( Words here until the end of the low part, unlike words
  preceeding them, aren't immediately needed for boot. But its
  better to have as many words as possible in the xcomp part. )
: IMMEDIATE
    CURRENT @ 1-
    DUP C@ 128 OR SWAP C! ;
: IMMED? 1- C@ 0x80 AND ;
: +! TUCK @ + SWAP ! ;
: -^ SWAP - ;
: / /MOD NIP ;
: MOD /MOD DROP ;
: ALLOT HERE +! ;
: CREATE (entry) 11 ( 11 == cellWord ) C, ;
: VARIABLE CREATE 2 ALLOT ;
: LEAVE R> R> DROP I 1- >R >R ;