Int 2F Fn 1206  U - DOS 3+ Internal - Invoke Critical Error                [D]

   AX = 1206h
   DI = error code
   BP:SI -> device driver header
   SS = DOS DS (must be using a DOS internal stack)
   STACK: WORD value to be passed to INT 24 in AX

Return: AL = 0-3 for Abort, Retry, Ignore, Fail
   STACK unchanged

See Also: INT 24