lockedout from wordpress due to incorrect URL rewrite

Hello – on the main page of the system settings in WordPress 2.8.4 I managed to type an incorrect URL (port 808 instead of port 80) where you type the address for the blog and website.

Thus I am ofcourse locked out of WordPress and cannot set it back. I tried turning off mod_rewrite in apache but that did not help.
Also noticed that the wp_config.php does not contain any such settings, so I guess it’s buried deep within MySQL somewhere.

Can someone please point me towards a way to reset this, so that I can get access to both my site and especially the admin panel again? Thanks!