128bit cell, 4bit types, 60bit indexes
  cons
    4   type
    60  car index
    4   pad (u could place cdr coding bits here)
    60  cdr index

  vector (string = same, exept all data must be chars)
    4   type
    12  capacity power of 2 (2^x elemnts available before must grow)
    48  size (elements used)
    4   pad
    60  array data index (how 2 grow? posibly c++ vector style)

  symbol
    4   type
    12  pad
    48  name array length
    4   pad
    60  name array index (points to array (simply contiguous memory cells) of chars, also used for comparing symbols)

  boolean
    4   type
    60  pad
    63  pad
    1   value

  fixint (+-/* implemented in machine, rest in lisp layer)
    4   type
    59  pad
    1   exact
    64  n

  fixpt (+-/* implemented in machine, rest in lisp layer)
    4   type
    59  pad
    1   exact
    32  integer
    32  fraction

  bignum (all ops implemented in lisp layer, use car/cdr ops for accesing these lists)
    4   type
    60  integer list index
    1   exact
    3   pad
    60  fraction list index

  char
    4   type
    60  pad
    64  char code

  procedure
    4   type
    60  pad (imfo about # of args etc?)
    4   pad
    60  start of code index

  port
    4   type
    60  pad (likely put stuff here)
    64  fd (or watever)