INT 2F - DOS 3.3+ PRINT - GET PRINTER DEVICE                                    
	AX = 0106h
Return: CF set if files in print queue
	    AX = error code 0008h (queue full)
	    DS:SI -> device driver header (see #01646)
	CF clear if print queue empty
	    AX = 0000h
Desc:	determine which device, if any, PRINT is currently using for output
Notes:	undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.).	 Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated. prior to the release of MS-DOS 5.0
	this function can be used to allow a program to avoid printing to the
	  printer on which PRINT is currently performing output
SeeAlso: AX=0104h