[Dec/29/96]

Dumped: 12/29/96

ROM image files for Zaxxon (c) Sega 1981

  Type   Image name  Size
-----------------------------
  2532   Zaxxon.1
  2564   Zaxxon.2
  2564   Zaxxon.3
  2564   Zaxxon.4
  2564   Zaxxon.5
  2564   Zaxxon.6
  2564   Zaxxon.7
  2564   Zaxxon.8
  2564   Zaxxon.9
  2564   Zaxxon.10
  2564   Zaxxon.11
  2564   Zaxxon.12
  2564   Zaxxon.13
  2716   Zaxxon.14
  2716   Zaxxon.15


[MAME]

    Zaxxon memory map (preliminary)

    0000-1fff ROM 3
    2000-3fff ROM 2
    4000-4fff ROM 1
    6000-67ff RAM 1
    6800-6fff RAM 2
    8000-83ff Video RAM
    a000-a0ff sprites

    read:
    c000      IN0
    c001      IN1
    c002      DSW0
    c003      DSW1
    c100      IN2
    see the input_ports definition below for details on the input bits

    write:
    c000      coin A enable
    c001      coin B enable
    c002      coin aux enable
    c003-c004 coin counters
    c006      flip screen
    ff3c-ff3f sound (see below)
    fff0      interrupt enable
    fff1      character color bank (not used during the game, but used in test mode)
    fff8-fff9 background playfield position (11 bits)
    fffa      background color bank (0 = standard  1 = reddish)
    fffb      background enable

    interrupts:
    VBlank triggers IRQ, handled with interrupt mode 1
    NMI enters the test mode.

    Changes:
    25 Jan 98 LBO
        * Added crude support for samples based on Frank's info. As of yet, I don't have
          a set that matches the names - I need a way to edit the .wav files I have.
          Hopefully I'll be able to create a good set shortly. I also don't know which
          sounds "loop".
    26 Jan 98 LBO
        * Fixed the sound support. I lack explosion samples and the base missile sample so
          these are untested. I'm also unsure about the background noise. It seems to have
          a variable volume so I've tried to reproduce that via just 1 sample.

    12 Mar 98 ATJ
            * For the moment replaced Brad's version of the samples with mine from the Mame/P
              release. As yet, no variable volume, but I will be combining the features from
              Brad's driver into mine ASAP.

-


[Jan/27/98]

Tips.txt

Zaxxon- playing tips

STEP 1: To battle!
Your fighter approaches Zaxxon's first asteroid base.  Fly high to avoid
crashing into the first wall!  Then swoop down to attack enemy targets.
Watch out for return fire from turrets and dodger guns.

STEP 2: Running out of fuel.
Careful!  Your fighter guzzles fuel as you zoom over Zaxxon's territory.
Keep an eye on your fuel gauge.  Fire at fuel tanks to fill up.  Then slip
over the gap in the wall at the end of the asteroid base and prepare for a
battle in space.

STEP 3: Attack in space.
You've made it past Zaxxon's first ground force.  Now try your skill against
Zaxxon's planes in space.  They can dive at you from above, below or hit you
head on.  Eliminate as many planes as you can in this sudden attack.

STEP 4: More asteroid action.
You're heading toward another asteroid.  Slip through gaps in the
barriers to avoid the deadly electronic beams.

STEP 5: Meet the robot Zaxxon.
Pass the final barrier and your fighter no longer moves forward.  A deadly
force holds it back!  But fortunately, you can still move up, down and
sideways.  Suddenly, the robot Zaxxon approaches.  Only one spot on Zaxxon
is vulnerable - the missile under its arm.  To eliminate Zaxxon, you must
shoot its missile repeatedly before it fires.  If you fail, you still have a
chance to hit the speeding missile and proceed to the next round of play.
If you don't eliminate the missile, your fighter will be eliminated.

It takes several hits to eliminate Zaxxon's missile:

STEP 6: Onward through the galaxy!
Once you've gone past the robot Zaxxon, another asteroid challenges your
skill and coordination.  Then it's back into deep space to confront another
wave of enemy fighters.

STEP 7: Starting over.
Keep defending the universe until you run out of fighters.


[Oct/29/98]

        ZAXXON   CHIP PLACEMENT
THERE IS AT LEAST THREE VERSIONS OF ZAXXON
CHIPS 1,2,3 HAVE A "D" VERSION, A "C" VERSION AND AN "A" VERSION
SOME BOARDS USE 2564 ROMS AND SOME 2764

CHIP #  POSITION  TYPE      VERS-2    VERS-3
---------------------------------------------
ZAXXON   10       2564      10
ZAXXON   11        "        11
ZAXXON   12        "        12
ZAXXON   13        "        13
ZAXXON   14       2716      14
ZAXXON   15       2716      15
ZAXXON   1D       2532      1C        1A
ZAXXON   2D       2564      2C        2A
ZAXXON   3D       2564      3C        3A
ZAXXON   4         "        4
ZAXXON   5         "        5
ZAXXON   6         "        6
ZAXXON   7         "        7
ZAXXON   8         "        8
ZAXXON   9         "        9
PROM    IC72      J218X2   (82S126)
PROM    IC98      J214A2   (82S135)
  
-
[Sep/30/2005]

Jackson (bootleg)  
  
ROMs:
1x 2732 (blank label)(1)
12x Intel D2763 (2-13)
2x HN462716 (14,15)  

NOTE:
Blister, no PCB
It's a bootleg of "Jackson", with 1 different GFX rom  
  
Dumped 29/09/2005  

-



