Specifications

CHAPTER 3: MORE CONFIGURATION INFORMATION
QUARTUS II ENVIRONMENT VARIABLES
65 ■ ALTERA SOFTWARE INSTALLATION AND LICENSING ALTERA CORPORATION
2. Double-click the System icon in the Control Panel window.
3. Click the Advanced tab in the System Properties dialog box.
4. Click Environment Variables.
5. Select a variable from the variables list in the Environment Variables
dialog box.
6. Click Edit.
7. Type a value in the Variable value box in the Edit Variable dialog box
Quartus II General Environment
Variables
The Quartus II software installation process initializes the following
variables, but you can change them to optimize your system performance.
QUARTUS_ROOTDIR_OVERRIDE
The QUARTUS_ROOTDIR_OVERRIDE environment variable specifies the
name of the Quartus II system directory. The default directory is <home
directory> /altera <version number> (Linux) or <Quartus II system
directory>\altera\ <version number>\quartus (Windows).
If the system displays an error message indicating that Quartus II software
files cannot be found when you start the program, you should set the
QUARTUS_ROOTDIR_OVERRIDE environment variable to the name of the
Quartus II system directory.
QUARTUS_64BIT
The QUARTUS_64BIT variable specifies the 64-bit version of the Quartus II
software. To turn on 64-bit processing in the Quartus II software, set the
environment variable to 1 before running the Quartus II software. This
variable is supported only by systems with 64-bit processing.