OS-9 Device Descriptor and Configuration Module Reference

3SCFTMDevice Descriptors MICROWAREDescription File Modification ProceduresStep 1. Change to the SCF/ directory (see Figure 3-3).Step 2. Edit the file config.des and read the included comments for moreinformation on using the specific description files provided in yoursoftware distribution. The config.des file contains a list of macronames that can be defined to override the global default values for theconfiguration fields.Step 3. Refer to the DESCRIPTION FILE MACRO section in the field referencelater in this chapter to determine the macro name you define toconfigure the target field.Step 4. Read the comments in config.des to determine where to place thedefine for this macro.Step 5. Select the value you want to use to configure the field. See theAVAILABLE VALUES section of the field reference data for values ormacros that can be used for the definition. Define the macro by enteringa definition in the appropriate description files as follows:#define Step 6. Save the changes and rebuild the SCF device descriptors, entering thefollowing command in the SCF//DESC directory:os9makeStep 7. Rebuild your boot image to include the new descriptor.176 OS-9 Device Descriptor and Configuration Module Reference