INT 2F U - DOS 4.0+ SELECT - DISPLAY FORMAT DISK PROMPT                         
	AX = ADC1h
Return:	AX destroyed???
Note:	This function is called by DOS 4.0+ FORMAT utility just as it prompts
	  for a disk to be formatted.  It is only issued when the 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.
	  /SELECT option was specified and is intercepted by SELECT displaying
	  the prompt.  However, the callout is still present in DOS 6.0 at
	  least.