;sep91x.asm

;[LISTING SEVEN]

;;;<change this in Listing 3 from the August, 1991 column...>
;;;     mov     dx,SC_INDEX+1   ;point to Sequence Controller Data reg
;;;                             ; (SC Index still points to Map Mask)
;;;<...to this>
        mov     dx,SC_INDEX
        mov     al,MAP_MASK
        out     dx,al           ;point SC Index reg to Map Mask
        inc     dx              ;point to SC Data reg

