CONST	MODE_640=$8000,
		PLNCNTMSK=7,
		PLNCNTSHFT=12,
		PF2PRI=$40,
		COLORON=$200,
		DBLPF=$400,
		HOLDNMODIFY=$800,
		INTERLACE=4,
		PFA_FINE_SCROLL=15,
		PFB_FINE_SCROLL_SHIFT=4,
		PF_FINE_SCROLL_MASK=15,
		DIW_HORIZ_POS=$7F,
		DIW_VRTCL_POS=$1FF,
		DIW_VRTCL_POS_SHIFT=7,
		DFTCH_MASK=$FF,
		VPOSRLOF=$8000
