INT 13,17 - Set DASD Type for Format (XT BIOS from 1/10/86 & newer)

	AH = 17h
	AL = 00 no disk
	   = 01  320k/360k diskette in 320k/360k drive
	   = 02  320k/360k diskette in 1.2Mb drive
	   = 03  1.2Mb diskette in 1.2Mb drive
	   = 04  720k diskette in 720k drive  (BIOS 6/10/85 & newer)
		 720K diskette in 1.44Mb drive (PS/2)
		 1.44Mb diskette in 1.44Mb drive (PS/2)
	DL = drive number (0=A:, 1=2nd floppy, 80h=drive 0, 81h=drive 1)


	returns nothing


	- only the disk number is checked for validity
	- tells BIOS format routine about the disk type