INT 2F - WinDOS v2.11 - SEARCH FOR NON-FRAGMENTED DISK AREA                     
	AX = AF1Ah
	BL = drive (00h = current, 01h = A:, etc.)
	CX = number of clusters desired
Return: CF clear if successful
	    DI = first free cluster on logical drive
	    BP = first cluster of contiguous free area
	    AX destroyed
	CF set on error
	    AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
Desc:	attempt to find an area of the disk containing the specified number
	  of contiguous unallocated clusters
SeeAlso: AX=AF00h"WinDOS"