## Input/Output Device Driver Reference

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### Overview

The keyboard Functional Verification Tests (FVTs) exercise the Inter-Device -Driver Communication (IDC)interfaces defined for the keyboard device drivers. The tests are implemented with the Device Driver Test Tool (DDTT) and a test device driver (TEST KBD.SYS). Each test is defined in a script file and these files can be modified using a text editor to create additional, specialized test cases. The test scripts give the user a repeatable set of tests that demonstrate keyboard function and performance. Errors are reported and isolated to a specific test sequence and API.

User input and output from each keyboard test is performed by way of a separate Presentation Manager window. Test cases log all information to a log files, clearly indicating the actual execution sequence in the event of errors.