Document:

<PAGE>

                                                                     EXHIBIT 4.1

                      [LOGO OF CENTILLIUM COMMUNICATIONS]
NUMBER                                                               SHARES
CTL
                                 COMMON STOCK
                         INCORPORATED UNDER THE LAWS
                           OF THE STATE OF DELAWARE

  THIS CERTIFICATE IS TRANSFERABLE                    CUSIP 152319 10 9
IN NEW YORK, NY AND RIDGEFIELD PARK, NJ     SEE REVERSE FOR CERTAIN DEFINITIONS

  THIS IS TO CERTIFY THAT

  is the owner of

    fully paid and non-assessable shares, $.001 par value, of COMMON STOCK, of

========================CENTILLIUM COMMUNICATIONS, INC.========================

(hereinafter called the "Corporation"), transferable on the books of the
Corporation in person, or by duly authorized attorney, upon surrender of this
certificate properly endorsed. This certificate is not valid until countersigned
by the Transfer Agent and registered by a Registrar.
    WITNESS the facsimile seal of the Corporation and the facsimile signatures
of its duly authorized officers.

Dated:

             [CORPORATE SEAL OF CENTILLIUM COMMUNICATIONS, INC.]

/s/ Arthur Schneiderman                                 /s/ Faraj Aalaei
SECRETARY                                             CHIEF EXECUTIVE OFFICER

                                                COUNTERSIGNED AND REGISTERED:
                                     CHASEMELLON SHAREHOLDER SERVICES, L.L.C.

                                                               TRANSFER AGENT
                                                                AND REGISTRAR
                                                     BY
                                                         AUTHORIZED SIGNATURE

<PAGE>

                           [REVERSE OF CERTIFICATE]

                        CENTILLIUM COMMUNICATIONS, INC.

The following abbreviations, when used in the inscription on the face of this
certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<CAPTION>

<S>       <C>                                       <C>
TEN COM - as tenants in common                         UNIF GIFT MIN ACT - _______Custodian_____________
TEN ENT - as tenants by the entireties                                     (Cust)             (Minor)
JT TEN  - as joint tenants with right                                       under Uniform Gifts to Minors
          of survivorship and not as tenants                                Act________________
          in common                                                                (State)

</TABLE>

    Additional abbreviations may also be used though not in the above list.

     For value received, _____________ hereby sell, assign and transfer unto

_______________________________________

PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE
_______________________________________

__________________________________________________________________________
(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

_____________________________________________________________________________

_____________________________________________________________________________

____________________________________________________________________ Shares
of the capital stock represented by the within Certificate, and
do hereby irrevocably constitute and appoint

____________________________________________________________________Attorney
to transfer the said stock on the books of the within named Corporation with
full power of substitution in the premises.

Dated_______________________________

                               ________________________________________________
                        NOTICE: THE SIGNATURE(S) TO THIS ASSIGNMENT MUST
                                CORRESPOND WITH THE NAME AS WRITTEN UPON THE
                                FACE OF THE CERTIFICATE IN EVERY PARTICULAR,
                                WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE
                                WHATEVER.

Signature Guaranteed:

By_____________________________________________
THE SIGNATURE(S) MUST BE GUARANTEED BY AN
ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCK-
BROKERS, SAVINGS AND LOAN ASSOCIATIONS AND
CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED
SIGNATURE GUARANTEE MEDALLION PROGRAM). PURSUANT
TO S.E.C. RULE 17Ad-15.FILED #C8151-2000
  MAY 22 2000
IN THE OFFICE OF
/S/ DEAN HELLER
DEAN HELLER, SECRETARY OF STATE

                                   CERTIFICATE

                                       OF

                            AMENDMENT AND RESTATEMENT

                                       OF

                            ARTICLES OF INCORPORATION

                                       OF

                       CASINOVATIONS OPERATING CORPORATION

         The undersigned hereby certify:

         1. That they are the President and Secretary of Casinovations Operating
Corporation, a Nevada corporation (the "Corporation").

         2. That the Corporation's Board of Directors, by duly adopted
resolution, approved the amendment and restatement of the Corporation's Articles
of Incorporation, as set forth herein, by unanimous written consent, and
recommended that such proposal to amend and restate the Corporation's Articles
of Incorporation be submitted to the Corporation's sole stockholder for
approval.

         3. That the Corporation's sole stockholder, by duly adopted resolution,
approved the proposed amendment and restatement to the Corporation's Articles of
Incorporation, as set forth herein, by written consent of the sole stockholder.

4. That only Article I of the Corporation's Articles of Incorporation will be
amended, reflecting that the Corporation's name will be changed from
"Casinovations Operating Corporation" to "Casinovations, Inc.".

         5. That the Corporation's Articles of Incorporation shall hereby be
amended and restated to read in its entirety as follows:

<PAGE>

                              AMENDED AND RESTATED

                            ARTICLES OF INCORPORATION

                                       OF

                               CASINOVATIONS, INC.

                              A NEVADA CORPORATION

         I, THE UNDERSIGNED, being the original incorporator herein named, for
the purpose of forming a corporation under Chapter 78 of the Nevada Revised
Statutes (the "NRS"), to do business both within and without the State of
Nevada, do make and file these Articles of Incorporation hereby declaring and
certifying that the facts herein stated are true:

                                    ARTICLE I
                                      NAME
                                      ----

         The name of the corporation is Casinovations, Inc. (the "Corporation").

                                   ARTICLE II
                      RESIDENT AGENT AND REGISTERED OFFICE
                      ------------------------------------

         The name and address of the Corporation's resident agent for service of
process is Stacie L. Brown, 6830 Spencer Street, Las Vegas, Nevada 89119.

                                   ARTICLE III
                                     PURPOSE
                                     -------

         The purpose of the Corporation is to engage in any lawful act or
activity for which corporations may be organized under the NRS.

                                   ARTICLE IV
                                 SHARES OF STOCK
                                 ---------------

         SECTION 4.1. CAPITAL STOCK. The Corporation is authorized to issue one
thousand (1,000) shares of $.001 par value common stock ("Common Stock"), which
may be issued for such consideration as may be fixed from time to time by the
Board of Directors. The shares of authorized Common Stock of the Corporation
shall be identical in all respects and shall have equal rights and privileges.

         SECTION 4.2. VOTING POWER FOR HOLDERS OF COMMON STOCK. Except as
otherwise provided in these Articles of Incorporation, each holder of Common
Stock shall be entitled to one vote for each share of Common Stock held by him
or her on all matters submitted to stockholders for a vote.

                                      -1-
<PAGE>

                                    ARTICLE V
                                    DIRECTORS
                                    ---------

         The business and affairs of the Corporation shall be managed by or
under the direction of the Board of Directors, which initially shall consist of
six (6) directors. Provided that the Corporation has at least one director, the
number of directors may at any time or times be increased or decreased as
provided in the bylaws. The names, addresses and categories of the initial
members of the Board of Directors are as follows:

                     NAME                                     ADDRESS
                     ----                                     -------

                 Jill Bayless                          6830 Spencer Street
                                                       Las Vegas, Nevada 89119
                 Steven J. Blad                        6830 Spencer Street
                                                       Las Vegas, Nevada 89119
                 Richard Jaslow                        6830 Spencer Street
                                                       Las Vegas, Nevada 89119
                 Ronald O. Keil                        6830 Spencer Street
                                                       Las Vegas, Nevada 89119
                 Jamie McKee                           6830 Spencer Street
                                                       Las Vegas, Nevada 89119
                 Bob L. Smith                          6830 Spencer Street
                                                       Las Vegas, Nevada 89119

                                   ARTICLE VI
                                     BYLAWS
                                     ------

         The Board of Directors shall have power to make, alter, amend and
repeal the bylaws of the Corporation. Any bylaws made by the Board of Directors
under the powers conferred hereby may be altered, amended or repealed by a
majority vote of the entire Board of Directors or by a two-thirds vote of all of
the stock issued and outstanding at any annual or special meeting of
stockholders, provided that notice of intention to amend shall have been
contained in the notice for such meeting.

                                   ARTICLE VII
                                  INCORPORATOR
                                  ------------

         The name and address of the incorporator of the Corporation is Stacie
L. Brown, 6830 Spencer Street, Las Vegas, NV 89119.

                                  ARTICLE VIII
                       DIRECTORS' AND OFFICERS' LIABILITY
                       ----------------------------------

         A director or officer of the Corporation shall not be personally liable
to this Corporation or its stockholders for damages for breach of fiduciary duty
as a director or officer, but this Article shall not eliminate or limit the
liability of a director or officer for (i) acts or omissions which involve
intentional misconduct, fraud or a knowing violation of law or (ii) the unlawful
payment of distributions. Any repeal or modification of this article by the
stockholders of the Corporation shall be prospective only, and shall not
adversely affect any limitation on the personal liability of a director or
officer of the Corporation for acts or omissions prior to such repeal or
modification.

                                      -2-
<PAGE>

                                   ARTICLE IX
                                    INDEMNITY
                                    ---------

         Every person who was or is a party to, or is threatened to be made a
party to, or is involved in any action, suit or proceeding, whether civil,
criminal, administrative or investigative, by reason of the fact that he, or a
person of whom he is the legal representative, is or was a director or officer
of the Corporation, or is or was serving at the request of the Corporation as a
director or officer of another corporation, or as its representative in a
partnership, joint venture trust or other enterprise, shall be indemnified and
held harmless to the fullest extent legally permissible under the laws of the
State of Nevada from time to time against all expenses, liability and loss
(including attorneys' fees, judgments, fines and amounts paid or to be paid in
settlement) reasonably incurred or suffered by him in connection therewith. Such
right of indemnification shall be a contract right which may be enforced in any
manner desired by such person. The expenses of directors and officers incurred
in defending a civil or criminal action, suit or proceeding must be paid by the
Corporation as they are incurred and in advance of the final disposition of the
action suit or proceeding, upon receipt of an undertaking by or on behalf of the
director or officer to repay the amount if it is ultimately determined by a
court of competent jurisdiction that he is not entitled to be indemnified by the
Corporation. Such right of indemnification shall not be exclusive of any other
right which such directors, officers or representatives may have or hereafter
acquire, and, without limiting the generality of such statement, they shall be
entitled to their respective rights of indemnification under any bylaw,
agreement, vote of stockholders, provision of law, or otherwise, as well as
their rights under this Article.

         Without limiting the application of the foregoing, the Board of
Directors may adopt Bylaws from time to time with respect to indemnification, to
provide at all times the fullest indemnification permitted under the laws of the
State of Nevada, and may cause the Corporation to purchase and maintain
insurance on behalf of any person who is or was a director or officer of the
Corporation, or is or was serving at the request of the Corporation as a
director or officer of another corporation, or as its representative in a
partnership, joint venture, trust or other enterprise against any liability
asserted against such person and incurred in any such capacity or arising out of
such status, whether or not the Corporation would have the power to indemnify
such person. The indemnification provided in this Article shall continue as to a
person who has ceased to be a director, officer, employee, or agent, and shall
inure to the benefit of the heirs, executors and administrators of such person.

                                    ARTICLE X
                            GAMING REGULATORY MATTERS
                            -------------------------

         If the Nevada Gaming Commission or the governing gaming regulatory
agency of a jurisdiction in which the Corporation holds a privileged license
(collectively "Gaming Regulatory Authorities") at any time determines that a
holder of stock or other security of this Corporation is unsuitable to hold such
stock or other security, then, until such stock or security is no longer owned
by such person, (a) the Corporation shall not be required or permitted to pay
any dividend or interest with respect to the stock or security, (b) the holder
of such stock or security shall not be entitled to vote on any matter as the
holder of such stock or security, and such stock or security shall not, for any
purpose whatsoever, be included in the stock or security of the Corporation
entitled to vote, and (c) the Corporation shall not pay any remuneration in any
form to the holder of such stock or security.

                                       --
<PAGE>

         If the Gaming Regulatory Authorities determine that a holder of stock
or other security of this Corporation is unsuitable, such holder shall, upon
written demand of the Corporation, relinquish ownership of such stock or
security and, if the Corporation determines it to be necessary, the Corporation
may purchase such stock or security for cash at fair market value to be
determined at the sole discretion of the Corporation.

         IN WITNESS WHEREOF, we have hereunto set our hands this 19th day of May
2000, hereby declaring and certifying that the facts stated hereinabove are
true.

                                    /s/ Steven J. Blad
                                    -------------------------------------
                                    Steven J. Blad, President

                                    /s/ Stacie L. Brown
                                    -------------------------------------
                                    Stacie L. Brown, Secretary

                                      -4-

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