B-4 SB Emulation in MS-DOS/ Windows 95/98
Interrupt Request (IRQ)
Line
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) Channel
A DMA channel is a data channel that a device uses to transfer data directly to and from the
system memory.
Stereo music synthesizer
388H to 38BH
Table B-1:
Possible default input/output (I/O) addresses.
Device
Default I/O Address Range
Table B-2:
Possible default interrupt request (IRQ) line assignment.
Device
Default IRQ Line
SB interface
5, 7, 9, 10
Table B-3:
Possible default direct memory access (DMA) channel assignment.
Usage
Default DMA Channel
First DMA channel
0, 1, 3
Second DMA channel
5, 6, 7
