Using a given font for ASCII and another for unicode

Question

I would like to set up emacs so that it uses

-outline-Courier New-normal-normal-normal-mono-16-*-*-*-c-*-iso8859-1

to display ASCII characters and

-outline-Arial Unicode MS-normal-normal-normal-sans-16-*-*-*-p-*-gb2312.1980*-*

to display unicode symbols.

This is actually how it was set up by default on one of the computer I use. On another, pressing C-u C-x = on a unicode character of interest gives

        character: ↷ (8631, #o20667, #x21b7)
preferred charset: unicode (Unicode (ISO10646))
       code point: 0x21B7
           syntax: .    which means: punctuation
         category: .:Base
      buffer code: #xE2 #x86 #xB7
        file code: #xE2 #x86 #xB7 (encoded by coding system utf-8-dos)
          display: no font available

Character code properties: customize what to show
  name: CLOCKWISE TOP SEMICIRCLE ARROW
  general-category: So (Symbol, Other)

There are text properties here:
  fontified            t

which I do not fully understand but the part display: no font available is not what I would like.

How can I change that?

Answer 1

Actually the page of interest is not the one entitled Set Fonts but Font Sets (see here). I added

(set-fontset-font "fontset-default" 'unicode
              "-outline-Arial Unicode MS-normal-normal-normal-sans-*-*-*-*-p-*-gb2312.1980-0")

to my .emacs and it did the trick.