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Braze Technologies |
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Innovative solutions for the "classic" arcade collector
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| Zaxxon High Score Save Kit --
Installation Guide |
Step 0: 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 may not be 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 1: Locate the CPU boardZaxxon boardset consists of two boards
(video and CPU). The CPU board is the top board and has the large heat sink in
the corner near the edge connector.
Zaxxon CPU board
Step 2: Remove the Z80-CPU chipLocate and remove the Z80-CPU chip on
the CPU board. Use the images below to assist in locating it. See Z80 Chip
Identification for additional information. The Z80-CPU chip is a 40 pin
(large) chip, located at U24. Do not get this chip confused with the 8255
sound controller located next to the Z80-CPU at U23. Remove the chip gently by
using a flat head screwdriver to pry it out of its socket from each end. 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.
Zaxxon Z80-CPU location (U24)
Step 3: Insert the Z80-CPU into the daughter cardInsert the just
removed Z80-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 Z80-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 may be a small
sticker on the daughter card marking pin-1.
Pin-1 Identification
Click images for a larger
view |
Z80 CPU Chip |
High Score Daughter Card |
Pin-1 Identification |
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Step 5: Insert the daughter card into the CPU boardInsert the daughter
card back into the Z80-CPU socket on the CPU board where the Z80-CPU chip was
originally removed from. Again, make sure pin-1 of the Z80/daughter card is
oriented to correctly match pin-1 on the CPU board. Use the photos as a guide.
The header on the daughter board has pins that are more heavy duty than the
original Z80-CPU pins, thus you will need to press very firmly to get the
daughter card to be fully inserted into the original Z80-CPU socket.
Zaxxon with HS kit installed
Step 6: Double check your workReview the steps and double check that
Z80-CPU is properly installed into the daughter card with no bent pins and that
it is correctly oriented for pin-1. (Pin-1 should be on the edge closest to the
edge of the PCB). Also check that the daughter card is also installed snug into
the Z80-CPU socket at U24 with pin-1 matched up.
Step 7: Powerup and game and enjoy!Reinstall your board into the
cabinet if necessary, 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.
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