MAG Disk (Apr 1990) : ThingsToRead / A1000-Upgrade.article

Upgrading the A1000
by John Palmer, for the New Orleans Commodore Klub's  newsletter,
the User Buss, March 1990 (too long, too late to be included!)
March 5, 1990
Feel free to reprint or repost as long as the above credits are retained!

Shortly after the introduction of the A2000 model Amiga, Commodore made a
trade-in offer available to A1000 owners. Many of us took Commodore up on
the offer. Those who didn't felt either an intense loyalty to their
original Amiga, or just didn't need what the 2000 offered.  In my case, it
was the latter: I felt for $1000 I could add a hard drive to my A1000; if I
spent that on the upgrade, I'd do without a hard drive that much longer! 
On the other hand, many who did upgrade bought their original machine back
as a secondary machine!  (This will not occur much with this upgrade as
Commodore is having the dealers send in the A1000 keyboards).

The Enhanced Chip Set, which should soon be released, with WorkBench 1.4
will not work on the Amiga 1000. This includes the already-released 1-meg
Enhanced Agnus. WorkBench 1.4 and the Enhanced Denise will add a non-
interlaced hi-res video mode to the Amiga's video capabilities. WorkBench
1.4 itself may not work on the A1000; certainly not all of its capabilities
will be available as KickStart 1.4 requires 512K of memory and will not fit
in the A1000's 256K KickStart WCS space.  (There have been on-line
discussions of work-arounds to squeeze KickStart 1.4 into the A1000, half
in ROM and half in RAM. This will probably not be supported by Commodore,
though).

The inability to use these new capabilities and features will drive many
A1000 owners to take advantage of Commodore's offer (aka abandon their
beloved A1000 systems).  There are alternatives that allow the best of both
worlds: access to WB1.4 and the ECS, and the use of our existing A1000
expansion devices. I hoped to give a quick comparison of these below, but
realized that a chart comparing their features would be both shorter and
easier to grasp.

Things to note that aren't in the table:

The Phoenix Board has a few extra capabilites (at extra cost):
  SCSI port hardware and software
  math coprocessor socket (68881/68882)
  hardware switch to boot from any floppy
  KickStart select switch is extra
  A2000 expansion slot socket is extra
  8-meg ram daughterboard can be put in this slot

The Phoenix Board comes with the Enhanced Agnus chip and 1 meg ram; other
chips from the original A1000 board are re-used.  The Phoenix Board
supports PAL-video versions of the A1000, apparently the Rejuvenator and
DVS-Wonder board don't. 

The DVS-Wonder board is available in kit form, and fully assembled in
several flavors at various prices. The price shown is for the assembled 1-
meg version including the Enhanced Agnus, with 1.2 and 1.3 KickStart ROM's.

The Rejuvenator information specifies compatibility with the A1000 1-meg
motherboard hardware modification.  The DVS-Wonder information does not
mention this but is probably compatible.  Check with DVS if this concerns you.

M.A.S.T. has advertised their "Infinity Machine".  It's not included here
mostly from a lack of information from them.

The Phoenix Board may suffer from difficulty in obtaining support, as it's
being developed and marketed from Australia. The other boards have the
advantage here. Prices for the Phoenix products are converted from
Australian dollars... this may change as the currency rates do. Any import
duties or fees are not included, in these prices.  

The information is accurate to the best of my knowledge; please investigate
further if you're interested in any of these. 

I've offered my services to Phoenix Microtechnologies as an installer for
their U.S. customers who don't wish to install the board themselves; other
than that I have no financial interest in any of these companies.

The addresses:

* Anyone wishing further information should contact:

Rejuvenator:
Greg Tibbs
Expert Services
5912 Centennial Circle
Florence, KY. 41042
(606) 371-9690

DVS-Wonder:
Tim Kahler
Delaware Valley Software
P.O. Box 2007
Upper Darby, PA. 19082-0507
(215) 446-9227

Phoenix Board:
Andrew Wilson
Phoenix Microtechnologies Pty. Ltd.
P. O. Box 41
Goodwood
South Australia 5034
(08) 293-8752

---------------------------------------------------------

Table comparing features of A2000 and A1000 with various upgrade  boards:
machine/board
------------->       A2000, stock A1000, Rejuvenator,DVS-Wonder, Phoenix Board
Features:

KS in ROM             Y         N (1)        Y          Y (2)       Y (3)                   
                               
Load KS from disk     N         Y            Y          N           Y (4)
                                                                   
Internal Expansion    Y         N            N          N           Y
(number of slots)     5         -            -          -           1

Video slot            Y         N            Y (5)      N           Y
(A2000 compatible)

CPU coprocessor slot  Y         N            N          N           N (6)
                                                                   
clock/calendar        Y         N            Y          Y           Y
(A2000 compatible)

Audio Filter          Y         N            N          Y           Y 
(A2000 compatible)

Bridgeboard access    Y         N            N          N           N

1-meg chip ram        Y         N            Y          Y           Y
(Enchanced Agnus)

2-meg chip ram        Y         N            Y          Y (7)       ? (8)
(future Agnus)

Hi-res non-interlace
  video mode          Y         N            Y          Y           Y
(with Enhanced Chip Set
 & WorkBench 1.4)
 
Composite video       M         C            C          C           M
Color vs Monochrome 

Compatible with:
KickStart 1.4         Y         N            Y          Y           ? (9)

WorkBench 1.4         Y         ?            Y          Y           Y

Existing A1000
expansion devices?    N         Y            Y          Y           Y

Price:              $999        -        $499.95     $399.95    $480.00 (10)          
                 (upgrade offer)
                 
Notes:
1)  Third-party and do-it-yourself versions of KickStart in  ROM or EPROM are
available.

2) Software select one of four KickStart ROMS.

3) Hardware select one of four KickStart ROMS:  standard  A500/2000 ROM, the
ROM's used in the KickStart-in-ROM upgrade, and two in  user-customised EPROMS.

4) Uses small utility program to load KickStart from disk, if  desired.

5) Subset of A2000 video slot, missing serial and parallel port  signals.

6) Internal socket for 68881 or 68882 math coprocessor available.

7) The developers of the DVS-Wonder board  list a 2-meg chip ram  version to
be available latter this year.

8) The Phoenix Board supports up to two megs of ram on its  notherboard (1 meg
standard).  It's unclear if this is or can be chip ram.

9) It is unclear if the A2000-style ROM socket is capable of  addressing 512K
for KickStart 1.4.

10) Price is $600 Australian.  Import duties may add to cost.