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

You might also be interested in my, even smaller, Tiny Galaga: https://www.instructables.com/Tiny-Arcade-Galaga/

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!

Recommendations

  • Reclaimed Materials Contest

    Reclaimed Materials Contest
  • Home Cooked Speed Challenge

    Home Cooked Speed Challenge
  • Organization Contest

    Organization Contest

28 Comments

0
MoSeS_1592
MoSeS_1592

1 year 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
Sped
Sped

Reply 6 months ago

The sound on mine died too and I narrowed it down to the Very small 6 pin chip U8 or U6 if i remember correctly, I fixed it by shorting across it. If you look at the photo of this area in this guide the pins to short are the upper left pin to the bottom right pin, I removed the chip but it may work with the chip in place.

0
tutone68
tutone68

Reply 1 year 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

20200526_193024.jpg
0
CusmaR
CusmaR

9 months ago

I tried this a few minutes ago on my Caveman ninja, all i could find was Galaxian and Galaga, IOB1 and IOB3. Anyone else found anything more on a caveman ninja?

I tried to solder, but god damn i suck... Will order a dip-switch and then try again.

0
vivvvi
vivvvi

Question 10 months ago

I was bought the bubble version of this little cabinet, followed the instructions to find everything identical internally to the photos. However any of the OBx pads shorted in any combo doesn’t change the default bubble bobble booting.

anyone else have this experience?

0
AndyThePanda
AndyThePanda

Answer 10 months ago

I have also tried this mod on Bubble Bobble version with the same result - no other game ROM:s seem to be present.

0
crowland1
crowland1

1 year 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

2 years 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 1 year 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.

20200121_215354.jpg
0
alb65
alb65

2 years 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

IMG_20190907_191230.jpg
0
seaprimate
seaprimate

Reply 1 year 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

2 years 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 2 years 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 2 years 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 2 years 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.

20190113_204840.jpg
0
seaprimate
seaprimate

Reply 2 years 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.

20190116_235613.jpg
0
goodevil
goodevil

Reply 2 years 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
0
goodevil
goodevil

Reply 2 years 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 2 years 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

2 years 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)