Compatibility: 2.0+
Expects: AH    2fH
Returns: ES:BX address of the start of the current DTA
Info: Returns the address of the start of the Disk Transfer Address.

Since the DTA is a global value for any process, in recursive
procedures (as when traversing a directory tree), you may need
to use this procedure to save the DTA, then set it back via fn
1aH (set DTA).

You should also use this when saving the state of the system
before popping up as a TSR.

See Also: Fn 1aH (set DTA)
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DOS Fn 2fH: Query Disk Transfer Address (DTA)