mm-codepage-iso-8859-list

mm-codepage-iso-8859-list is a variable defined in `mm-util.el'.
Its value is

(1250 (1252 . 1) (1254 . 9) (1255 . 8))

Documentation:
A list of Windows codepage numbers and iso-8859 charset numbers.

If an element is a number corresponding to a supported windows
codepage, appropriate entries to `mm-charset-synonym-alist' are
added by `mm-setup-codepage-iso-8859'. An element may also be a
cons cell where the car is a codepage number and the cdr is the
corresponding number of an iso-8859 charset.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 22.1 of Emacs.