4 Game Micro Player Galaga

Get your Micro Player from My Arcade or Amazon. For this instruction I used the Galaga version but any version will do: https://www.myarcadegaming.com/collections/mini-arcades/products/galaga-micro-player

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Step 1: Open the Case

a. Remove the 4 Phillips head screws from the back af the case (highlighted in red).

b. Use a flathead screwdriver and 2cm from the top insert between the side and the case and pry open (highlighted in red).

c. Repeat at the bottom (also 2cm from the bottom of the case).

You could also remove the large Galaga sticker that is glued to the sides, but prying it open worked just fine for me. The stickers themselves are of quite good quality and use thick paper. So you can remove them to expose the screws and glue them back. The adhesive is good enough that it can withstand 1 or 2 removals and reapplications without needing new/extra glue.

As you can see from the 3rd picture every side is tied down with 5 screws. We only need to remove/bypass the red highlighted ones. The amber highlighted ones hold down the rest of the case.

Step 2: Remove the Main Circuitboard

d. remove the 4 small Phillips head screws (highlighted in red) to get access to the main circuitboard*.

*Note: when you remove the main circuitboard the screen that is attached with a ribboncable will also come loose.

In yellow you can see the small pesky screws that tie the sides to the main case. I decided to remove all the electronics from this machine (for another project) so you can see that how the screen is attached via a ribbon-cable to circuitboard and folded over in the case itself.

Step 3: Expose the Circuitboard

e. remove the black foam from the circuit-board (highlighted in red).

The black foam is used to rest the display on when it screwed in place and of isolates this from the main circuitboard. So when reassembling make sure to re-attach the foam.

Step 4: Acces All the Other Games....

f. By shorting the IOB1, IOB2 and/or IOB3 we get access to the other games.

IOB1 -> DigDug

IOB3 -> Galaga (the one that was enabled by default on my model. Of course).

IOB2 -> Mappy

None -> Rolling Thunder

In fact, any combination of two or more IOBx will also give you Rolling Thunder. So the only step now is to decide what to do with these additional games... The easiest I think is adding a simple dip switch and you are done. 4 games for the price of 1!!!

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18 Discussions

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cb46052

4 months ago on Step 4

I have literally no experience with messing around with circuit boards and electronics. How do I do all of this without accidentally breaking something that will screw up my arcade machine, and how do I add a dip switch?

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AndrewF215

5 months ago

I just had the thought that you could add the missing B button by soldering wires to the control points visible on the circuit board. If you put in a second fire button then rolling thunder becomes playable. I just bought DigDug machine and am going to find the time to do this modification too.

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goodevil

Question 7 months ago on Step 4

I managed to follow your instuctable to Step4 but when I removed the circuit board the IOB1-4 Solder points are covered by a glob of black resin. Is it safe to remove this somehow?

6 answers
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seaprimategoodevil

Answer 7 months ago

is the resin blob directly in the center or off to one side? The solder points on my board were off to one side under one of the black foam spacers that you can peel off. There was a circle of potting resin in the center, but I didn't need to remove it to get to the solder points.

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goodevilseaprimate

Reply 7 months ago

It's kinda over the terminals, I have attached a photo. I will try and slice it off with a scalpel... I will let you know how it goes.

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seaprimategoodevil

Reply 7 months ago

That stinks, the one I bought last week didn't have it. Maybe it's certain lots, and busier stores get newer inventory faster. Though mine wasn't galaga, it was digdug, but exact same brand and model.

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goodevilgoodevil

Reply 7 months ago

I couldn't use the scalpel to remove the blob, so I used a tiny grinding tool. It took ages as I was careful not to grind away any bits. I've attached a picture, which shows the exposed terminals. So they added blob is just there to stop you switching games...

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goodevilgoodevil

Reply 7 months ago

I soldered in the wires and it all works fine I can ow switch between the games. I just need to add the dip switch.

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Klp1goodevil

Answer 7 months ago

Same here, im going to mechanicly grind mine off (being super carefull) heat didnt work on it sadly, may try cold to freeze it to see if it cracks easy first though

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seaprimate

7 months ago

On my version (Digdug) for the same brand/device:
IOB1=Pacman
IOB2 or IOB2&3=Mappy
IOB3=Galaga

IOB1&3=Galaxian
IOB1&2=DigDug
IOB1&2&3 or IOB0=Rolling Thunder

Note, the left IOB pads all connect to a common ground, so you can hook up just 4 wires total, one wire to each of the three right pads, and one ground wire on any one of the left pads (doesn't matter which)


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bbeadman

7 months ago

I got mine to play galaxian, dig dug, pacman, mappy, rolling thjnder as well as galaga. There are 8 total switch settings. I dont think i tried them all but just playing around thats what i got

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luisa343

1 year ago on Step 2

Hi, just pick the Galaga cabinet up yesterday, added an internal battery, and after trying to get the other games to boot I managed to launch Galaxian! I managed to do this by bridging IOB1 (maybe the right point on IOB1, not sure) and IOB3. I was only able to launch Galaxian and Mappy. I'll try this again tomorrow.

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luisa343luisa343

Reply 1 year ago

Discovered there are actually 6 games. Dig Dug, Galaga, Galaxian, Mappy, Pac-Man, and Rolling Thunder. I've also added a dip switch so I can easily switch between each game after a restart. I'll post images tommorow.

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PabloG28luisa343

Reply 8 months ago

Hello.
Do you have the image of how you place the dip switch.

Thanks

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luisa343PabloG28

Reply 8 months ago

Oh forgot to upload the pictures of what I did, sorry. What you have to do is solder wires onto each of the terminals on IOB1, IOB2, and IOB3 and then solder them to the dip switch without bridging any of them. Cut a hole for the dip switch and glue it all into place. Might want to also glue over where you solder so that it doesn't come undone.

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luisa343luisa343

Reply 8 months ago

These are the games that are on the machine: Galaga, Galaxian, Mappy, Pac-Man, Dig Dug, and Rolling Thunder. Rolling Thunder needs an addition button to play and Burger Time might also be on there, but I'm not 100% sure about that.

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Thorondor95

1 year ago

Instructables is 100% anti-government-cheapskate.