INT 21,59 - Get Extended Error Information (DOS 3.0+)


	AH = 59h
	BX = 00 for versions  3.0, 3.1, 3.2


	on return:
	AX = extended error code (see DOS ERROR CODES)
	   = 0 if no error
	BH = error class
	BL = suggested action
	CH = locus


	- may be called after any  INT 21  function or from
	  INT 24 when an error is returned
	- must be called immediately after the error occurs
	- registers CX, DX, DI, SI, BP, DS and ES are destroyed