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All DDI 8 drivers must supply a Drvmap(DSP/4dsp) file for all bus types. Loadable drivers for earlier DDI versions that support autoconfiguration must also supply a Drvmap file. This provides information used by the autoconfiguration facilities. The samp driver's Drvmap(DSP/4dsp) file is shown in sample Drvmap file
The first line of this sample says that this is the sample driver (to match the Master and System files), it is autoconfigured, and it does not supply a CFG_VERIFY subfunction to the config(D2) entry point routine, which is used to verify the configuration parameters for many ISA drivers. Miscellaneous is the category that specifies this does not use a specialized interface such as MDI or SDI, and Generic is given as the brand name; most drivers will provide a brand name that represents the family of devices to which this driver belongs.
The second line of this sample specifies that this is an ISA device and specifies AT CMOS RAM as the board ID.