collapseos/blk/627

: _cell! ( tilenum pos )
    2 * 0x7800 OR _ctl ( tilenum ) _data 1 _zero ;
: _lf
    XYPOS @ 0 ( blank ) OVER _cell!
    [ VDP_COLS LITN ] / 1+ [ VDP_ROWS LITN ] MOD
    [ VDP_COLS LITN ] * XYPOS !
;
: (emit)
    DUP 0x0d = IF DROP _lf EXIT THEN
    0x20 - DUP 0< IF DROP EXIT THEN
    0x5e MIN ( tilenum ) XYPOS @ _cell!
    XYPOS @ 1+ DUP [ VDP_COLS VDP_ROWS * LITN ]
    = IF DROP 0 THEN XYPOS !
;