INT 1A - SNAP.EXE 3.2+ - "SNAP_SETANCHOR"
	AX = 7002h
	STACK:	WORD	anchor number (0000h-0009h)
		WORD	new value for the anchor
Return: AX = status
	    0000h successful
	    FFFFh failed (top word on stack not in range 00h-09h)
	STACK unchanged
SeeAlso: AX=7101h