Input/Output (I/O) Addresses; Interrupt Request (Irq) Line; Direct Memory Access (Dma) Channel; Understanding The Environment Variables - Creative Blaster User Manual

Input/Output (I/O)
Addresses
I/O addresses are communication areas used
by your computer's central processor to
distinguish among various peripheral devices
connected to your system when sending or
receiving data.
Table B-1: Possible default input/output (I/O)
addresses.
Device
SB interface
MPU-401 UART MIDI
interface
Stereo music synthesizer 388H to 38BH

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.
Table B-2: Possible default interrupt request (IRQ) line
assignment.
Device
SB interface
Default I/O
Address Range
220H to 22FH
240H to 24FH
260H to 26FH
280H to 28FH
300H to 301H
310H to 311H
320H to 321H
330H to 331H
Default IRQ Line
5, 7, 9, 10
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.
Table B-3: Possible default direct memory access
(DMA) channel assignment.
Usage
First DMA channel
Second DMA channel
Understanding the
Environment Variables
Environment variables are used to pass
hardware configuration information to the
software in your system. For MS-DOS, your
audio card includes the following:

CTSYN Environment Variable

BLASTER Environment Variable
CTSYN Environment
Variable
The environment variable points to the
CTSYN
location of the
CTSYN.INI
resides in the Windows directory. The syntax
for this variable is as follows:
CTSYN=path
where path is the location of the CTSYN.INI
file.
SB16 Emulation in MS-DOS/ Windows 95/98 B-3
Default DMA
Channel
0, 1, 3
5, 6, 7
file, which usually