Interrupt Request (Irq) Lines; Direct Memory Access (Dma) Channels; Understanding The Environment Variables - Creative AWE64 - Value Sound Card Getting Started Manual

Interrupt Request (IRQ) Lines

An IRQ line is a signal line a device uses to notify your computer's
central processor that it wants to send or receive data for processing.
Table B-2 lists an example of an IRQ line that may be assigned to the
audio interface on your audio card.
Table B-2: Possible default IRQ line assignments.
IRQ Line
5

Direct Memory Access (DMA) Channels

A DMA channel is a data channel 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.
Table B-3 shows a possible combination of DMA channels that may
be assigned to the audio interface.
Table B-3: Possible default DMA channel assignments.
DMA Channel

Understanding the Environment Variables

Environment variables are used to pass information about how your
card is configured to programs in your system. This section explains
the environment variables of your audio card:
Device
Audio interface
1 Audio Low DMA channel
5 Audio High DMA channel
SOUND Environment Variable
BLASTER Environment Variable
MIDI Environment Variable
Usage
Understanding the Installation B-3