displaying octal sequences in emacs 21.3.1

[Roland Winkler]

Eli Zaretskii <eliz@is.elta.co.il> writes:

> On 2 Jul 1999, Roland Winkler wrote:
> 
> > My default setting for editing files is unibyte with
> > iso-latin-1. What should I do if in certain buffers I want
> > everything beyond 7bit asci to be displayed with the
> > corresponding octal number?
> 
> Try this:
> 
>  M-: (standard-display-default 128 255) RET

The above is from five years ago. It worked fine up to emacs 21.2.1
(as far as I can go back). Now I am using emacs 21.3.1 or CVS emacs.
What should I do to get the same result?

Thanks a lot,

Roland