||Innovative solutions for the "classic" arcade collector
|Asteroids High Score Save Kit --
Installation Guide |
Step 0: Make sure your game is fully workingBefore 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 gameWhile 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 inadvertantly
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 PCBFor 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
Asteroids game PCB
Step 3: Remove the 6502 CPU chipLocate and remove the 6502 CPU chip on
the boardset. Use the images below to assist in locating it. 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 inadvertantly 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 CPU Removed
Step 4: Insert the 6502 CPU into the daughter cardRemove 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.
Click images for a larger
Asteroids High Score Save kit
Kit with 6502
Step 5: Insert the daughter card into the boardsetInsert 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 ROMThe 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
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 workReview 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
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