Document:

Exhibit 10.29

                                                                10 November 1999

Mr. Robert Boyd, Vice President
Xiox Corporation
150 Dow Street
Manchester, New Hampshire 03101

Dear Mr. Boyd,

This  letter is  intended  to lay out the  various  aspects  of our  discussions
regarding the leasing of Space #302B by Xiox Corporation  (hereinafter  referred
to as Xiox or Lessee) from One Dow Court, Inc.  (hereinafter  referred to as ODC
or Lessor.) Space #302B is the same space that was formerly  occupied by Xiox on
the 3rd floor of ODC's building at 150 Dow Street in Manchester,  New Hampshire.
The space contains approximately 10,538 square feet of space.

Fit-up

In order  for the  space to be  usable  by Xiox,  certain  items of  fit-up  are
required, as follows:

         a)    Demolition and removal of the pre-fabricated offices, with the
               walls left standing refinished as needed.

         b)    Repair of the floor tiles generally, and especially near the air
               conditioning unit located near column line #12.

         c)    Replacement of the existing carpeting with new carpeting.

         d)    Closing in all three HVAC units completely,  and providing ducted
               returns  to  reduce  the  noise  from  these  units.   Where  the
               pre-fabricated  offices are removed,  diffusers will be installed
               to the existing ductwork.

         e)    Upgrading the lighting.

         f)    Constructing a lunchroom in the northwest corner of the space.

         g)    General clean-up and painting, as needed.

         h)    Installing voice and data cabling to tie into space 521A.

Working  with  Roger  Blais  Construction,  LaFlamme  Electric  and New  England
Mechanical  Associates,  we jointly arrived at an estimated cost for these items
of $34,000  (excluding item (h.)).  Based on a guaranteed  minimum lease term of
two (2) years, as further discussed below,

                                       27
<PAGE>

ODC will contribute one third of the fit-up expense, up to $10,000,  toward this
total.  Xiox,  no later than 10 January  2000,  is to pay one half the estimated
remainder to ODC, namely $12,000, and is to pay for the balance when invoiced by
ODC or directly by the contractors.

Based on  maintaining  occupancy  for  greater  than two (2) years,  this Lessee
fit-up  contribution will be credited as follows. In months 30, 36, 42, 48, 54 &
60, credits in the amount of one sixth of the Lessee contribution for the agreed
upon work  (estimated  at $4,000 per credit,  which is the maximum  that will be
allowed) will be applied towards the monthly rent invoice.

Term and Termination

The terms and conditions of the lease will be the same as those contained in the
lease  dated 18  November  1997  (11/18/97),  as  amended  on 16  December  1997
(12/16/97),  between Xiox and ODC,  except for the following  specific terms and
conditions:

The formal date of occupancy  for this space will be 1 January  2000  (1/01/00).
This lease will  terminate on 31 January 2005  (1/31/05) in accordance  with the
lease on space 521A unless terminated earlier based on the following provisions.

         A twelve (12) month written notice will be deemed acceptable by ODC if
         received from 12/31/00 to 5/31/02. Notice submitted by Xiox prior to
         12/31/00 shall be received by ODC as of 12/31/00.

         A six (6) month written notice will be deemed acceptable by ODC if
         received from 6/30/02 onwards.

Based on  approval  from the  contractors,  Xiox will be  permitted  to occupy a
portion of the space prior to the completion of the fit-up.  Xiox agrees that it
will not  interfere  with the work in progress,  and  acknowledges  that it will
accept the normal noise, dust, paint smells, traffic, etc. of construction while
the work is in progress.

Parking

As part of the consideration for this lease, ODC agrees to provide to Xiox up to
one hundred ten parking spaces located as follows:

         forty (40) leased from the City of  Manchester  in the Myrna Lot at the
         north  end of 155 Dow  Street,  twenty  (20)  leased  from  the City of
         Manchester at metered parking spaces in the Millyard (where available,)
         and fifty (50)spaces in the new lot planned to be constructed by ODC in
         the strip of land  immediately  east of and  adjacent  to the  railroad
         tracks between Brook Street and Kidder Street.

                                       28
<PAGE>

The rent will be adjusted  downward if the actual mix of parking leased from the
City  includes  more metered  parking and fewer Myrna lot spaces.  To the extent
that Xiox  initially  requires less than one hundred ten (110) spaces,  ODC will
only lease the amount  required and will adjust the rent  equitably.  Additional
spaces will be added, as required by Xiox, in increments of ten spaces, with the
rent increased equitably.

Until 1 July 2000  (7/1/00) or the date of  availability  of the fifty spaces in
the lot adjacent to the railroad tracks,  ODC will lease spaces from the City of
Manchester in the Bedford Street lot, as required by Xiox, up to the fifty space
requirement.  In the event that the parking area adjacent to the railroad tracks
is not available as of 1 July 2000  (7/01/00),  when the Bedford lot will become
no longer  available,  ODC (a.) will pursue  additional  adjacent  street or lot
space for the  interim  period at similar  cost or (b.) will lease  space in the
Wall Street Tower parking garage, as required by Xiox up to the maximum of fifty
(50) parking  spaces,  and the  incremental  additional  cost for those  spaces,
currently  estimated  at $22.50  per space per month  over the  $22.50 per month
planned cost of the railroad parking, will be split between ODC and Xiox.

The current  rate for leasing  parking  spaces  from the City of  Manchester  is
$25.00  per space per month for the Myrna lot and $22.50 per space per month for
metered spaces. In the event that these charges are increased, ODC and Xiox will
share  equally in the  increase up to a total of $2.50 per space per month each.
All  additional  charges in excess of $5 per month for these  spaces will be the
responsibility  of Xiox.  Should ODC arrange to lease additional  spaces, at the
request of Xiox,  all charges for those  spaces  will be the  responsibility  of
Xiox.

In addition,  ODC agrees to assign three (3)  additional  spaces in front of 150
Dow Street  and five (5) spaces in the rear of 150 Dow Street for the  exclusive
use of Xiox  during  the term of this  lease.  At such time as Xiox is no longer
occupying  and/or paying rent on Space #302B,  these additional eight (8) spaces
shall no longer be assigned to Xiox.

Parking spaces  assigned based on the lease for Space # 521A shall be unaffected
by the provisions of this  agreement.  These include the ten (10) assigned spots
adjacent to the building and the unlimited use of the lot between Dow Street and
Langdon Street above Gold's Gym.

Rent

Rent for Space #302B will be $68,497 per year (or  $5,708.08  per month) for the
term of the lease  through  31  January  2005  (1/31/05).  This  amount  will be
adjusted equitably, in accordance with the terms of the above, and in accordance
with  increases or decreases  in the amount of parking  required by Xiox.  In no
circumstance  shall the annual rent  decrease  below  $42,152 (or  $3,512.67 per
month.)

If Xiox  shall  have  maintained  its  lease of Space  #302B  for the full  term
contemplated  through 31 January 2005 (1/31/05),  Xiox shall have the option, by
giving six months'  advance  notice,  no later than 31 July 2004  (7/31/04),  to
renew this lease for a seven year term  through 31 January 2012  (1/31/12).  The
rent for the  renewal  term will be based on an annual  rent of  $73,766  plus a
cost-of-living  adjustment  calculated  as is  provided  in the  lease  dated 18
November 1997 (11/18/97). If the number of parking spaces is adjusted from those
contemplated  above,  the base rent for the  renewal  term of the lease  will be
equitably adjusted accordingly.

                                       29
<PAGE>

While this additional lease remains in effect, Xiox will be responsible for 9.1%
of the increases in property taxes, heat and insurance costs, as provided in the
lease dated 18 November 1997.  Should Xiox terminate this additional lease prior
to the  expiration  of the  underlying  lease  on  space  521A,  the  percentage
responsibility shall revert to the 5.9% figure in the underlying lease.

During the term of this  agreement,  ODC shall provide Xiox with  information on
additional space becoming  available within the building through  non-renewal of
existing leases, early terminations,  or current tenant sublet desires.  Without
restricting the limitations,  terms and conditions of any such offer, ODC agrees
to offer to Xiox the entire space becoming available prior to actively marketing
the space.

By signing below,  Xiox  acknowledges  and agrees to the terms and conditions of
this  letter and agrees  that it is to be treated as an  amendment  to the lease
dated 18 November 1997 (11/18/97).

Thank you very much.

                                                     Sincerely yours,

                                                     /s/ RALPH P. SIDORE
                                                    ----------------------------
                                                     Ralph P. Sidore
                                                     Property Manager

Xiox Corporation

Acknowledged and Agreed:

    /s/   ROBERT BOYD                    11/12/99
------------------------------------------------
          Signature                         Date

          ROBERT BOYD              VP OPERATIONS
 -----------------------------------------------
          Printed Name                     Title

                                       30EXHIBIT 10.18

<PAGE>

                                                                   Exhibit 10.18

SECOND  ADDENDUM  TO LEASE DATED JULY 6, 1994,  BY AND  BETWEEN  H-K  ASSOCIATES
(LESSOR)  AND  VIDEONICS,  INC.  (LESSEE)  FOR  PREMISES  AT 1370  DELL  AVENUE,
CAMPBELL, CALIFORNIA 95008.

  Whereas Lessee desires to renew its above referenced Lease,  Lessor and Lessee
  agree to the following changes and additions for a new lease term.

  55.  PREMISES:
       Premises consist of 27,500 square feet of space.

  56.  TERM:
       The term of the Lease shall be for three (3) years,  commencing August 1,
       1999, and ending July 31, 2002.

  57.  RENT:
       Rent shall be based on a NNN Lease as per the Following:
       First  year - $1.25 per square foot per month.
       Second year - $1.30 per square foot per month.
       Third year - $1.35 per square foot per month.

 58.   RIGHT TO RENEW LEASE:
       Lessee  shall have the right to renew this Lease for two 1-year  periods.
       Lessee shall give Lessor  written notice of' its intent to renew not Less
       than 180 days prior to the  expiration  of the Lease Rent for the renewal
       shall be as follows:
       First renewal - $1.40 NNN per square foot per month.
       Second renewal - 1.45 NNN per square foot per month.

59.   SECURITY DEPOSIT:
      Lessee shall  deposit with Lessor an  additional  amount of  $27,050.00 as
      security  for  Lessee's  faithful   'performance  of  Lessee's  obligation
      hereunder. The payment of the added deposit shall be as follows:
      May 1, 1999, $7,050.00.
      September 30, 1999, $5,000.00.
      December 31, 1999, $5,000.00.
      March 31, 2000, $5,000.00.
      June 30, 2000, $5,000.00.
      This will bring Lessee's total security deposit to $37,125.00.

60.   OCCUPANCY:
      Whereas Lessee  presently  occupies the Premises,  Lessee agrees to accept
      said Premises in their present state and condition.

<PAGE>

61. CANCELLATION OPTION AND BUY OUT:

      Lessee shall have the option to cancel this Lease, provided,  Lessee gives
      Lessor a minimum of 180 days written notice prior to canceling said Lease.
      The cost to Lessee to cancel the Lease shall be as  follows:
      a. To cancel  during  the  period of months one (1)  through  twelve  (12)
         Lessee shall pay to Lessor an amount equal to three (3) months rent.

By: /s/ Neil Hamm                           By: /s/ James McNeill
    -------------                               -----------------
Date: 4/27/99                               Date: 4/27/99

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