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Braze Technologies
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Innovative solutions
for the "classic" arcade collector |
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| Asteroids High Score Save Kit
-- Installation Guide |
Step 0: Make sure your game is fully working
Before installing this kit, make sure your Asteroids game is fully functional. This
kit can only work in a fully functional game. This is also a good time to check
to see what revision of asteroids the game is (Rev1 or Rev2).
How to check revision
level. This kit is only compatible with Rev2 vector roms. If you game is Rev1
you will need to install a replacement Rev2 vector rom (provided). See step 6 for
vector rom instructions.
Step 1: Turn off power to the game
While it may be possible to install this kit without removing your board from its
cabinet, you may find it easier to install the kit if you do remove the board. In
that case, pay careful attention (or label), any wire connections as you disconnect
your board so that you can correctly rehookup the game PCB afterwards. Take note
of which side of the PCB edge connector is facing the parts side of the board and
which side faces the solder side, This connector is typically not keyed and can
be inadvertently plugged in backwards - ouch! It is recommended that you label the
connector faces with something like "parts side" or "solder side".
Step 2: Locate and remove the game PCB
For Asteroids upright, the game PCB is usually attached to the left side of the
cabinet (as viewed from the front). The board may have a screw attaching the boardset
to the side of the cabinet, which will need to be removed so that the boardset can
be removed for easy access.
Asteroids game PCB
Step 3: Remove the 6502 CPU chip
Locate and remove the 6502 CPU chip on the boardset. Use the images below to assist
in locating it. See 6502
Chip Identification for additional information. The 6502 CPU chip is a 40 pin
(large) chip, located at C3 It is the only 40 pin chip on the boardset. Remove
the chip gently by using a flat head screwdriver to pry it out of its socket from
each end. Some of the Atari boardsets have open frame sockets which do not protect
the PCB traces. Be careful not to scratch any of the PCB traces underneath the
socket. Also be careful not to bend any of the pins. If any pins do get inadvertently
bent, you will need to straighten them out before the next step. Needle nose pliers
work the best for this.
Asteroids 6502 CPU location |
6502 Close-up |
6502 CPU Removed |
Step 4: Insert the 6502 CPU into the daughter card
Remove the REV2 vector eprom from the 40 pin socket on the high score kit and set
it aside. It was inserted into the kit only for shipping purposes to insure that
none of the pins got bent. Insert the just removed 6502 CPU chip into the empty
40 pin socket on the High Score Save Kit. Make sure pin-1 is correctly oriented.
Pin-1 is marked on the 6502 CPU chip usually by some type of indentation or circle
molded into the plastic. The end of the chip with the marking, needs to match up
with the socket on the daughter card that also has a marking on the plastic. There
should also be a small sticker on the daughter card marking pin-1. If the
6502 chip is installed backwards it will cause permanent damage to the 6502 chip.
Pin-1 Identification
Click images for a larger view |
Asteroid HISAVE kit |
Kit with 6502 installed |
Pin-1 Identification |
Step 5: Insert the daughter card into the boardset
Insert the daughter card back into the 6502 CPU socket on the boardset where the
6502 CPU chip was originally removed from. Again, make sure pin-1 of the 6502/daughter
card is oriented to correctly match pin-1 on the boardset. Use the photos as a guide.
Step 6: [Optional] Replace the Vector ROM
The asteroids high score save kit is based upon the REV2 software version of the
asteroids game. This requires that the vector rom on the asteroids board also be
a REV2 vector rom. The vector rom is located at chip location N/P3 and is
a 24 pin device on the same column as the 6502 CPU. It is very well possible that
you already have a REV2 vector rom on your board in which case you should skip this
step. You can check the revision by looking at the number on the chip. REV2 vector
rom is identified by 035127.02 or by looking at the copyright notice at the
bottom of the screen while the game is running.
How to check revision
level.
A REV2 vector eprom is included as part of the kit, however it is suggested that
you only install this chip if you have a REV1 vector eprom. That is, "If it aint
broke, don't fix it".
To install the REV2 eprom, simply remove the old REV1 vector rom at chip location
N/P3 and replace it with the one provided.
Again pay close attention to the pin 1 orientation. If this chip is installed
backwards it will cause permanent damage to the chip!
Step 7: Double check your work
Review the steps and double check that 6502 CPU is properly installed into the daughter
card with no bent pins and that it is correctly oriented for pin-1. And that the
daughter card is also installed snug into the 6052 CPU socket at C3 with
pin-1 matched up. Apply the same checks to the vector rom installed at N/P3
as part of step 6. REPEAT: If any of these devices are installed backwards it
will cause permanent damage to the devices!
Step 8: Powerup and game and enjoy!
Reinstall your board into the cabinet, hookup the edge connector with the original
orientation and then powerup your game.
If the game does not come up, turn power off immediately, double check your work,
and read over the
trouble shooting section.
Easy to clear out the high scores when desired. Simply put the game into selftest
(using the cabinet selftest switch). Once in selftest mode, press (and hold) all
four of the following buttons (left, right, fire and thrust). The screen will immediately
show "ERASED" indicating the high scores have been cleared out. This is the same
procedure used by Asteroids Deluxe to reset the high score table. See
Clearing High Score
table for detailed directions.
As a side note, if you want, you can also remove the old code eproms. These are
located at the edge of the board near the 6502 CPU location. See
code eprom
picture.
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