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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
Overview • CTSYN Environment Variable • BLASTER Environment Variable
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
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.
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. |
| Tx |
Card type. x must be 6. |
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