Worklog AtomicPlayStation2: My first portable project. My first portable PS2.

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Hi guys! I decided to start my first portable project based on PS2. The first stage was to get some PS2s and select what to be used. I decide to use that:

IMG_20210413_144807.jpg




This is a SCPH79006 with the GH-061-42 mainboard:


IMG_20210420_222141.jpg



As you can see I started to remove some components that are out of the trimm region just to familiarize with my soldering station (This is a new one I bought recently)
I'm using a parking car screen just to do quick tests. My plan is to use a 5inch hdmidisplay + PS2 2 HDMI adapter for the final mount, but for now this is ok.
IMG_20210413_144822.jpg
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In order to start the board trim, last night I was removing the components that are over the cutting line. I'm using the worklog of @Benge : benge_ps2_worklog because it seems to be the same boards.
I ended removing all the components of the bottom side but I still have to remove the ones of the upper side:

IMG-20210421-WA0000.jpeg


I'll be cutting it in the next days but I'm thinking to buy a new drill because mine has the axis not centered.

In the mean time, I bought 4 voltage regulators. All of them are not lineal so probably I'll need to buy one for them for the 1.75v source.

And that's all for now! See you guys !!!!!
 

Benge

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For the trim here is the link to the official trimming guide :

But yes you can try to do like me, try to cut a little wider anyway, there is no second chance if you cut too much.
In addition, if this is your first cut, it is more safe.

And yes a good drill with a straight axis is much precise.

So good luck for the trim ;)
Yesss!!! Thanks Benge! I was comparing the board used in the guide but I think that is a little bit different that the one I have.
Regarding to the drill, thanks for your advice. it triggers to me to buy a new one :D

By the way, your ps2 is really beautilful.. you inspired me to build my own portable :D

See you soon !!
 
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Hi guys, I have some updates !!

Finally, one of my best friends (Thanks Eze Manoukian) and Me trimmed the mainboard and this is the results of that:

IMG_20210422_195719.jpg
IMG_20210422_201737.jpg
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After some sanding with sandpaper of 80,500 and 600 and cleaning I got the next result:

IMG_20210423_205932.jpg

IMG-20210423-WA0077.jpeg
IMG-20210423-WA0084.jpg
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I ensured that there is no short circuit between layers. After sanding the layers seems to be good isolated between them:

Screenshot from 2021-04-25 14-10-33.png
Screenshot from 2021-04-25 14-11-07.png


Finally, I made my temporal source for the required voltage, wired them to the main board and connect it to my screen... and everything looked good


IMG_20210424_142041.jpg
IMG_20210424_191740.jpg


Screenshot from 2021-04-25 15-02-19.png



BUT! I realized that I removed all the components related with the audio and the YPrPb functionality ( ouch... My mistake.. Probably I should have read a little bit more about those topics)
So the situation now is,

  1. For audio i need something like the Uamp but there is no stock of that right now. I also could use the github open source project to do one of them by hand, but here in my country is not easy to find some electronica components like the microcontrollers used in that board. I'm thinking in to start again with another ps2 mainboard but leaving the audio circuitery intact.
  2. For video , my idea was to use an ps2tohdmi (actually, I already bought one of them) but I'm in the same scenario that in the point 1): I removed all the circuitry. Here, I can start again with a new mainboard OR use only the RCA output.
For now, I think that I'll start to work in a new mainboard. I think that this is the straight forward option that I have. I don't know yet :rothink:

An adittional thing is that i wired the joystick to the mainboard and it works properly.

Anyway... bye guys!!!!!!
 

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Ok guys, I'm here again. I had to start again with a new mainboard. This time, I use a very similar version: the GH-061-12. I did all the trimming work again and after that it works. Here some photos:

IMG_20210425_192447.jpg
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<OFFTOPIC> I added to my microscope a little reed switch to trigger the photo using a little magnet because when you push the "photo button" photos are taken but the movement
of the entire microscope spoils it.
IMG_20210426_125716.jpg
PIC011.JPG
PIC012.JPG
PIC014.JPG


As you can see, now I didn't touch the audio/video circuitry ! My idea is to use a really simple audio amplifier connected to some speakers.

IMG_20210426_211207.jpg


Here is the voltage relocation made:


atras.jpeg



After that, turning all on, the mainboard works fine (again)!!


IMG_20210426_225919.jpg


I had problems testing the audio outputs but after some measurements and look into the trimming guide I realized that 5v were missing in the pin7 of the audio DAC :

IMG_20210427_105307.jpg


Probably I could remove the 78M05 regulator. I'll do it for the next update!

I still have to test:
  • Joystick
  • Memory card
  • ps2toHDMI
  • USB
If everything goes fine, I'll be posting a new update after test those things. See you soon!!!!!!!!
 

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Hi guys.. here again! after some days, I could test joystick, USB, memory and PS2toHDMI. I tested it with Dragon Ball Budokai Tenkaichi 3 and it runs ok!! I put temporal connectors for joystick and memory to be able to disconnect it during this process. I'm using the ps2 usb board just for now, I'll be dealing with that soon.
IMG_20210429_004151.jpg
IMG_20210429_004210.jpg

This is the PS2HDMI board. I removed some unused components(like the audio jack) and connected the board to a video ps2 connector. It worked
fine so I'll be working on that when I design the case for my APS2.

IMG_20210429_201519.jpg
IMG_20210429_201528.jpg


After All those tests, I started to study the Dualshock protocol to implement a ps2 controller with an arduino board or something like that.
In order to make a "ps2 controller sniffer" I made these connections that allows me to monitor the transactions between them.

IMG_20210502_155342.jpg
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I'm using an Arduino Nano board and this is the first version of the state machine that I implemented. Currently, this is not working(LOL)
but I'm going to get a logic analyzer in a few days and I'll be able to log all the transactions between the ps2 and the joystick.

joySM.png



Another thing I tried was to remove the ethernet integrated circuit of the mainboard. I just wanted to know if it reduces the power consuption. So,
before to do that, I took the power measurement. I got 1.30A while DBZ were running and 1.24 during a , let say, waiting state.
Then, I removed the ethernet chip..... and my ps2 didn't boot anymore:( conclusion: DON'T DO THAT!!!
After resoldering the chip ( about to 10 times) my ps2 finally booted!!! (close enough)


WhatsApp Image 2021-05-08 at 9.57.36 AM.jpeg
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Finally, I soldered the wires of the USB (B+ and B-) to a bigger board to make easier the final soldering:

IMG_20210508_081111.jpg
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IMG_20210508_092201.jpg

WhatsApp Image 2021-05-10 at 12.02.27 AM.jpeg


So... that's it for now. see you in the next days!!!!
 
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Very interested if you can get an Arduino Nano working as a controller interface, good luck with that!
 

MRKane

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Do you get any letterboxing through the image upscaler? The one that I used for one of my portables had quite a large border around the entire image and it was a true shame as it'd be perfect if it didn't do that. I'd hope that this issue has been resolved because it really knocks down the quality of the HDMI scalar!
 
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Do you get any letterboxing through the image upscaler? The one that I used for one of my portables had quite a large border around the entire image and it was a true shame as it'd be perfect if it didn't do that. I'd hope that this issue has been resolved because it really knocks down the quality of the HDMI scalar!
Hi MRKane.. sorry what is an image upscaler?
 

MRKane

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The PS2toHDMI board you've got there is an image upscaler that uses yPbPr and gives a very nice picture over HDMI. The only issue I had with them a few years ago was the black borders around the image and I'm keen to know if the picture now fills the screen during use :)
 
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The PS2toHDMI board you've got there is an image upscaler that uses yPbPr and gives a very nice picture over HDMI. The only issue I had with them a few years ago was the black borders around the image and I'm keen to know if the picture now fills the screen during use :)
Oh I see!!! You know what? Yesterday was the first time that I tested the PS2toHDMI with a 5'' HDMI screen... and yessss.. There are black borders there!! And I though the same thing as you: It's a shame :( I'll upload a picture of that in my next post ;)
 
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estou com esse medelo de playstation 2 para o meu projeto, so que ele esta sem áudioe video, alguem consegue me ajudar ?
Wenderson
The language used in the forum is English. The fact that you use Portuguese will undoubtedly delay the receipt of any type of assistance.
 
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