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That's some nice runtime boost, thanks for sharing! For the BIOS: You can swap the BIOS chip between the 79k and 90k consoles, as @mixa232323 already mentioned. I verified that it works both ways (even though I don't know why you would put a 90k BIOS on a 79k console...). It doesn't seem like...

I see 2 possible issues with the 7805: The dropout voltage is about 1.5 to 2V if I remember correctly. That means you should not go below 6.5V on the input, otherwise the output voltage will drop. The efficiency is really only an "issue" with bigger loads. Let's say you draw 1A from the USBs...

Thanks for the hint, I realized my phrasing was pretty bad! By EE+GS I meant the EE chip and GS chip, because I can only undervolt both at the same time. They are supplied by the same rail. That was corrected in the post above. I've heard that there is sime homebrew stuff for measuring the core...

Update time! Removing the DSP and MechaCon is way outside the scope of this project. It might be possible, but I’m not going to proceed in this direction. The goal was to make the mainboard equivalent to a trimmed one. If I start changing the scope of the project I will never have a portable in...

There are actually no plans to sell any boards. My time for all the hobby stuff is pretty limited and selling things would just take that time away from the things I enjoy doing. Sorry! But I will release the schematics, board layout and BOM for anyone to modify and reproduce, so when the time...

I appreciate the suggestion, the VoCore2 looks pretty cool actually. I've seen that people were able to get samba working on the Mediatek MT7628 (real shame that you can only get it on aliexpress), so it might be feasible to use it on a PS2. However, I have decided to ditch the SMB game loading...

That's a good point, thanks! The MX4SIO was completely off my radar for game compatibility reasons, but it looks like they improved it recently! I ordered the MX4SIO + a samsung SD card and will try to do some tests on the weekend. There is only one concern I have when it comes to implementing...

Small update! Ethernet SMB game loading is fully working, no modifications required! I figured it would be easier and faster to solder the ffc adapter for my mini router by hand, it's just 8 wires. Not my finest soldering job, but it will do just fine for testing. Below is an image of the...

Thanks! I said that I would take this week off, but I couldn't resist... I've played some games on the board now for a couple of hours and.... man, I hate USB loading; loading times are terribly slow, FMVs are hardly watchable and compatability is trash. And don't get me started on all the...

Update time! 3 weeks have passed since my last update and in this time, I went through engineering hell and back. But the hard work was worth it, I am excited to announce that the first prototype of my custom PS2 mainboard finally boots! I literally managed to get it working 2h ago and the...

I do have the same mainboard here with all chips removed. The RESET input pin on the Mechacon is G3 and from that pin I traced it back to the test point I marked in the image below. I verified it by measuring the continuity to the tact switch on the front power board, sadly I don't have a...

I might be living in my company bubble when it comes to via filling. :?: We mainly work with <0,4mm pitch WLCSP packages with laser drilled uvias and for that our assembly house reccomends conductive filling to improve the soldering process. Apparently they found that those pads are more planar...

Update time! A lot has happened since my last post. I will go over all my points and I would like to start with the BIOS. Reprogrammable BIOS I hopefully managed to drastically increase the stability and compatibility of my BIOS mod (don’t jinx it, I’m still in the testing phase!). Here’s the...

Another small update! My first point is probably a bit off-topic, but I think it might be interesting. In a conversation with Mister M I was made aware of a problem he has with custom regulators on the 90k mainboards. Apparently, the console always died when he tried to power it externally. I...

Yes, I am indeed planning to make the schematics and layout public, once I have a working board. I may also release the modules I use for testing the mainboard (memory card, PMS, video/audio relocation, gamepad/memory card interface, ethernet module) as reference designs, in case there is...

Hi there! This is my first post here! I’ve been a long-time lurker around this forum and finally decided to post some progress on my latest project, as I think it might also help other people working on PS2s. What is this project about? It is about creating a PS2 system with minimal size and...

Hi everyone! Long-time lurker here! I'm some austrian guy doing electronics as a job & hobby and I'm currently working on a PS2 project that I thought I would share here soon, as it might be interesting for some people.