public @dtbl
	extrn sd0,sd1,sd2,sd3
        extrn sd4,sd5,sd6,sd7
	extrn cf0,cf1,cf2,cf3

        cseg

@dtbl	dw sd0,sd1,sd2,sd3	; drives A-D
        dw sd4,sd5,sd6,sd7      ; drives E-H
	dw cf0,cf1,cf2,cf3	; drives I-L
	dw 0,0,0,0		; drives M-P

        end