(elisp)Object Internals

[Luc Teirlinck]

Is the following quote from `(elisp)Object Internals' still
"essentially accurate"?

    Depending on the operating system and type of machine for which you
    compile Emacs, twenty-eight bits are used to address the object, and
    the remaining four bits are used for a GC mark bit and the tag that
    identifies the object's type.

I know that this is not true for integers any more, but is it still
true for most other objects?

Sincerely,

Luc.