Understanding the Installation A-3
Interrupt Request (IRQ) Lines
An IRQ line is a signal line that a device uses to notify your computer’s
central processor that it wants to send or receive data for processing.
Direct Memory Access (DMA) Channels
A DMA channel is a data channel that a device uses to transfer data
directly to and from the system memory. Your card’s audio interface
transfers data through the Low and High DMA channels.
Understanding the Environment Variables
Environment variables are used to pass hardware configuration
information to software in your system. This section explains the
environment variables of your audio card:
❑ SOUND Environment Variable
❑ BLASTER Environment Variable
(only DOS applications use this)
❑ MIDI Environment Variable
(applicable only in DOS for the PLAY utility)
Table A-2: Possible default IRQ line assignments for audio card devices.
IRQ Line Device
5 Audio interface
11 IDE interface
Table A-3: Possible default DMA channel assignments for audio card devices.
DMA Channel Usage
1 Audio Low DMA channel
5 Audio High DMA channel
This manual downloaded from http://www.manualowl.com
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