface should be usually enough for customization. The format of is: =,,... or ..=value,...
Refer to AC'97 specification for a list of register values and their meanings.
Practical examples
- Enable the +20 dB microphone gain: /R:0E=40
- Enable simulated stereo (if supported): /R:20=4000
- Enable bass boost (if supported): /R:20=1000