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▀ This function may be called after any other Int 21H function call that re-
  turned an error status, in order to obtain more detailed information about
  the error type and the recommended action. If the previous Int 21H func-
  tion call had no error, 0000H is returned in register AX. This function
  may also be called during the execution of a critical-error (Int 24H)
  handler.
 
▀ The contents of registers CL, DX, SI, DI, BP, DS, and ES are destroyed
  by this function.
 
▀ Note that extended error codes 13H-1FH (19-31) and 22H (34) correspond
  exactly to the error codes 0-0CH (0-12) and 0FH (15) returned by Int 24H.
 
▀ You should not code your programs to recognize only specific error num-
  bers if you want to ensure upward compatibility, because new error codes
  are added in each new version of MS-DOS.
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