## Storage Device Driver Reference

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### Device Driver Test Tool (DDTT)

The Device Driver Test Tool (DDTT) provides an efficient environment to create, execute, and refine device driver test cases. The DDTT is extensible by the addition of new device-dependent DLLs and grammar files. DLL files implement device-specific interface functions, such as DosDevIOCtl calls. Actual test-case content and execution is controlled by test-case script files.

Test-case script files are parsed by DDTT's generic parser. Device- specific functions resident in the DLLs are indirectly called from the test -case parser. Device-specific grammar files tell the parser which device- specific function and parameter keywords to expect in the test-case script files.