4 Game Micro Player Galaga

Introduction: 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

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!!!

2 People Made This Project!

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24 Discussions

0
MoSeS_1592
MoSeS_1592

7 months ago

Has anyone tried this hack on Ms. PacMan, Elevator Action, Bad Dudes, or Karate Champ, or Bubble Bobble to see if any other new hidden games are present? I Tried this on a Caveman Ninja and it only includes Galaga and Rolling Thunder.

I also swapped the wires to the control panel so the A and B buttons are swapped into the proper position relative to an NES controller. Caveman Ninja and Rolling Thunder are almost impossible to play on these machines with the B and A button being flipped imo.

Strange thing is after I swapped the wires for the A and B button (which worked), the sound completely cut out and I have no idea why. I'm pretty sure its unrelated but still frustrating.

0
tutone68
tutone68

Reply 5 months ago

Here is a picture of the PCB from a Ms. Pacman My Arcade as you can see it also has the IOB1, IOB3 and IOB 2 just like the Pacman my arcade does only thing I could see different was Pacman has a blob of solder or 0 ohm resistor from the ground side over to the IOB1 side.. Now on the Ms. Pacman PCB there is solder on each soldering pads but none of them are touching each other I tried to jumper each IOB'S and nothing happened just loaded Ms. Pacman, So in theory My arcade decided to make Ms. Pacman a one game dedicated machine

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0
crowland1
crowland1

7 months ago

I've just done this on my son's Dig Dug and it works great, he's thrilled with the additional 5 games.
I did it by using 3 push switches, joined a leg from each button to each other, then to one of the left side jumpers (all 3 are gnd), then a wire from each switch to each of the three right side jumpers.
You may be able to fit the 3 buttons so they're coming out of the top of the unit, there's a narrow space where the speaker / headphone jack PCB is that may be able to accommodate the switches.

0
AndrewF215
AndrewF215

1 year 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.

0
seaprimate
seaprimate

Reply 9 months ago

Yup, you can. Works as expected. This setup isn't pretty, and people with more time and inclination could make a more professional look, but I personally like the aesthetics of roughly hacked electronics.

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0
alb65
alb65

1 year ago

Hello, mine as "black glue" on the IOB.

Do you know how to remove it please ?

edit : hot gun but some triccky.

parts of pcb go out. luckyli only ground, so 2 of 3 grounds = no sound.

with first ground all is ok :)

thanks a lot !

need to buy the roolingthunder cab, because need two button for this game

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0
seaprimate
seaprimate

Reply 9 months ago

If you lost the sound after removing the potting, you can solder a wire directly from the negative terminal of the speaker to the negative terminal on the battery pack to reestablish the ground.

Also, you can get momentary spst push buttons and solder them to button A and/or Button B pads on the main board with some wire.

0
cb46052
cb46052

1 year 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?

0
goodevil
goodevil

Question 1 year 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?

0
seaprimate
seaprimate

Answer 1 year 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.

0
goodevil
goodevil

Reply 1 year 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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0
seaprimate
seaprimate

Reply 1 year 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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0
goodevil
goodevil

Reply 1 year 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...

20190120_155419.jpg
1
goodevil
goodevil

Reply 1 year 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.

20190120_162020.jpg20190120_121509.jpg20190120_120520.jpg
0
Klp1
Klp1

Answer 1 year 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

0
seaprimate
seaprimate

1 year 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)


1
bbeadman
bbeadman

1 year 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

0
luisa343
luisa343

2 years 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.

0
luisa343
luisa343

Reply 2 years 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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PabloG28
PabloG28

Reply 1 year ago

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

Thanks