DOS Fn 54H: Get DOS Verify State

                                                         Compatibility: 2.0+ 
 Expects: AH    54H
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 Returns: AL    current state: 00H is OFF
                               01H is ON
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    Info: Returns the current DOS disk write verification state.  If AL
          returns as 01H, then DOS will check the CRC of each sector that
          it writes, verifying that data was written correctly.

   Notes: ■ Programs can use Fn 2eH to set or reset the verification state.
          ■ The DOS Verify command can be used to change the state.

See Also: System Information Functions
          DOS Functions
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