Display all custom post types in archives.php

How would I do this?
archive.php only has this:

wp_get_archives('type=monthly');

And wp_get_archives() does not have a parameter to display all post types.

Also I think archive-[post_type].php is not the one I am looking for since I want all post types to be displayed in one archive page.

Thanks!

W

If you set up the right parameters for your custom post type using

'has_archive' => true // Will use the post type slug, ie. example
// or 
'has_archive' => 'my-example-archive' // Explicitly setting the archive slug

http://codex.wordpress.org/Function_Reference/register_post_type