JOINT FILING AGREEMENT

                             JOINT FILING AGREEMENT

      Each of the undersigned hereby agrees that the Schedule 13G filed on the
date hereof has been filed on behalf of each of the undersigned.

Dated:   February 19, 1998


CROWN-XXXXX ASSOCIATES, LIMITED                        /s/ Xxxx X. Xxxxx, Xx.
PARTNERSHIP                                            -------------------------
By Crown-Xxxxx Partners, L.P. as                           Xxxx X. Xxxxx, Xx.
         General Partner

                                                       /s/ Xxxxxx Xxxxxxx
                                                       -------------------------
                                                           Xxxxxx Xxxxxxx


CROWN ASSOCIATES III, LIMITED                          /s/ Xxxxx Xxxxxxxxx
PARTNERSHIP                                            -------------------------
By Crown Partners III, L.P. as                             Xxxxx Xxxxxxxxx
         General Partner

                                                       /s/ Xxxxx X. Xxxxxx
                                                       -------------------------
                                                           Xxxxx X. Xxxxxx


CROWN PARTNERS III, L.P.                               /s/ Xxxxxxx X. Xxxxx
                                                       -------------------------
                                                           Xxxxxxx X. Xxxxx
CROWN-XXXXX PARTNERS, L.P.

                                                       /s/ Xxxxxxx X. Xxxxxx    
                                                       -------------------------
                                                           Xxxxxxx X. Xxxxxx

By /s/ Xxxxx X. Xxxxxx
   --------------------------                          /s/ Xxxxxxxx X. XxXxxxxx 
         General Partner                               -------------------------
                                                           Xxxxxxxx X. XxXxxxxx


THE CROWN TRUST


CROWN CAPITAL MANAGEMENT LTD


CROWN-XXXXX ADVISORS, LTD.


By /s/ Xxxxx X. Xxxxxx
   --------------------------

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