Understanding the Environment Variables: Sound Blaster Live! Value Sound Card User's Guide

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Understanding the Environment Variables: Sound Blaster Live! Value Sound Card User's Guide

OverviewCTSYN Environment VariableBLASTER Environment Variable

Overview

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.

BLASTER Environment Variable

The BLASTER environment variable specifies the base I/O address, IRQ line, and DMA channels of the SB interface. Its syntax is:

BLASTER=A220 I5 D1 H5 P330 T6

The parameters in the command are as follows.

This

 

Parameter

Specifies

Axxx

SB interface’s base I/O address.

Ix

IRQ line used by the audio interface.

Dx

First DMA channel used by the audio interface.

Hx

Second DMA channel used by the audio interface.

Pxxx

MPU-401 UART interface’s base I/O address.

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HP 8770c (US/CAN), 6619 (AP) Overview, Ctsyn Environment Variable, Blaster Environment Variable, This Parameter Specifies

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