Creative Sound Blaster Live!, Начало работы

Страница: 26 / 45

SB16 Emulation in MS-DOS/ Windows 95/98 B-3
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.
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.
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
CTSYN
environment variable points to the
location of the
CTSYN.INI
file, which usually
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.
Table B-1: Possible default input/output (I/O)
addresses.
Device
Default I/O
Address Range
SB interface 220H to 22FH
240H to 24FH
260H to 26FH
280H to 28FH
MPU-401 UART MIDI
interface 300H to 301H
310H to 311H
320H to 321H
330H to 331H
Stereo music synthesizer 388H to 38BH
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
Note: The values shown may be different
for your system. No space is allowed before
and after the equal sign. However, there
must be at least a space between parameters.