INT 33 - MS MOUSE v5.0+ - DEFINE DOUBLE-SPEED THRESHOLD                         
	AX = 0013h
	DX = threshold speed in mickeys/second, 0000h = default of 64/second
Note:	if speed exceeds threshold, the cursor's on-screen motion is doubled
SeeAlso: AX=000Fh,AX=001Bh,AX=002Ch