collapseos/blk/368

: MOVEW ( src dst u -- )
    ( u ) 0 DO
        SWAP DUP I 1 LSHIFT + A@   ( dst src x )
        ROT TUCK I 1 LSHIFT +      ( src dst x dst )
        A!                         ( src dst )
    LOOP 2DROP ;
: PREV 3 - DUP @ - ;
: [entry] ( w -- )
    C@+ ( w+1 len ) TUCK MOVE, ( len )
    ( write prev value )
    H@ CURRENT @ - ,
    C, ( write size )
    H@ CURRENT ! ;
: (entry) WORD [entry] ;
: CREATE (entry) 2 ( cellWord ) C, ;
: VARIABLE CREATE 2 ALLOT ;